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How much will your basement finishing or remodeling cost?

Ashburn, VA 20149

Basement Finishing Contractors on Thumbtack cost$5000 - $70000

National average price

103 Basement Finishing Contractors found near you!

  • Lowest price:$
  • Most common low price:$5000
  • Most common high price:$70000
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How much does a basement remodel cost?

The average cost of a basement remodel is $18,500, but costs range from $5,000 to $70,000. That said, unless you're adding in an elaborate home theater or building in separate rooms with high-end finishes, most homeowners report paying between $5,100 to $7,150 to renovate their basement.

Basement remodel cost:

National average cost $18,500
Typical cost range $5,100-$7,150
Low-end cost $5,000
High-end cost $70,000

A remodeled basement provides you additional living space, increases your home’s value and offers a great return on investment when it comes time to sell your home. To find out how much it will cost to remodel your basement, contact basement remodeling contractors near you for cost estimates.

Basement remodel cost factors

The average cost of basement remodeling varies based on the square footage of the basement space, if structural changes are needed, and if you're adding in elements such as electrical work for a kitchenette or plumbing for a half bath.

Virgil Miranda of Virgil Miranda’s Construction, says it can be tricky to estimate remodeling jobs based on square footage alone, due to the variance in each job. Larger basements may have a lower cost per square foot than tiny remodel jobs.

Other factors in cost include whether you have design plans already and what work you want done on the finishes such as trim and flooring.Here’s a breakdown of the various cost factors.

Lighting and electrical wiring

Installing electrical outlets and lighting in a standard basement can cost between $1,000-$1,500, on average, plus the cost of fixtures and switches. Because most lack natural light, basements require extra attention to lighting from artificial sources. This price can vary based on your zip code and the extent of the electrical work needed.


Installing a bathroom in a basement costs more than installing a bathroom above ground. Costs can range from $2,500-$5,000, on average, depending on the number of fixtures and whether the plumbing must be installed from scratch or if it’s roughed in already.

Basement plumbing requires special considerations to ensure proper drainage and tie-in with the main sewer line, which may not be deep enough to allow the basement bathroom plumbing to use gravity the way above-ground plumbing does.

Virgil Miranda’s Construction subcontracts all plumbing work. Miranda says that sometimes the toilet alone in a basement can cost up to $2,500 because sometimes homeowners need to invest in a toilet that does not use gravity but instead a macerating function to grind waste down to prevent clogging. He also estimates that each bathroom fixture in a basement costs $800 to $900, on average, so a full, three-piece bath could cost $3,000 for the fixtures alone.

Adding a kitchenette or wet bar sink adds more to overall remodeling costs. In addition, some basements require a French drain with one or more sump pumps, which can cost up to $10,000 on average, depending on how much ground the drain covers.

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If the basement space is open — without any separation of rooms — the contractor will need to do the interior framing necessary to define the rooms and spaces. A ballpark cost for framing in a 1,000-square foot basement is $1,000, but this can vary depending on the layout of the basement and any existing structural issues.


Flooring in a basement sometimes requires special consideration because of the below-ground location. Before the flooring goes down, the contractor may install a layer that acts as a moisture barrier, such as dimpled polyethylene. Carpet or vinyl flooring can cost about $1,500 for an average basement and hardwood can cost up to $4,000.

Doors and trim

Miranda of Virgil Miranda’s Construction says he typically charges $1.25 per linear square foot to install baseboards and trim and $125 per door, not including materials costs. Contractors will have varying prices depending on your zip code and the extent of the work you want done.

Building permits

You may need to obtain a city building permit and go through an inspection to ensure your basement remodeling project meets building code requirements. This is especially true if a bathroom or kitchenette is part of the project. Most contractors take care of pulling the permits and scheduling inspections, and add the cost to the final bill.

Basement remodeling types

There are several types of basement remodeling depending on the outcomes you want. Whether you have nothing but damp concrete walls and floors or you have a finished basement with painted walls, a pool table and a wet bar will determine the scope of work for your basement remodel and the cost. Here are some common basement remodeling projects homeowners take on and their related costs:

Basement finishing vs. remodeling

When it comes to basement remodels, the most costly way is to start with bare bones. If all you have is concrete walls and floors, you need to add framing, electrical, plumbing, flooring and trim. Basement finishing in a newer home that already has plumbing and electrical roughed in, a watertight foundation and some insulation installed — but no final finishes, like drywall or paint or carpet —usually costs less than remodeling an already finished basement. This is because when you already have a finished basement, the pros will need to do demolition at the beginning of the project, which can add $500 to $1,500 to overall costs.

In total, finishing a basement costs between $25 to $50 per square foot, on average, depending on how the basement is finished, whether any challenges come up or whether there are special circumstances with the project. For this reason, a 1,000-square-foot basement can cost up to $50,000 or more to finish.

Waterproofing and moisture control

Because basements are usually below ground level, water seepage and moisture issues have to be resolved before construction can start. Depending on how watertight the basement and foundation are, it may be necessary to protect the basement from future water damage after it’s finished, often through the installation of sump pumps. In total, basement waterproofing costs $500 to $3,500. Prior to creating a project bid, most contractors will inspect the area to check the interior floor and walls for dampness and make sure the exterior of the foundation is in good shape.

To help prevent moisture problems, homeowners can clear downspouts and gutters of debris to ensure that they help keep moisture away from the foundation.

Audio-visual and home theater installation

Basements converted into game rooms or home theaters may include special audio-visual features that will be part of the electrical finishing. These electrical additions can cost a few hundred dollars or a couple thousand, depending on the exact setup — not including the movie theater chairs, projector screen, and surround sound speakers. On average, installing a home theater costs $2,000 to $33,000.

Structural changes

Changing the weight-bearing features in your basement will usually increase the cost. It may also require you to obtain permits that prove you have architectural designs in place.

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How to hire a basement remodeling contractor

Hiring a contractor is the first step in your basement remodel. Unless you’re a qualified professional, taking on framing, electrical and plumbing work is not recommended. Here are steps to follow to find a trustworthy pro.

  • Read reviews. Start with someone whose clients love them. Look for reviews that include words like responsive, good communication, and honest
  • Look up the pro’s contractor’s license to verify they are in good standing with the state board. As an example, in California, search the California State Contractors Board to learn if the license is up to date, if they have any legal action against them and if the contractor is in good standing. Some states only require contractors licenses for residential projects based on price, so research your region to be safe. For more information on smart hiring, check out our safety tips.
  • Request quotes. Once you’ve narrowed down by reviews and confirmed they’re legit with their contractors license, invite 2-3 contractors to provide you a free estimate
  • Compare estimates. Factor in scope of work, materials being used, and company experience when choosing
  • Sign a contract. Outline all the details of the project and type and quantity of materials.
  • Pay a deposit. Typically a deposit is not more than 10 percent of total estimate

How to save money on a basement remodel

Sourcing supplies, clearing debris, and doing prep work can all help you save on basement costs. Consider what skills you have and talk with your contractor about what will shave money in each area. You may have the tools and strength to demo walls, which can save you several hundred dollars. Sourcing the materials for the pro takes this task off their labor time and saves you money.

Doing prep work and finish work is also a way to cut down on total cost. Painting the walls yourself at the end of the project could save you hundreds of dollars. Negotiate all these aspects before signing your contract.

Basement remodel benefits

Basement remodeling adds value to your home, increases your useable living space can protect your foundation from moisture damage, and looks great. Many homeowners remodel their basement to create space for an aging parent or to make room for more children. Another reason for basement remodeling is to create a rentable space that is separate from the rest of your home for a long-term renter or for short-term renting.

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Find basement remodeling contractors near you

Remodeling your basement is a big, time-consuming home improvement project. To ensure your project is done right, enlist a pro's help. Search for top-rated basement remodeling contractors near you, and ask for cost estimates today.

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