Cost of adding 1000 square feet to house
a guide for increasing square footage |
(Image credit: Alamy)
It’s vital to know about home addition costs when you’re planning to increase the size of your house. Whether it’s a single room or a larger addition, it’s essential to have an adequate budget for the project from the start.
Building an addition can be the solution to accommodating a growing family, might provide space to work from home or for study there, or create room to welcome an older family member to live with you, and what you need the space for will determine the type of home addition that’s required.
We’ve asked an expert on home addition ideas to provide the details on what a home addition might cost, allowing you to plan to finance your extra space.
Home addition costs
There are many home addition planning factors that influence home addition costs. As you’d expect, the size of the addition matters, as does its type – sunroom ideas and conservatory ideas will be cheaper than a solid-build, two story addition.
How much does a side, back, or front addition cost?
The cost of adding space at the side, back, or front of your house depends on choices such as the size, requirements, and location of the addition.
‘On average, a new home addition tends to cost between $20,900 and $72,600 (£15,215 and £52,853),’ explains Bailey Carson, home care expert at Angi .
In terms of square footage? ‘You can expect to pay between $80 and $200 per square foot (£627 and £1,567 per square meter) for a first floor room, and $100 to $300 per square foot (£783 and £2,350 per square meter) for a second story room,’ she says.
‘Keep in mind for first floor additions that you may need to account for leveling the ground and pouring a new foundation if there isn’t already one in place.’
How much does a room addition cost?
A room addition could provide the extra space that’s essential because your family size has increased since you first bought the house, or your circumstances have otherwise changed in that time.
Once again, the size of room as well as what sort of room it is both matter. ‘Generally, bathrooms range from $6,200 to $15,500 (£4,513 to £11,284),’ says Bailey.
‘Bedrooms are a little more expensive, ranging from $8,600 to $21,600 (£6,261 to £15,725). Living rooms range from $17,300 to $43,200 (£12,595 to £31,451). This cost increase is often due to size.
‘Kitchens are the most expensive common room, ranging from $48,000 to $95,000 (£34,946 to £69,159), since they’re the most complex room with various appliances, plumbing and electrical work required.’
How much does a cantilever room addition cost?
A cantilever extends beyond the existing exterior walls, and can be a stylish way to create more space – perhaps for a home office or a bedroom. But what should you expect as home addition costs if this is your preferred option?
‘A cantilever costs between $15,000 and $25,000 (£10,920 and £18,199), depending on the style, size and location,’ says Bailey.
How much does a sunroom cost?
A sunroom can be a great way to satisfy a need for extra living space. But what of the home addition costs when a sunroom increases house size?
‘The average cost to add a sunroom to your home is around $16,315 (£11,877), but this can go up to $70,000 (£50,959), depending on size, location and requirements like HVAC, electricity, insulation and more,’ says Bailey.
How much does a new level cost?
A second story addition creates a new level for a home, but home addition costs are likely to be among the highest you could expect to pay if you take this route.
‘A second story addition tends to cost between $300 and $500 per square foot (£2,350 and £3,918 per square metre),’ says Bailey. ‘Keep in mind that second story additions generally cost more than first story additions. Permits, materials, labor costs, size, requirements and location all factor into the total cost for a new level.’
Which other costs should be factored in when planning an addition?
It’s important to take account of the potential need to pay other bills before embarking on a home addition.
‘Keep in mind that many rooms require electric wiring, paint and heating or air conditioning to be a comfortable addition to your home. Some rooms will also require plumbing, waterproofing and other factors to ensure it’s there to stay.
‘One cost people tend to overlook is the fee for any permits required to build the addition. Check with your local permitting office to make sure you know what to expect.
‘Then, before you get started, sit down with your contractor and go over everything that needs to be included in the new room – this will help you avoid surprise costs later. Ask about preparation for the addition, as well as any demolition, cleanup and haul-away costs that may come up along the way.’
How much does it cost to add 1000 square feet to a house?
Based on a cost of $80 and $200 per square foot (£627 and £1,567 per square metre), you can expect to pay between $80,000 and $200,000 (£58,244 and £145,589) to add 1000 square feet to a house.
However, bear in mind that this is for building out; for second story rooms costs for an addition are higher at $100 to $300 per square foot (£783 and £2,350 per square metre).
How much does it cost to add a 12 x 12 room to a house?
To add a 12 by 12 foot room to a house, you might typically pay between $11,520 and $28,800 (£8,386 and £20,964) to build out. But be aware that the type of room you are adding is an important factor in what the final bill will be. A kitchen will prove more expensive than an extra living space or home office, for example, because of the plumbing and electrical work.
Sarah is a freelance journalist and editor. Previously executive editor of Ideal Home, she’s specialized in interiors, property and gardens for over 20 years, and covers interior design, house design, gardens, and cleaning and organizing a home for H&G. She’s written for websites, including Houzz, Channel 4’s flagship website, 4Homes, and Future’s T3; national newspapers, including The Guardian; and magazines including Future’s Country Homes & Interiors, Homebuilding & Renovating, Period Living, and Style at Home, as well as House Beautiful, Good Homes, Grand Designs, Homes & Antiques, LandLove and The English Home among others.
Home Addition Costs in 2022
Typical Range:
$22,397 - $81,029
Cost data is based on actual project costs as reported by 4,921 HomeAdvisor members. Embed this data
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- Homeowners use HomeAdvisor to find pros for home projects.
- When their projects are done, they fill out a short cost survey.
- We compile the data and report costs back to you.
Updated June 3, 2022
Reviewed by Ezra Laniado, Expert Contributor.
Written by HomeAdvisor.
Whether you’re looking for a balcony or a bump-out, the national average for a home addition is $49,634. Thecost of a home addition typically ranges between $22,397 and $81,029. However, the price can surpass $100,000, depending on factors like the room type, style, and addition size, as well as the materials used.
2022 Notice: Material Prices Are Surging
Demand for siding and other building materials has grown over the past year. And as a result, manufacturers are increasing materials prices. Prices have gone up 5% to 10% this year, and many parts of the country are experiencing long delivery times. If you're planning a building project, we recommend starting as early as possible in the season, preparing for potential price fluctuations, and allowing extra time to order materials.
On This Page:
- Home Addition Cost Calculator
- Home Addition by Type of Room
- Home Addition by Style
- Home Addition by Size
- Home Addition by Material
- Home Addition by Labor
- General Contractor
- Architect
- Excavation and Demolition Pro
- Home Addition by Geographic Location
- Benefits of Building a Home Addition
- Building a Home Addition on a Budget
- DIY vs.Hiring a Home Addition Pro
Home Addition Cost Calculator
Let's calculate cost data for you. Where are you located?
Where are you located?
ZIP Code
| National Average | $49,634 |
| Typical Range | $22,397 - $81,029 |
| Low End - High End | $4,800 - $150,000 |
Cost data is based on actual project costs as reported by 4,921 HomeAdvisor members.
Home Addition by Type of Room
The room type you’re building is one of the first factors in determining your project cost. Rooms with plumbing, such as a kitchen or bathroom, are typically more expensive to add than rooms without, like a primary bedroom or sunroom.
Attic
Converting an attic into a livable space costs about $40,000. This conversion needs to have enough insulation and ventilation for comfortable year-round use. Plus, remember to account for the cost of installing a staircase in this room.
Bathroom
Adding a bathroom costs around $35,000, while adding a more luxurious and larger bathroom of 100 square feet will cost about $90,000. Bathrooms are a more expensive addition because they require plumbing, plus fixtures like showers and toilets.
Bedroom
A primary bedroom addition costs around $62,500, but if you’re planning to add an en suite bathroom, expect to spend up to $100,000.
Dining Room
A standard dining room is about 14-by-16 feet, and this costs about $20,000 to $45,000 to add to your home. Expect to pay more if you plan to add a wet bar or built-in cabinets and shelves.
Kitchen
A kitchen addition costs around $20,000 to $90,000.
Laundry Room
A laundry room addition costs about $8,070, including the cost of newer appliances, additional storage, and waterproof flooring.
Living Room
You’ll spend about $20,000 to $45,000 for a 12-by-18-foot living or family room. The cost will increase for larger rooms with high-end finishes and custom entertainment centers.
Mudroom and Sunroom
Mudrooms and sunrooms cost around $8,000 to $16,000. These are popular additions for added storage and living space. A 50-square-foot mudroom, including storage and built-in organization systems, costs around $12,000. Expect to spend $8,000 to $11,000 for a simple sunroom or upward of $80,000 for a 200-square-foot space with electrical wiring and heating.
Home Addition by Style
Home addition add-ons can vary by the style you choose.
Balcony
For the cost of a balcony addition, expect to pay roughly $5,000 to $10,000. Adding a balcony is a less expensive alternative to porches or decks if you want more outdoor space.
Bump-Out
A bump-out is an addition to a home's square footage—typically between a few feet and a single room—and a bump-out addition costs about $5,000 to $10,000. This is one of the least expensive home addition options, but it also tends to add the smallest amount of space to a home.
Cantilever
A cantilever costs around $15,000 to $25,000 and is an upper-floor home addition that juts out past the first floor.
Dormer
A dormer addition costs between $5,000 to $10,000 and is a roofed structure that usually includes a window. It’s commonly added to increase a loft or attic's usable space and create window openings in a roof plane.
Garage
Adding a garage costs around $25,000 to $50,000, depending on whether you want an HVAC system and electricity. Adding a garage is ideal if you want covered shelter for your car, a space for handy work, or additional storage.
In-Law Suite
An in-law suite is a small studio or apartment that adds separate living quarters to your property. In-law suite additions cost around $50,000 to over $100,000.
Modular Room
Modular or prefabricated rooms will generally cost between $20,000 and $30,000, or around $25 per square foot. This is a less expensive option for a home addition because it's manufactured and delivered to your property, but it often has fewer customization options.
Porch
Building a porch costs between $5,000 and $25,000. A new porch can add extra square footage to your home while also offering space to take a breath of fresh air.
Second-Story Addition
A second-story addition costs upward of $500 per square foot and is one of the most expensive addition types because it requires removing and replacing the existing roof.
Home Addition by Size
Most home additions cost about $80 to $200 per square foot, including materials and labor. The cost is likely to be much higher for a second-story addition, at around $300 to $500 per square foot.
| Additional Square Footage | Average Price Range |
|---|---|
| 100 | $8,000 – $20,000 |
| 200 | $16,000 – $40,000 |
| 300 | $24,000 – $60,000 |
| 400 | $32,000 – $80,000 |
| 500 | $40,000 – $100,000 |
| 600 | $48,000 – $120,000 |
| 700 | $56,000 – $140,000 |
| 800 | $64,000 – $160,000 |
| 900 | $72,000 – $180,000 |
| 1,000 | $80,000 – $200,000 |
Home Addition by Material
Material prices fluctuate vastly based on the design type and style you choose.
| Home Addition Material | Average Cost |
|---|---|
| Doors – exterior | $500 – $2,000 each |
| Doors – interior | $250 – $1,150 each |
| Drywall | $1 – $3 per square foot |
| Flooring | $0.50 – $15 per square foot |
| Foundation | $4 – $25 per square foot |
| Insulation | $2 per square foot |
| Paint | $2 – $5 per square foot |
| Roofing | $75 – $600 per square foot |
| Siding and trim | $1 – $30 per square foot |
| Support beams | $1,150 – $4,600 |
| Windows | $250 – $1,000 each |
Home Addition by Labor
Successful home additions require skilled laborers.
| Home Addition Pro | Average Price Range |
|---|---|
| Carpenter | $75 – $100 per hour |
| Demolition technician | $500 – $10,000 |
| Electrician | $40 – $100 per hour |
| HVAC technician | $50 – $100 per hour |
| Plumber | $50 – $200 per hour |
| Roofer | $40 – $80 per hour |
Find a Remodeling Pro for Your Home Addition
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Find a ProGeneral Contractor
General contractors oversee and manage the full scope of a project, typically after the designs have been drawn up and agreed upon.
Architect
A local architect can help ensure that your home addition matches seamlessly with the rest of your house. It’s usually not required to hire an architect for a home addition. However, these services can help the addition look and function its best and save you headaches and costs down the line. Architect fees typically fall 5% to 20% of the total project cost.
Excavation and Demolition Pro
To prepare the site for the new addition, there will need to be demolition and land excavation costs. Excavation alone will cost about $1,500 to $5,800, although these prices can be closer to $10,000 for bigger projects, like adding a second floor, installing a basement, or converting an attic.
Permits: Even a small 2-feet bump-out requires a permit from your city and will cost about $400–$2,000.
Cleanup: Construction cleanup costs around $470 and gets broken into two types: rough cleaning and final cleaning. Most general contractors will handle the rough cleanup, but you'll want to do a final, thorough cleaning. Many factors contribute to the final cost of any post-construction cleanup job, including:
Addition size: Larger projects command a higher overall price but usually at a lower per square foot rate.
Local competition: If you live in an area with several construction cleanup contractors available, you can get a more competitive price.
Supplies and equipment needed (for DIY solutions): If you’re tackling this job yourself, you’ll need to supply all the cleaning tools and equipment for dumping.
Home Addition by Geographic Location
Depending on where you live, construction costs can vary drastically from one location to another. Similar to how home prices with the same square footage can fluctuate remarkably between markets, so can the cost of an addition.
| U.S. City | Average Price Range for a Home Addition |
|---|---|
| Oklahoma City, Oklahoma | $4,931 – $16,780 |
| San Antonio, Texas | $12,384 – $35,620 |
| Memphis, Tennessee | $16,800 – $38,000 |
| Charlotte, North Carolina | $17,177 – $52,032 |
| Tampa, Florida | $22,314 – $61,316 |
| Portland Oregon | $21,681 – $69,842 |
| Seattle, Washington | $26,524 – $91,712 |
| Philadelphia, Pennsylvania | $27,006 – $83,650 |
| Boston, Massachusetts | $27,339 – $93,324 |
| New York, New York | $26,467 – $108,968 |
| Los Angeles, California | $54,319 – $128,117 |
Benefits of Building a Home Addition
Adding more space by building a home addition comes with many great benefits, including increased space, increasing your home value, and the potential for a better quality of life.
More space: An addition is an excellent option when you're starting to feel cramped in your home. Adding another bedroom, storage space, or recreation room can help tailor your house to your current needs and lifestyle.
Added property value: Investing in a home addition can give you more space, but it may also increase your home value if you decide to sell.
Bathroom: 53% return on investment (ROI)
Primary bedroom and bathroom: 63% ROI
Sunroom: 49% ROI
Two-story addition: 65% ROI
No need to move: Just because your family grows or needs more room doesn't mean you're ready to leave your house or neighborhood behind. An addition might offer you a way to stay where you're at without sacrificing space.
More luxury: Growing your current home might be your best bet for finally getting that new gourmet kitchen, home office, or first-floor primary bedroom.
Building a Home Addition on a Budget
Home additions can quickly grow in price and, in most cases, everything won’t go exactly as planned. It's important to set aside a percentage of your overall budget (2% to 20%) for contingency funds if any unforeseen costs present themselves during the construction.
Here are a few tips for keeping prices down:
Keep things simple.
Get several bids from various contractors to make sure you’re getting the right person for the job. The least expensive contractor isn't always your best option and doesn’t always save you money in the long run, so getting references can ensure you’re getting a quality pro.
Consider premade standalone options instead of customized versions to keep your overall budget down.
Check for tax credits or refunds. Home additions are considered capital improvements, and local governments and utility companies often offer rebates for energy-efficient purchases.
Be flexible. Remodels, renovations, or home additions almost always have a hiccup or two along the way. A willingness to adapt and modify as you go might keep you from completely blowing your budget.
DIY vs. Hiring a Home Addition Pro
Building a home addition isn't recommended as a DIY project, as this process involves demolition, construction, electrical work, and possibly plumbing, all dangerous and technical jobs. You could also make costly mistakes if you don't correctly lay the foundation or build the support beams. If you're skilled at tasks like painting or flooring, you could save money by doing those tasks yourself.
Hiring a local general contractor with home addition experience may be the wisest move you can make since they’ll take the burden off and get you the best result. The general contractor will handle hiring and working with all the other pros as part of their service.
Find the Home Addition Project for Your Budget
ZIP Code
Get Estimates NowFrequently Asked Questions
Is it less expensive to build out or build up?
When it comes to building an addition, it's preferable to expand your footprint and build out than to pop the top and build up.
How long does a home addition take to build?
On average, a home addition can take two to three months to build. However, due to ongoing industry-wide supply-chain issues, plan for the building process to take longer.
Is it cheaper to build a house or add-on?
Generally, it’s less expensive to build an add-on than to build a new house since add-ons typically cost $22,440 to $80,930 while a home build can cost $112,040 to $448,950. However, if your project is a complex addition—such as a luxurious 100-square-foot bathroom with new plumbing—multiple add-ons, or a second-story addition that requires removing the roof, your total can quickly increase.
What is a good size for a family room addition?
A good standard size for a family room addition is about 12-by-18 feet, which can fit a family of up to six people. But the ideal room size depends on several factors, like how many people are in your family, the size of your furnishings, and whether you prefer a cozy space or one that’s more open.
How far can you bump out a house?
You’ll have to check with your local building codes to determine how far you can bump out a house. A footed bump-out extends the farthest, while a cantilevered bump-out extends four times the depth of your existing jolts and is the most common bump-out type.
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Prices for extensions to the house in Omsk
The company "Eurostyle" in Omsk offers its services in the construction of extensions to the house.
Today, an extension to the house is the most affordable and popular method of increasing the building area. Indeed, sometimes the owners of the house dream, for example, of a summer kitchen or a veranda, in such cases an extension to the house saves.
Types of buildings and their features
The family decides what exactly to build on the additional territory depending on their desires and the final price they are willing to invest in this extension.
Among the popular options:
- main or additional bathroom;
- summer or insulated kitchen;
- dining room;
- summer garden;
- garage;
- terrace or veranda.
After you have decided on the purpose of the building, you should think about the materials for the construction. Lightweight materials are notable for their low cost and have a number of advantages, including: fast execution of the construction process; visually creates the impression of a solid structure; extended service life.
Technical details
Among the common materials used for turnkey construction of extensions:
- Brick. Known for its durability, professionals with experience can build a permanent structure that will last for many years.
- Bar. Popular because the material is natural and environmentally friendly. An extension from a bar is built faster than from other raw materials.
- Foam block. The material is much lighter than brick, but just as reliable. If a foam block is used, the construction can be completed in a short time.
- Wood frame. The most inexpensive option with a short time period of construction.
Regardless of what material the customer ends up buying, the main point has always been and remains the foundation. A common and optimal option is the foundation on screw piles. It does not require any special equipment for installation, it is an inexpensive solution that can be completed in a short time.
Steps for building a turnkey extension
- preparatory phase and earthworks;
- foundation installation;
- building walls;
- installation of window and door openings, roofs;
- finishing work.
An important aspect of the construction is that it is necessary to successfully connect the old part of the house with the new one, so that the overall structure is solid.
During the construction of a heated extension, additional insulation work is carried out. At the final stage, processing and coating with antiseptics takes place.
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Thanks to your company for our new sauna and windows with ceilings. We are very pleased with everything, we remember you with a kind word.
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I ordered windows from you in 2013, I was satisfied.
Thank you Eurostyle for the new roof, next year I plan to sheathe the house, I will contact you, I will recommend you to my friends.
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Reviews about working with us
Thanks to the Eurostyle company for our new veranda in the country house, everything was done with high quality and on time, the team is really professionals in their field, responsible and sociable guys answered all my questions regarding construction!!! I advise everyone, not expensive and high quality!!
Lidia O.
Irina Olegovna
I ordered windows from you in 2013, I was satisfied. Now we decided to replace the windows for my mother, I was looking for a company for a long time, I remembered about you, the phone has not changed. We arrived on time, installed everything perfectly, we were satisfied, for 3 years the prices were raised slightly, the work was done well, they also gave gifts, 3 years ago this was not the case. Thank you
Eurostyle ordered a gazebo (outbuilding) or a veranda, whoever calls it to the house in the country, wood worker. We are very satisfied with the work! Everything was done to us in a very short time. Woodcutter 1 day; gazebo 2 days. The site was clean, nothing had to be cleaned afterwards, neatly. The buildings themselves are made with high quality, conscientiously. Loyal company, went to meet us, patiently discussed all the options. The price suited us. I recommend this company to all my friends, personally verified! Thank you.
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Hello! We applied for the construction of an extension of the summer terrace! We ourselves do not understand anything about this, we were told how it would look better and oriented in size! A pleasant team of builders, hardworking guys, they do everything as if for themselves! Now at the final stage, they are sheathing, we can’t wait until we can spend evenings there! Thank you!
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What is important to know when planning a two-storey extension
Specialists of the diversified construction company G7 have been working in the English real estate and investment market for more than 10 years. The company specializes in residential refurbishment and refurbishment, construction and renovation of private homes and commercial buildings, interior design and landscaping, as well as the sale and investment of real estate in the UK.
If you own a two-storey house, a double-storey extension can be a strategic and cost-effective solution for you. In addition, this option will be a good alternative to moving to a larger house.
German Kudryavtsev, director of the G7 construction company, told us about the important nuances that need to be taken into account when building a two-story house extension.
Two-story extensions greatly increase the functional living space of the home, as well as correcting the layout and interior design flaws of older houses that are no longer relevant to modern life, such as the lack of bathrooms next to the bedrooms, inconvenient access to the garden or cramped kitchens.
For small houses and growing families living in them, this is the easiest way to increase living space and add an extra bedroom.
Finally, a two-storey extension is a cost-effective option to increase the value per square meter of your property. It also greatly improves the appearance of the house.
Of course, making such a decision, especially if you are considering it as an investment, you will need the advice of a real estate specialist who will evaluate whether the construction costs will exceed the resulting increase in the price of your home. It is also important to know the marginal value of real estate in your area.
But it is important to take into account not only this, but also the fact that, in the long run, an extension may still be more profitable than moving to a new house.
You also need to pay attention to the fact that a two-story extension is more profitable than a one-story one and here's why - an additional floor doubles the size of the new living space, and the costs will not be much higher than a one-story extension, because such a complex and expensive element as a roof will be needed anyway regardless of whether the extension will be one or two floors. Therefore, in the second case, you pay extra only for additional floor coverings and wall extensions.
The main limitation of two-story extensions is usually the height of the roof. As a rule, it is required that the height of its crest and eaves should not be higher than the existing roof of the house.
In cases where the building has low ceilings, it can be difficult to build an extension high enough to connect two full (2.4 m) floors. However, there are solutions for this as well, such as using lower ceiling heights in new spaces, especially at ground floor level, partially integrating upstairs rooms into the roof space, or a slight recess into the ground.
A small pitched roof is a good option, it can cover a large space without being too high on its own, but this is not always acceptable, especially in an older building. A flat roof can cover an area of any size, but is usually not suitable for a two-story extension unless it is part of an overall modern design scheme.
Other solutions for roofing extensions with effective use of the allowable height are the creation of a series of small intersecting traditional pitched roofs (at an angle of 40 to 55 degrees) or a flat roof area “hidden” behind a more traditional pitched roof.
In terms of building costs excluding interior fit-outs (documentation, architects and related government oversight), the design you choose, the complexity of the work and the materials used have a significant impact, but if we talk about the average price in London, the cost of the finished building per square meter will be from 1860 to 2100 pounds.
Major repairs will cost an average of £1,000 per square metre.
