How Much Does It Cost to Add a Bedroom and Bath in Denver, CO? [2026 Data]

Adding a bedroom and bathroom in Denver, CO, costs an average of $109,291, with most homeowners spending between $39,675 and $123,786. Costs vary based on the size of the addition, the quality of finishes, site conditions, and whether major plumbing, electrical, or HVAC upgrades are needed. 

The competitive housing market in Denver, CO, has many homeowners looking for ways to add living space without moving. Whether you need an extra bedroom for a growing family, a guest suite, or a private space for multigenerational living, understanding the cost to add a bedroom and bath in Denver, CO, is an important first step. Local labor rates, permitting requirements, and project scope all play a role in determining the final price.

Bedroom and Bath Addition Cost Factors 

The cost of adding a bedroom and bathroom in Denver, CO, depends on several factors, including the size of the new bedroom, the type of en suite bathroom, and the materials you choose for finishes and fixtures. Demolition, site preparation, structural modifications, and utility connections can also account for a significant portion of the project budget, especially in older homes.

Bedroom Size

A bedroom and bathroom addition costs an average of $170 per square foot. This rate can range from $85 to $235 per square foot, depending on the features you include and the finishes and materials you choose.

The footprint of a primary bedroom alone can range from 200 to 400 square feet. A primary bathroom can add another 50 to 200 square feet on top of that. Larger additions require higher material and labor costs, as detailed in the table below.

Type of En Suite Bathroom

Bathrooms are far more expensive to build on average than bedrooms, so expect the cost to add a bathroom to take up the majority of your project budget. If you're planning an en suite, understanding what an en suite bathroom is can help you determine which layout best fits your needs.

Your costs will vary significantly depending on the type of bathroom you want for your addition, as well as factors such as standard master bathroom sizes. Costs per bathroom type in Denver, CO, break down as follows:

Materials

A primary bedroom requires a wide range of materials, from lumber for framing and support to a concrete foundation, siding, roofing, drywall, paint, doors, windows, electrical and plumbing equipment, and flooring. Expect to pay anywhere from $10,600 to $105,800 on materials alone, or $42,300 on average.

Demolition and Prep

Before construction can begin on your new bedroom and bathroom addition, the space must be completely cleared of landscaping features. Expect demolition and prep to cost between $1.40 and $2.10 per square foot.

Home Addition Pro Costs

The cost of hiring a home addition pro in Denver, CO, includes more than labor alone. Your total project budget may also include permits and inspections, licensing and insurance costs, sales tax, and general contractor or project management fees that help keep the addition on schedule and compliant with local building codes.

Labor

Home addition labor in Denver, CO, costs $55 to $105 per hour for skilled trades, while labor often accounts for 40% to 60% of a bedroom and bathroom addition budget. Project complexity, structural work, and utility connections all affect labor costs, as does how long an addition takes to complete.

Permits and Inspections

Denver, CO, homeowners can expect to spend $1,300 to $2,100 on permits and inspections for a bedroom and bathroom addition. Costs vary based on project scope, structural modifications, electrical work, plumbing work, and local review requirements.

Licensing, Insurance, and Certification

Licensed and insured contractors build these costs into their project pricing rather than charging them as separate line items. In Denver, CO, contractor overhead and compliance expenses often account for 10% to 20% of total project costs.

Sales Tax

Denver, CO homeowners pay around 3% state sales tax plus local taxes on applicable materials. Combined sales tax rates total close to 9%, which can add several thousand dollars to larger bedroom and bathroom additions.

Project Management and General Contractor Fees

General contractors coordinate scheduling, subcontractors, inspections, and material deliveries. Most Denver, CO, contractors charge 10% to 20% of the total project cost for project management and oversight, though some include these fees within a fixed-price contract.

Additional Pros to Consider Hiring

In addition to a general contractor, several specialized professionals may be needed to design, engineer, and complete a bedroom and bathroom addition in Denver, CO.

• Architect: Denver, CO, architects charge $115 to $265 per hour or 5% to 20% of total construction costs. If you're wondering whether you need an architect for an addition, they can create plans, optimize layouts, prepare permit drawings, and help ensure compliance with local building codes.

• Structural Engineer: Structural engineers in Denver, CO, charge $105 to $210 per hour, with most homeowners spending $600 to $2,100 per project. They evaluate foundations, load-bearing walls, roof systems, and framing plans to ensure the new addition is structurally sound.

• Plumber: Denver, CO, plumbers charge $85 to $160 per hour for residential work. They install water supply lines, drain pipes, fixtures, shower and tub connections, and may relocate existing plumbing to accommodate the new bathroom.

• Electrician: Electricians in Denver, CO, charge $65 to $130 per hour. Common tasks include installing wiring, outlets, lighting, exhaust fans, dedicated circuits, and electrical panel upgrades needed to support the bedroom and bathroom addition.

Does Adding a Bedroom and Bath Increase Home Value?

A bedroom and bathroom addition can make a Denver, CO, home more comfortable to live in while also improving its marketability. For homeowners wondering whether adding a bedroom increases home value, these projects often deliver measurable returns, even though they don't recoup their full construction costs. A primary suite addition has a 54% return on investment (ROI), while a bathroom addition delivers a 56% ROI.

In Denver, CO's competitive housing market, additional living space and private bathroom access can help a property stand out to prospective buyers. A new bedroom and bathroom can improve a home's layout, increase functionality for growing households, and create a more balanced bedroom-to-bathroom ratio. Primary suite additions also earned a perfect homeowner satisfaction rating in industry research, highlighting the value homeowners place on both the financial and lifestyle benefits of these upgrades.

How Angi Gets Its Local Cost Data 

To help homeowners plan their next project, Angi provides readers with carefully researched cost data and upholds strict editorial standards. We start with national average project costs, which we collect by analyzing competitor information, retailer material costs, and input from professional contractors. We then apply local price index data to calculate location-specific estimates that reflect what homeowners typically pay in their local area. To do that, we use data from the U.S. Bureau of Economic Analysis (BEA), including its Regional Price Parities (RPPs), which measure price differences across cities. This helps us account for differences in labor, materials, and overall cost of living, so estimates in higher- or lower-cost areas better reflect real-world local pricing.

Every estimate undergoes a thorough editorial review to verify accuracy, consistency, and alignment with observed market conditions.

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