How Much Does It Cost to Add a Bedroom and Bath in 2025?
Adding a bedroom and bathroom to your home costs an average of $103,300
Homeowners spend an average of $103,300 on this project, with most projects ranging between $37,500 and $117,000.
Costs vary depending on the size of the addition, the labor rates in your area, and the design complexity.
Hiring experienced professionals ensures expert installation and safety code compliance.
This article was updated using automation technology and thoroughly reviewed for accuracy by HomeAdvisor Editor Ryan Noonan.
Adding a primary bedroom and bathroom to your home not only enhances your living space but also significantly increases your property's value. Homeowners spend an average of $103,300 on this project, with costs ranging from $22,500 to $150,000, depending on the size, materials, labor rates, and design complexity. At an average of $160 per square foot, careful budgeting and hiring experienced professionals are essential to bring your vision to life.
Primary Suite Addition Cost per Square Foot
Primary suite additions cost an average of $160 per square foot, with rates ranging from $80 to $220 per square foot.
| Total Size (Square Feet) | Average Cost |
|---|---|
| 250 | $20,000–$55,000 |
| 300 | $24,000–$66,000 |
| 400 | $32,000–$88,000 |
| 460 | $36,800–$101,200 |
| 560 | $44,800–$123,200 |
| 600 | $48,000–$132,000 |
Adding a Bedroom and Bathroom Cost Factors
Adding a primary bedroom and bathroom as a suite averages $103,300, with costs ranging from $37,500 to $150,000. Factors like the size of the rooms, the quality of materials chosen, and the complexity of the design influence the total cost. Larger spaces with high-end finishes will be at the higher end of the range.
Cost to Add a Bathroom
Average costs per bathroom type and their accompanying features are as follows:
Powder room: $5,000 for a small space with a sink and toilet.
Half bathroom: $7,500, including a sink, toilet, and modest finishes.
Full bathroom: $10,000, featuring a sink, toilet, and shower or bathtub.
Luxury bathroom: Ranging from $15,000 to $30,000 or more, with high-end fixtures, premium materials, and custom features.
Labor
You’ll need to hire professionals to expertly install your new bedroom and bathroom and ensure compliance with building codes. Here’s an overview of what you can expect to pay.
General Contractor
Hiring a general contractor near you accounts for 10% to 25% of your overall project budget, averaging between $10,300 and $25,800. A general contractor manages all aspects of your addition, including planning, scheduling, hiring subcontractors, obtaining permits, and ensuring the work meets quality standards.
Structural Engineer
Structural engineers charge between 1% and 10% of the total project budget. They assess the foundation, framing, and load-bearing elements to ensure that your addition is safe and structurally sound.
Interior Designers
Interior decorator and interior designer services range from an average of $2,100 to $14,700.
Cost of Interior Finishes
Expect to pay these average costs for interior finishes in your new bedroom or bathroom.
Drywall and Paneling
Hanging drywall costs an average of $2,100. Costs vary based on the area’s size.
Installing Doors and Windows
Installing windows costs an average of $1,200 each, and installing interior doors costs an average of $800 each.
Flooring
Laying flooring costs an average of $3,200, but costs can vary widely depending on the type of flooring material you choose and the size of the area.
DIY vs. Hiring a Remodeling Pro
While minor updates like painting walls or replacing light fixtures can be DIY projects, adding a primary bedroom and bathroom is a complex undertaking that requires professional expertise. Hiring a contractor experienced in primary suite additions ensures the project is completed safely, complies with local building codes, and aligns with your vision for the space. Hire a professional home remodeling contractor to ensure your project is done right.
How HomeAdvisor Gets Its Cost Data
No place is more important than your home, which is why HomeAdvisor connects homeowners with local pros to transform their houses into homes they love. To help homeowners prepare for their next project, HomeAdvisor provides readers with accurate cost data and follows strict editorial guidelines. After a project is complete, we survey real customers about the costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Frequently Asked Questions
At $100 to $300 per square foot, building up often costs more than creating a primary suite on the first floor. This is especially true if you need to add a staircase and check that the existing foundation will support the weight of the addition. If you have enough space, you can keep costs down by converting the attic to a primary suite.
Building a primary suite offers a 63% return on investment. That means when you sell the home, you will recoup more than half of the money put into adding a primary bedroom and bathroom. If your bathroom was outdated, then it could sell for even more. Plus, the upgrades can help your home sell much faster.
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