How Much Does a Primary Bedroom Addition Cost?

Audrey Bruno
Written by Audrey Bruno
Updated January 11, 2022
Primary/master bedroom with doors to balcony
Photo: Rick Gomez / Getty Images

The national average cost to add a primary suite to a home is $62,500

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Between having more space and increasing your home’s resale value, there are plenty of reasons to consider adding a primary bedroom and bathroom to your house. After all, who doesn’t want to be able to jump straight from the bed to the tub? 

Before making the leap, we’ve compiled all the necessary information to help you determine if the extra costs fit into your budget.

How Much Does It Cost to Build a Primary Bedroom and Bath per Square Foot?

On average, primary bedroom additions cost around $140 per square foot, but the price can range from $80 to $200 per square foot, depending on the included features and materials. Here’s what you can expect for a handful of different suite sizes:

Average Primary Bedroom Addition Cost per Square Foot

Square FootageAverage Cost
250 sq. ft.$35,000
300 sq. ft.$42,000
400 sq. ft.$56,000
460 sq. ft.$64,400
560 sq. ft.$78,400
600 sq. ft.$84,000

How Much Does A Primary Bedroom Addition Cost Near You?

Primary suite addition costs vary from state to state,  just as home prices do. See the list below for a quick summary of what to expect:

Average Cost to Add a Primary Bedroom and Bathroom Per State

LocationAverage Cost
New York$69,200

What Primary Suite Addition Can I Get on My Budget?

Primary bedroom and bathroom additions are possible with most budgets, but, depending on how much you’re looking to spend, it might be necessary to adjust your plan to stay within your means.


For this price, you can afford to add a primary bedroom and bathroom under 250 square feet total. You’ll also have to make concessions on the types of materials used and any additional features included.

$25,000 to $50,000

This budget will allow you to add a primary suite between 250 and 400 square feet in size. The larger the addition, the more compromises you’ll have to make on materials and extra features. So you might have to leave that dream of heated bathroom floors behind.

$50,000 to $75,000

In this price range, anything from a 400- to 500-square foot primary suite addition is possible. Opting for a room on the smaller side will make it possible to invest in high-end finishes such as French doors and marble bathroom countertops.

$75,000 to $100,000

For this amount, it’s possible to build a primary bedroom and bathroom that’s 600 square feet or more with most (if not all) of the accommodations you want. Hello, dream room!

How Much Does It Cost to Add a Primary Bedroom Yourself?

Because labor fees make up 30% to 50% of the overall home addition cost, it can be considerably cheaper to do it yourself—even as low as $12,000 to $50,000

But doing it on your own can quickly turn into a full-time job—one that you’re not necessarily equipped to tackle solo. 

Though you may be an expert at painting walls and laying down floors, hiring professional plumbers, technicians, and contractors is a great way to avoid any expensive mistakes. In general, you’ll pay less to fix damages in the long run if you recruit the help of a local contractor to ensure everything is properly built from the start.

What Factors Influence the Cost to Build a Primary Bedroom?

Because adding a new room to your home is no small undertaking, there are a lot of factors that affect the overall cost. These include the materials you’re using to build the walls, roofs, and ceilings, as well as the floor you’re laying down, the bathroom amenities you’re featuring, and any additional accessories that will make you feel most comfortable. 

Think—electrical outlets next to the bed, bookshelves built into the wall, and shower-and-tub combos, just to name a few. And, of course, the professional services you hire will make up most of your final bill.

Large contemporary primary bedroom
Photo: LOOK Photography / Getty Images

Primary Bedroom Addition Cost Breakdown

There are many factors that determine the cost of a primary bedroom addition, including size, materials used, design elements, plumbing fixtures, and professional services.

Cost Per Square Foot

The larger your addition is, the more it costs to build. Most primary bedrooms and bathrooms will be between 200 and 600 square feet in size, and the cost for each square foot can range from $80 to $200, depending on how they’re built.

Cost for Materials

There are a lot of materials that go into a home addition as big as a primary suite. Here’s what you should expect to pay per item:

Bathtubs and Showers

Bathtub prices range from $600 to $14,000 depending on style. The cost for a shower can be anywhere between $4,200 and $8,500.

Support Beams, Roof Trusses, and Foundation

Every new home addition requires a stable foundation, which can cost between $5,200 and $30,000 to build. Roof trusses cost $3 and $4.50 per foot, and support beams will be between $6 and $20 per foot.


If your primary bedroom is on the top floor, you’ll need to factor the cost of roofing into your final estimate. Asphalt shingles and galvanized metal flashing cost $80 to $100 per square foot. Steel roofing prices are between $75 and $350 per square, whereas slate shingles are more costly—around $200 to $600 per square. 

Crown molding is another essential element and can cost between $1 and $40 per linear foot, depending on the material.

Ceilings and Drywall

Drywall for ceilings and walls will cost approximately $0.50 to $0.75 per square foot.


Unless you’re planning on an open layout, it’s likely that you’ll need at least one door for your home addition. Doors can cost anywhere from $40 to $2000.


There are many types of flooring to choose from, and almost always one that will fit into your budget. Hardwood is on the higher end at $3 to $14 per square foot, whereas vinyl and linoleum are on the lower side at $0.50 to $5.00. In the end, it’s all about your budget and personal preference.

Electrical Outlets

Basic bedroom outlets will cost between $3 to $50 each. Any outlets in the bathroom will need to be ground fault circuit interrupter (GFCI) receptacles to ensure safety. These are a bit more expensive, at $7 to $25 each.

Labor Costs

While it’s technically possible to build a primary bedroom on your own, the process is much easier with the help of experts. Here’s what you can expect to pay for professional services:

Architectural Services

Hiring a local architect can cost between $2,020 and $8,300, depending on the size of your addition.

General Contractors

The cost to hire general contractors near you will generally be about 10 to 25 percent of the total price for the addition. Expect it to be between $6,250 and $15,600 altogether.

Preparation and Excavation

The land and space you’re going to build upon needs to be completely cleared before construction can begin. These services cost about $1.30 to $2.00 per square foot.

Structural Engineers

Most structural engineers charge $100 to $150 per hour or a flat rate of 8 percent of the total project. Expect to pay a local pro between $200 and $1,300.


It costs between $75 to $485 to hire a local electrician to install each electrical outlet. In some cases they may offer a flat rate of $630 for two or three outlets. Installing lighting will be between $150 and $825 per fixture.


The cost to hire a plumber near you for installing a bathtub or shower will be between $1,400 and $7,000, not including the cost for the materials. Sink installations will cost between $200 and $600.

Interior Designers

While not necessary to complete the project, hiring an interior designer near you can be a great way to jazz up your new primary suite. Expect to pay between $2,000 and $11,000 for their services.

FAQs About Adding a Primary Bedroom

Primary bedroom with floor-to-ceiling windows and a love seat
Photo: Fernando Bengoechea / Getty Images

How much does it cost to convert a dining room into a bedroom?

If building an entirely new addition is out of your reach, converting a dining room into a bedroom is far cheaper—it will be $1,900 to $4,600 on average.

Is it cheaper to remodel or renovate a pre-existing bedroom than build an addition?

Renovating an existing bedroom is also cheaper to do than building an addition. In general, the most you can expect to pay is $31,000.

Can building a primary bedroom and bathroom increase the value of my home?

Though building an addition is undeniably pricey, it’s likely to increase the overall value of your home by 63%.

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