2019 Home Addition Costs | Cost To Add A Room Per Square Foot

Average Cost To Build An Addition

The average cost to build a home addition is $48,000, with most homeowners spending from $22,500 to $74,000, or between $86 to $208 per square foot. Prices depend on room size, labor, and the quality of materials. Adding a room gives a great return on the investment of over 50%.

To get started, get free estimates from home addition contractors near you.

There are many options to choose from when planning to add extra space to your home. You can add a bathroom, master bedroom suite, build an in-law apartment, build a detached garage, family room, or add a second floor. Building an addition increases the square footage, which adds value to a home. Each type of addition project has estimated prices primarily based on the size that we'll cover below.

A home addition costs between $86 and $208 per square foot, with most spending $128 per square foot on average. The final cost depends on if your building-up or building-out, labor costs, and the quality of materials used.

On average, the addition consists of a basic room with necessary electrical wiring and little to no plumbing. Features such as bedrooms and bathrooms with luxury fixtures start raising that square footage price. Every door, window, and wall adds to the price. The more luxurious the design of the addition, like a chefs gourmet kitchen with smart appliances and heavier electrical needs, the higher the priceat $400 per square foot or higher.

Calculating by square footage is quite accurate when trying to assess the final cost of an addition. An average 300 square foot addition costs $25,800 to $62,400 while a 400 square foot addition runs $34,400 to $83,200. Costs below are figured at $86 and $208 per square foot to show the most basic cost to the highest.

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At $128 per square foot, a 10x20 bedroom addition costs $25,600 on average, while a 20x20 family room ranges from $51,200. When adding a bathroom that requires plumbing, expect to spend from $18,000 to $47,000.

There are many ways to increase your square footage. You can build up by adding a second floor, or you can build out and add a room by adding a section of house that attaches through an opening in an outside wall. You can also convert one kind of room to another kind of room better suited to meet your needs. You can build a detached garage or workshop. All options qualify as a house addition.

When considering a significant room addition, be sure to consult with an architect to draft the design and style you're looking for. Next, hire a structural engineer to make sure the addition plans are sound before construction. Finally, hire a general contractor who will coordinate all the development and building in the correct order.

Its impossible to figure the exact cost of adding a room to a house until you know the size of the room and every aspect of whats built into it. The cost of labor in the area where you live will also impact the price. The following examples reflect the general cost of the project.

The cost to add a bedroom is $100 to $155 per square foot, or about $10,300 to $24,900 on average. A small 12x12 bedroom (144-square-feet) with a foundation and a roof will cost in the neighborhood of $12,400 to $22,300 if you choose to add it to the side of the house.

Variables would include how many outlets are installed, the type and amount of lighting, the type of roof that matches the existing house, and the flooring. Other options that affect the bedroom addition cost are the size of the closet, the type of doors on the closet, and the size and number of windows and window seats.

The cost of a 464-square-foot master bedroom suite addition including a master bathroom costs between $59,400 and $96,500 or more. This custom-built project includes a 289 sqft. bedroom, a 50 sqft. closet, and 125 sqft. bathroom. A luxury master bedroom with a spa-like bathroom will cost $100,000 and up.

A master bedroom is usually bigger, from 200 to 350 square feet. It has a walk-in closet that can be anywhere from 25 to 100 square feet in size with its own private master bathroom, which can range in size from 108 to 156 square feet. In luxury homes, the master suite can be quite a bit larger.

Lately, the trend in luxury homes is to have a master suite, which is like a small apartment on its own. It can include a sitting room, an exercise room, or even a swim spa. Many times the walk-in closet will host its own washer and dryer, and the sitting room may have a tiny kitchenette. Add a set of French doors or a deck or balcony, and the costs rise, but so does the luxury.

A bathroom addition costs from $18,000 to $47,000 when building out versus remodeling an existing space. A spa-like mast bathroom can cost $80,000 or more. The National Association of Realtors report says your investment will yield a 50% return of costs when the time comes to sell, but a bonus is that buyers are quicker to buy a house with the same number of bathrooms as bedrooms. In general, adding a bathroom is one of the more expensive home additions due to the amount of plumbing in such a small space.

A prefabricated sunroom addition cost ranges from $5,000 to $30,000 with most homeowners spending around $168 to $232 per square foot on average for materials, slab, and professional assembly. Smaller sunrooms in high wind or snow load climates cost more than larger units built in mild climates.

Prices depend if it's a three-season or four-season sunroom, the size, and if it's custom built. Custom designed and engineered sunrooms cost between $300 and $400 per square foot. Most prefabricated sunroom kits are built offsite and then delivered to your home, but youll need to:

Adding a 4-season sunroom or solarium costs $180 to $250 per square foot or about $20 per square foot more than a three-season room. Costs vary with the wind load and snow load required. Choose from a four-season room, by adding a heating and cooling system to the three-season room, or a solarium, by enclosing the patio with a glass roof and panels.

Since sunrooms are mostly comprised of glass, they can be built to match the aesthetic of any home dcor. Save on your cost to build a sunroom addition by putting in a window AC unit and a plug-in heater rather than extending the HVAC ducting into the new sunroom.

The addition of a 400-square-foot family room costs between $34,400 and $83,200, or about $86 to $200 per square foot. The family room addition cost covers the new foundation and roofing, all outside walls with siding and insulation, and all electrical work (and plumbing is extra if a new bathroom comes with the family room). Heating and AC ductwork is installed and connected to the furnace. Flooring, windows, and lighting fixtures are all included in that price.

A kitchen addition costs between $25,100 to $43,400 on average, while an upscale kitchen can cost $100,000 or more. The lower price describes a standard 10x10 kitchen with fixtures that are low- to mid-range. The upper price encompasses higher-priced appliances and larger square footage. When you move into the area of gourmet kitchens, the increase in cost is mostly on high-end appliances, countertops, and fixtures.

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The cost to add a second story addition with multiple rooms on a 1,400-square-foot house costs $179,000 on average with prices as high as $350,000. Youre essentially building an entirly new house on top of your existing home without the cost of a foundation. All the plumbing will have to be brought up to the second floor, as well as the electrical wiring. Framing and drywall must be installed to create rooms, and all walls and ceilings painted.

Building a second story over a garage can cost even more if the garage is detached and the existing foundation isnt of a high enough quality to support a second floor.

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The cost to build a 2-car garage is about $23,900 or about $49 per square foot. The cost to add on a 1-car garage is about $10,800, while a 3-car garage can be added on to your home for between $28,200 to $42,700.

This basic garage addition cost includes no high-end customizations. Its merely a place to park your cars. Generally, the larger the square footage, the less it will cost, in the case of building a garage. The price depends on the cost of local materials and labor, and youll want to match the color and type of roofing and siding materials. A garage addition can recoup about 80% of the cost in relation to the homes increased equity.

Building an attached garage is cheaper, but if you want to construct a detached garage, expect to pay $3,000 to $5,000 more. Also, check with local building codes and HOA rules to make sure youre allowed to build a detached garage on your lot.

The average cost of an in-law suite addition is $90,000, with most spending between $78,000 and $135,000 for a 600750 square foot dwelling. An in-law suite includes one bedroom and one bathroom, a kitchenette, laundry room, living room, and perhaps some storage on the back porch. It is a good investment in the value of your home, and if your guests visit occasionally, it can be rented out per night. When it comes to selling your home, this is a great listing item.

At an average of $45 per square foot, a small front porch addition costs about $2,900 while a porch running the full width of your home ranges from $15,000 to $20,000. Adding a screened-in porch will cost between $18,000 and $24,000. The final price depends on the size and complexity of the porch. Any porch option you decide to go with will add curb appeal and have a good return of 30%60% on your investment.

Adding a modular addition to an existing home costs $90 per square foot before the additional cost of site prep, excavation, and a poured foundation. Modular addition pricing for adding a second floor to your home with a modular home (rather than a stick-built buildup) is about $98,000.

This is for a master bedroom suite and two other bedrooms with an open area to the house below. It is comparable to stick-built costs, but the length of time your home is under construction will be shorter since the modular is built offsite and shipped to you.

A kitchen bump-out addition costs $5,000 to $30,000. Bumping out two feet along one side of the kitchen is more cost-effective than adding on an entire room to get a bigger kitchen, although you can add up to 15 feet in a bump out if you add footings or more foundation.

If one side of your kitchen is ten feet long, bumping it out two feet will give you an extra twenty square feet without needing to add support posts (cantilevered). Two feet may not seem like much, but it is enough room to allow you to add an island or a breakfast nook, and you dont have to pay more for additional HVAC ducts or wiring. You also dont need to extend roofing, as most bump outs are roofed like a carportwith a flat-roofed section.

The cost of adding a mudroom to your home is about $7,500 to $25,000. Build a 50-square foot mudroom for about $7,500 or a 100-square foot mudroom with a bathroom and shower for about $15,000.

Add a mudroom as a place to:

The cost of a two-foot cantilever addition is about $17,000. A cantilever is a micro-addition bump-out that juts out from your house without the benefit of a foundation. Its a cost-effective way to add up to two feet of width to your room. A cantilever is achieved by sistering new joists to the old joists. The new joists will jut out from the edge of the house, giving you a foundation, of sorts, to build your bump out on. The length they jut out depends upon the depth of the joist.

This formula allows for the safe execution of the bump out, being sure it will support itself and any humans who might sit in that spot. Check your local building codes for the proper formula for your area.

The cost of adding an outdoor balcony is $15 to $35 per square foot for wood or $3,600 for a small steel balcony. Posts must be anchored securely. Its an economical way to increase your living space without having to build a foundation or a roof, and a lovely way to enjoy the sunset or the breeze during hot summer days.

On average, it costs $2,000 to $7,000 for a small dormer and about $25,000 for a large one. Add more light, ventilation, space, views, and a possible emergency exit. Add in when your roof is replaced to save on costs. The steeper your existing roof, the lower the price of the dormer.

Adding a conservatory costs $665 to $1,210 per square foot. Usually used as a sunroom or greenhouse and built with a wood or aluminum frame, its a four-season room with roofing, wiring, foam sealing, double-paned windows, HVAC, fireproofing, and a protective coating. It will cost more to install if you live in a high-wind or snow-load climate.

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Many factors can increase the price of any home remodeling project by thousands of dollars. For example, the need for a new plumbing system, pouring a reinforced concrete slab, or landscaping around the new addition will add to your final cost.

The following construction costs to expand your house are based on adding a 278-square-foot bedroom or bathroom to your home.

Many people assume that it might be cheaper to build up to avoid laying a new foundation. Building up can cost a little less at $100 to $150 per square foot, but not always. Foundations are built to withstand a specific load, and building another story may require beefing up the foundation as well as the existing walls.

Each permit to build an addition will cost $100 to $300. Permits ensure that your addition will not go over the allowed impervious cover percentage on your lot, and inspections ensure the drainage around your home is functional, electrical and plumbing work is done to code, and you dont break any rules on the height of your house and fence.

When it comes to dealing with getting permits for a house addition, having a contractor is a godsend. Some permit approval has been known to hold things up by up to six or even twelve months, whereas a contractor can get the job done faster.

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Creating home addition plans is a major project and as such, will require the use of a general contractorunless you are experienced in all phases of construction and like to have a weekend project that will last for months.

A good general contractor will know which permits to obtain, and they will have subcontractors ready to work on the various parts of your addition. Things like electrical work, plumbing, and HVAC will need to be subcontracted. They may even subcontract the painting, roof, and concrete foundation work. A contractor will also be able to give input on your home addition ideas.

Home addition plans, blueprints, and architectural services can cost $1,000 to $3,000. Youll need to have a plan, so everyone on the building crew knows what their job entails.

Hiring an architect is the best idea to be sure the addition flows seamlessly into your existing home. While no building code says an architect must be hired, its good to hire one at the beginning of the project. An architect is trained in design and engineering.

Architects know how to solve problems with the design, flow, integration, the complication of roof lines, and making your existing home look like the addition has been there all along. If your architect isnt good, your contractor will charge more because of the shoddy work and communication. A good architect, on the other hand, can help increase your homes value with their designs.

The majority of additions add value and offer a 50% return on investment. Some types of home renovations will have a better return on investment than others. Generally,

Your home should still fit into the context of the neighborhood. If you live in an area with all one-story homes, adding a second floor to your home may not realize a good return. If you decide to sell your home, you need to keep the comparable prices of the surrounding area in mind. No matter how nice the addition to your home is, if its priced far above similar homes, you wont see as great of a return on investment.

Some things we do to our homes are just for us, with no thought for resale value, and thats okayour homes should be exactly the way we want them.

Before you begin any home addition, you must have a good understanding with your general contractor. Everything should be put down in writing with detailed line-by-line costs, and both parties should fully agree to the terms.

Its a normal thing to put a down-payment on a construction project and then to make payments along the way. Your contract with your general contractor will spell out when those payments are due, such as after framing is completed or three months into the project.

Keep in mind that unexpected costs will come up. Its impossible to know whats behind the walls or under the floor until those spaces are opened up and exposed to the light of day. There should be a contingency amount of money built into your contract, but even that could be exceeded.

There are many ways to save money on a home addition project. Even if youre not a handy, DIY kind of person, you can do things like preparing the site, clean up, haul away, or deliver to save on remodeling costs.

You can also save money by doing finish work like painting or sanding baseboards.

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You always want to hire the best contractors you can afford. This is your home they are working on, and you want it to be safe and right. Some things to keep in mind when hiring a contractor are,

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2019 Home Addition Costs | Cost To Add A Room Per Square Foot