How Much Does a Bedroom Addition Cost? [2025 Data]

This article was created using automation technology and thoroughly fact-checked and edited by an Angi Editor in accordance with our AI policy.

Average bedroom addition costs range from $20,000 to $130,000, with a national average of $50,000. Most projects cost $100 to $500 per square foot, depending on size, finishes, and complexity. Understanding these costs helps you plan your budget and avoid surprises.

Adding a bedroom can make your home more functional and appealing, but it’s important to know the range of expenses involved. Labor accounts for 40% to 60% of the total cost, so choosing how much work to do yourself versus hiring a pro can impact your bottom line.

Bedroom Addition Cost Factors

A bedroom addition includes more than just building walls and a roof. Your total bedroom addition cost covers materials, labor, design fees, permits, site preparation, and HVAC connections. The final price depends on the scope and complexity.

Cost by Component

Construction expenses make up the largest share, including framing, roofing, insulation, drywall, and flooring. Systems like HVAC and electrical add to the total, especially if you’re expanding or upgrading. 

Customization, accessibility, and energy-efficient upgrades can all drive costs higher, while choosing standard layouts and finishes can help keep expenses in check.

Size

The size of your new bedroom is one of the biggest factors affecting total bedroom addition cost, with prices ranging from $100 to $500 per square foot. Larger spaces require more materials and labor, and may need additional structural support or utility upgrades. Custom or oversized bedrooms with luxury finishes or en suite bathrooms will cost more.

Common bedroom sizes include:

• Small bedroom: 100 to 150 square feet

• Standard bedroom: 150 to 250 square feet

• Master suite: 250 to 400 or more square feet

Labor

Labor costs make up 40% to 60% of your project total. Several professionals are involved in a bedroom addition project, each bringing specialized skills. The main roles include:

• General contractor: Oversees the entire project, coordinates trades, and manages schedules. Fees range from 10% to 20% of the total project cost.

• Architect: Creates plans, ensures code compliance, and helps with permits. Design fees range from $4 to $12 per square foot, or $100 to $250 per hour, depending on complexity.

• Electrician: Handles all wiring, outlets, lighting, and code requirements. Expect to pay $50 to $130 per hour for electrical work.

Labor rates vary by region and demand. It’s best to hire a general contractor for complex additions, but you may only need an electrician or designer for smaller or simpler builds. To save on pro costs, request multiple bids and consider handling some finishing tasks yourself.

Additional Pros to Consider Hiring

Depending on your project’s needs, you may also need to hire:

• Plumber: If you’re adding a bathroom or sink, plumbing installation can cost $45 to $200 per hour.

• Structural engineer: For major changes to load-bearing walls or foundations, expect to pay $70 to $250 per hour for an assessment.

• Interior designer: For help with space planning and finishes, a designer’s fees range from $100 to $500 per hour.

• Landscaper: Restoring the exterior after construction can cost $50 to $100 per hour, depending on the extent of work.

Each of these pros is necessary when your bedroom addition involves their area of expertise, such as moving plumbing, reconfiguring HVAC, or making major structural changes.

Location

Geographic location plays a big role in bedroom addition cost. Urban areas and regions with higher labor and material prices will have higher overall costs. Local building codes and permit fees also impact your total.

For example, costs are highest in the Northeast and West Coast, while the Midwest and South often see lower averages. Permit fees and inspection requirements vary widely, so always check your city or county’s regulations.

Additional Cost Factors

Bedroom addition projects often come with additional costs beyond construction and finishes. Taxes and local fees can add to your final bill. Some homeowners need upgraded homeowners' insurance, which may increase annual premiums.

Warranties for workmanship or materials can provide peace of mind but may come with added cost. Special features such as built-in storage, smart home technology, or energy-efficient upgrades also impact the bottom line. ADA compliance or accessibility improvements, such as wider doors or ramps, will add to the total. Repairs to existing structures uncovered during construction, and post-construction cleanup, should also be included in your budget.

Demolition and Prep

If your project requires demolishing an existing structure—like a porch, deck, or garage—this will increase your total bedroom addition cost. Demolition and site preparation can cost $1,000 to $5,000, depending on the size and complexity. Removing debris, grading the lot, and preparing the foundation all contribute to prep expenses. Always confirm whether demolition is included in your contractor’s estimate to avoid surprises.

Permits

Bedroom additions almost always require multiple permits, including building, electrical, plumbing, and zoning approvals. Your contractor often handles permitting, but homeowners are ultimately responsible for ensuring all paperwork is in order. Permit costs range from $250 to $2,000 based on your location and project scope. Skipping permits can lead to fines, work stoppages, or problems selling your home in the future.

DIY Bedroom Addition vs. Hiring a Pro

Some homeowners consider taking the do-it-yourself route to save on labor. DIY bedroom additions cost less in direct labor, but require advanced skills, significant time, and specialized tools. Materials alone can run $10,000 to $30,000 for a small addition, but you will need to budget for equipment rentals and possible corrections if work is not up to code.

A full DIY build might save on labor, but comes with risks: code violations, safety hazards, and potential insurance issues. Most projects require permits and inspections, which must be passed even if you do the work yourself. Partial DIY—such as painting or installing flooring—can reduce costs without sacrificing quality or safety.

Bedroom Addition Remodel vs. Renovate

Remodeling means building a new addition or physically expanding your home, while renovating updates or improves an existing bedroom. Remodeling is more expensive, as it involves new construction, permits, and possibly changes to your home’s structure.

Renovating is often less costly, as it focuses on new finishes, better insulation, or added storage. For example, renovating a bedroom might cost $3,000 to $10,000, while building a new bedroom addition ranges from $20,000 to $130,000 on average. Consider your goals, the disruption to your home, and the potential return on investment when choosing between renovation and remodeling.

Tips to Reduce Costs While Adding a Bedroom

Consider these cost-saving strategies to make your bedroom addition project more budget-friendly:

• Choose standard sizes and layouts to minimize custom work.

• Source mid-range materials for finishes and flooring.

• Get multiple quotes from licensed local home addition contractors to compare rates.

• Complete some finishing work (painting, trim) yourself.

• Plan for future upgrades instead of all at once.

• Avoid moving major systems (plumbing, HVAC) if possible.

• Consider prefab or modular bedroom addition options.

• Schedule construction during off-peak seasons for better rates.

Does a Bedroom Addition Increase Home Value?

Adding a bedroom often increases your home’s resale value and appeal, especially in markets where extra bedrooms are in demand. Homeowners can see a return on investment (ROI) of 50% to 75%, depending on local market conditions and the quality of work.

Other factors that influence added value include location, the number of bedrooms, and the overall quality and design of the addition. A well-designed bedroom addition enhances functionality and makes your property more attractive to buyers. To maximize ROI, focus on a design that fits your home, secure all necessary permits, and consider energy-efficient upgrades and curb appeal improvements.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on 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. 

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