How much does a bump-out addition cost?
A bump-out addition generally costs between $110 and $260 per square foot, totaling $6,500 to $45,500 for labor and materials. The exact cost depends on the size, features, and foundation type. If the bump-out is for a bathroom or kitchen, the price can increase due to the need for plumbing and electrical work. These additions are a great way to expand living space without the expense of a full-scale home extension, offering a cost-effective solution for homeowners.
Cost Category | Increased Cost |
National Average Cost | $26,000 |
Minimum Cost | $2,210 |
Maximum Cost | $74,100 |
Average Range | $6,500 to $45,500 |
Bump-out Cost by Size
The table below provides an overview of the average cost for bump-out additions based on different sizes. Costs can increase further if the project involves adding or rerouting electrical, HVAC, or plumbing systems. Larger bump-out extensions also necessitate more extensive roofing and foundation work, driving up the overall price.
Room Size | Average Total Cost |
2’x10′ | $2,210 – $5,200 |
2’x15′ | $3,380 – $7,800 |
3’x10′ | $3,380 – $7,800 |
3’x15′ | $4,940 – $11,700 |
4’x10′ | $4,420 – $10,400 |
4’x15′ | $6,630 – $15,600 |
Cost to Bump Out a Room by Type
The cost of bumping out a room varies significantly depending on the room type and the complexity of the work required. Whether you’re expanding a kitchen, bathroom, bedroom, garage, or attic, the specific needs of each space can greatly influence the overall cost.
Kitchen Bump-Out
While most kitchen remodels typically range from $195 to $325 per square foot, a kitchen bump-out might cost slightly less if you’re not altering plumbing or electrical systems. Expanding the kitchen by just 2 feet could provide the extra space needed for an island, additional cabinetry, or a cozy breakfast nook. However, if the bump-out includes changes to utilities, the costs can increase significantly.
Bathroom Bump-Out
The cost of a bathroom bump-out largely depends on the modifications you plan to make. On average, bathroom remodels range from $156 to $357 per square foot. If the bump-out includes the installation of new fixtures or significant upgrades, expect costs to rise to the higher end of this spectrum. A simpler project, such as extending the space to accommodate a larger bathtub or shower, may be more cost-effective but still requires careful budgeting due to the potential for plumbing adjustments.
Bedroom Bump-Out
A bedroom bump-out typically costs between $104 and $195 per square foot. These projects are generally less expensive because they often don’t involve plumbing and may only require minimal electrical or HVAC work. However, adding luxury features like a large bay window or a custom closet can drive up the price. For instance, installing a new bay window can cost between $2,600 and $7,800, while building a custom closet ranges from $1,950 to $5,850.
Garage Bump-Out
A garage bump-out is often one of the most affordable types of room expansions, primarily due to the reduced need for interior finishing. Garage extensions typically cost between $78 and $156 per square foot, with bump-outs generally falling at the lower end of this range. This is because less demolition is required, and the existing roof structure often remains intact, minimizing labor costs.
Attic Bump-Out
An attic bump-out, often achieved through a dormer addition, costs between $117 and $195 per square foot. A dormer—a small, roofed extension projecting from a sloped roof—adds valuable space and light to an attic area. Dormers typically feature one or more windows, making them an attractive and functional addition, though the sloped nature of the roof can make construction more complex and costly.
Bump-Out Cost Estimator
When estimating the cost of a bump-out addition, two major factors come into play: the size of the addition and the type of foundational support required. Smaller bump-outs, which can often be cantilevered off the home’s existing foundation, tend to be less expensive. However, larger bump-outs typically cost more due to the need for a concrete foundation and footings to support the additional structure.
Key Factors Influencing Bump-Out Costs
Room Type
The type of room being extended significantly impacts the overall cost. Bumping out a kitchen or bathroom generally incurs higher expenses due to the complexity of adding or rerouting plumbing and electrical systems, as well as installing new fixtures or appliances. On the other hand, bumping out a living room or bedroom is usually less costly, as it often involves fewer technical upgrades. Garage bump-outs are often the least expensive, primarily because they require minimal interior finishing.
First Floor vs. Second Floor
A second-floor bump-out addition typically costs more than a first-floor extension. This is due to the additional time, labor, and safety measures required to ensure the structural integrity of the upper-level addition.
Features
The cost of a bump-out can also vary depending on the additional features you choose to include. These may range from installing new furniture, cabinets, and shelving to adding windows, wall coverings, or other aesthetic elements that enhance the functionality and appeal of the extended space.
Labor Costs for a Bump-Out Addition
Labor costs for a bump-out addition can vary significantly depending on the specific room you’re extending and the features you plan to include. Generally, a general contractor will charge between 10% to 20% of the total construction cost or an hourly rate of $65 to $195 to oversee and manage all aspects of the bump-out project.
Average Hourly Rates for Bump-Out Professionals
Here’s a breakdown of the average hourly rates for the professionals likely involved in your bump-out project:
Labor Type | Average Hourly Rate |
Architect | $130 – $325 |
Framing Carpenter | $26 – $78 |
Electrician | $65 – $169 |
Plumber | $58.50 – $195 |
- Demolition Costs: The cost for demolishing an exterior wall to expand the room outward typically ranges from $2 to $10 per square foot.
- Construction Permits: Obtaining the necessary permits for your bump-out addition can cost anywhere from $650 to $2,600, depending on the size and scope of the project. This process is usually handled by the general contractor.
Interior Finishing Costs for a Bump-Out Addition
The interior finishing costs for a bump-out addition can vary depending on the type of room being extended. Here are the average costs for common interior finishes:
Finish Type | Average Cost (Including Materials and Labor) |
Concrete Slab | $7.80 – $15.60 per square foot |
New Flooring | $7.80 – $13 per square foot |
Insulation | $1.30 – $6.50 per square foot |
Drywall Installation | $2.60 – $5.20 per square foot |
Room Painting | $1.30 – $3.90 per square foot |
Electrical Wiring | $5.20 – $11.70 per square foot |
Interior Trim | $5.20 – $13 per linear foot |
New Cabinets | $325 – $780 per box |
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Exterior Finishing Costs for a Bump-Out Addition
To ensure the bump-out addition seamlessly integrates with the existing structure, the following exterior finishing costs may apply:
Finish Type | Average Cost (Including Materials and Labor) |
Window Installation | $650 – $2,600 per window |
Siding | $5.20 – $16.90 per square foot |
New Roofing | $3.90 – $7.80 per square foot |
Exterior Painting | $1.30 – $5.20 per square foot |
New Landscape Installation / Planting | $19.50 – $58.50 per square foot |
Bump-Out Additional Cost Factors
Once you’ve determined the size and location of your bump-out addition, there are several other factors that will influence the overall cost. Making informed decisions on these aspects is crucial to managing your budget effectively.
Foundation
The type of foundation required for your bump-out will significantly affect costs. Factors like the size of the bump-out, soil conditions, building codes, and local regulations will dictate whether your addition needs a concrete slab, stem wall, piers and beams, or a crawl space. For larger bump-outs that can’t be cantilevered, a proper foundation is necessary. Foundation installation typically costs between $5.20 and $20.80 per square foot, but this can increase if extensive earthwork is needed or if the soil conditions are challenging.
Permits
Regardless of size, all bump-out additions require a building permit, with costs ranging from $600 to $3,770. Obtaining the necessary permit is essential to ensure your addition meets local codes and to avoid potential issues with insurance claims in the future.
Windows
Adding windows to your bump-out can enhance natural light and the overall appeal of the space. The cost for window installation varies between $750 and $1,950 per window, depending on the size, style, and type of window chosen. Larger picture windows, bay windows, and skylights tend to be more expensive.
Interior Bump-Out Finishing
To seamlessly integrate your bump-out with the rest of your home, you’ll likely want to match the existing wall and floor finishes. Interior finishing costs range from $2.60 to $7.80 per square foot for painting and $3.90 to $28.60 per square foot for flooring, depending on the materials used and the complexity of the work.
Exterior Bump-Out Finishing
To ensure your bump-out blends with the existing structure, exterior finishing is necessary. Siding installation typically costs between $3.90 and $14.30 per square foot. Additionally, if the roof needs to be extended to cover the new space, expect to pay $65 to $110 per running foot for roofing work.
Home Remodel vs. Bump-Out Addition
When deciding between a full home remodel and a bump-out addition, it’s essential to consider the costs, time commitment, and the amount of space gained.
Home Remodel
- Average Cost: $65,400
- Scope: Increases space and functionality throughout the entire home
- Timeline: Can take between 4 to 6 months to complete, depending on the extent of the remodel
Bump-Out Addition
- Average Cost: $35,100
- Scope: Adds space and functionality to a single room
- Timeline: Typically completed within 1 to 4 weeks
Cost to Add Bump-Out Addition by Pro
Adding a bump-out to your home is less extensive than a full remodel, but it still requires a team of skilled professionals to complete the job. Here’s a breakdown of the costs you can expect when hiring the necessary experts:
General Contractor
Hiring a general contractor is essential for managing the overall project, ensuring everything runs smoothly and meets local building codes. Typically, contractors charge a fee of about 10% to 20% of the total project cost, rather than an hourly rate, especially for larger projects like bump-out additions. This fee covers the coordination of all subcontractors and the management of the construction process.
Plumber
If your bump-out involves adding or relocating plumbing, such as for a bathroom or kitchen extension, you’ll need a plumber to handle the installation of supply and drain lines. The cost for a plumber typically ranges from $58.50 to $260 per hour, depending on the complexity of the work. On average, you can expect to spend between $1,950 and $7,930 for plumbing services for a bump-out that includes new fixtures.
Electrician
Additional electrical work is often necessary for bump-outs, especially if you’re adding new lighting, outlets, or a ceiling fan. Licensed electricians usually charge between $65 and $130 per hour. The total cost will depend on the extent of the electrical work needed and the size of the bump-out.
Does a Bump-Out Addition Increase Home Value?
A bump-out addition can indeed increase your home’s value by adding extra square footage and enhancing the functionality of key spaces like living rooms, offices, bathrooms, and kitchens. This added space not only improves the livability of your home but also boosts its curb appeal, making it more attractive to potential buyers. However, it’s important to note that while bump-outs do add value, they typically offer a return on investment (ROI) of between 30% and 50%, which is lower than some other types of home improvements.
Bump-Out Addition
A bump-out addition offers an affordable and effective way to expand your living space, enhancing both functionality and property value without the extensive costs associated with a full room addition. However, while it provides additional space, it may not be sufficient for all needs and could have some limitations.
Pros | Cons |
Lower cost than a full room addition | May cost more per square foot than a larger project |
Improves functionality of a specific space | Only increases the space in one room |
Typically does not require electrical or HVAC | May require plumbing and electrical work (especially for bathrooms and kitchens) |
Increased square footage | Loss of some yard space |
May not require extensive foundation work | Limited in the amount of space it can add |
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Questions to Ask
- How long have you been in business in this area?
- Are you licensed, bonded, and insured?
- What experience do you have with bump-out additions?
- How big can my bump-out addition be?
- What does this type of addition involve?
- What does the estimate include?
- What problems tend to come up during a project like this?
- How long will this bump-out project take?
- Can I live in the house during construction?
- Do you handle all the required permits and inspections?
FAQs
A bump-out addition typically costs between $110 and $260 per square foot, totaling anywhere from $6,500 to $45,500 for both labor and materials. The exact cost will depend on the size of the bump-out, the type of features you want to include, and the foundation requirements. For example, if the bump-out is for a bathroom or kitchen, the cost can increase due to the need for additional plumbing and electrical work. Bump-outs offer a cost-effective solution to expand living space without the expense of a full-scale home extension.
The national average cost for a bump-out addition is approximately $26,000. However, the cost can vary widely depending on factors such as the room type, the complexity of the project, and regional labor rates. The minimum cost for a basic bump-out might be around $2,210, while a more complex or larger bump-out could reach up to $74,100. The average cost range for most bump-out additions falls between $6,500 and $45,500.
The cost of a bump-out addition varies significantly by size. For example:
- A 2’x10′ bump-out might cost between $2,210 and $5,200.
- A 2’x15′ bump-out could range from $3,380 to $7,800.
- Larger bump-outs like a 4’x15′ could cost between $6,630 and $15,600.
Larger bump-outs require more extensive roofing, foundation work, and potentially adding or rerouting electrical, HVAC, or plumbing systems, all of which drive up the overall cost.
The cost of a bump-out addition varies depending on the room type and the complexity of the work required. For example:
- Kitchen Bump-Out: Costs might range from $195 to $325 per square foot, especially if plumbing or electrical systems need modification.
- Bathroom Bump-Out: Costs range from $156 to $357 per square foot, depending on the scope of the modifications.
- Bedroom Bump-Out: Typically costs between $104 and $195 per square foot.
- Garage Bump-Out: Usually more affordable, ranging from $78 to $156 per square foot.
- Attic Bump-Out: Costs range from $117 to $195 per square foot, often involving a dormer addition.
Each room type has unique requirements that influence the total cost of the bump-out.
Several factors influence the cost of a bump-out addition, including:
- Room Type: Kitchens and bathrooms tend to cost more due to plumbing and electrical work.
- First Floor vs. Second Floor: Second-floor bump-outs typically cost more due to the added complexity and structural support needed.
- Features: Adding luxury features, such as custom cabinets, windows, or specialized lighting, can increase costs.
- Labor Costs: General contractors typically charge 10% to 20% of the total construction cost, or between $65 and $195 per hour, depending on the project scope.
Labor costs for a bump-out addition vary depending on the specific room and features included. For instance:
- Architects: $130 – $325 per hour.
- Framing Carpenters: $26 – $78 per hour.
- Electricians: $65 – $169 per hour.
- Plumbers: $58.50 – $195 per hour.
These professionals are crucial for ensuring the project is completed to code and meets all safety standards.
Yes, a bump-out addition can increase your home’s value by adding extra square footage and improving the functionality of key areas like kitchens, bathrooms, or living spaces. However, the return on investment (ROI) for bump-outs typically ranges between 30% and 50%, which is lower than some other types of home improvements. While bump-outs add value and enhance the livability of your home, the overall ROI depends on the quality of the work and the local real estate market.
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Process To Get a Bump-Out Addition Cost Estimate Report
Here I am going to share some steps to get a bump-out addition cost estimate report.
