Foundation repair costs depend on your project and location. Check with a local pro for your specific job.
On average, laying a foundation costs between $7 and $53 per square foot in Washington, D.C.
Washington, D.C., sees above-average rainfall, so consider budgeting extra for foundation waterproofing services.
Labor costs for foundation installation are above-average in the area due to a high cost of living, which is 43% above the national average.
Don’t forget to budget for permits, which add an average of $288 to your total in Washington, D.C.
The average cost to build a foundation in Washington, D.C., is $14,822, and most residents pay somewhere between $8,975 and $21,119. Your costs will vary based on your home’s footprint and the type of foundation you want. Basements, the most expensive type of foundation to install, are prevalent throughout D.C., so the average cost of a foundation in the area is well above the national average.
D.C. homeowners could pay as low as $5,000 to install a simple slab foundation in Washington, D.C., but prices can climb to $40,000 or beyond if you have an oversized home or you want a basement foundation. Make sure you consider the following cost factors when budgeting.
Most foundation contractors charge by the square foot, which means larger foundations will almost always drive costs higher. On average, laying a foundation costs between $7 and $53 per square foot, so most homeowners pay anywhere between $7,000 and $53,000 for a 1,000 square foot foundation.
The average home in Washington, D.C., is just over 1,200 square feet with a foundation between 600 and 1,200 square feet. That means foundation costs for an average-sized house usually fall between $4,200 and $63,600.
| Square Footage | Average Cost Range |
|---|---|
| 1000 | $7,000–$53,000 |
| 1200 | $8,400–$63,600 |
| 1500 | $10,500–$79,500 |
| 2000 | $14,000–$106,000 |
| 2500 | $17,500–$132,500 |
| 3000 | $21,000–$159,000 |
The material you’ll need for a foundation project will affect its cost. You’ll pay more in material for a basement foundation than a monolithic slab, as basements require bigger molds and more concrete. Besides foundation type, other material costs you’ll need to consider are waterproofing, insulation, and a drainage system. Drainage systems are especially useful in D.C., as much of the city is in a flood plain, and the area sees above-average precipitation.
The type of foundation plays an equally important role in your foundation costs. Slab foundations are the most affordable but aren’t very common in Washington, D.C. Most of the historical homes have “English basements,” and basements are the most expensive to install. This is one key reason why foundation costs in Washington, D.C., are well above the national average.
Below are the different types of foundations and what they could cost.
A concrete slab costs between $7,400 and $30,000, based on the size and project. Slab foundations aren’t very common in D.C., but if you do go this route, the area, soil type, and structural needs will dictate which type you need.
A monolithic concrete slab costs between $7,500 and $18,600. This is quicker and easier than laying other foundations, so it brings your labor costs down considerably. However, it won’t work unless the ground is level throughout your property and the soil is well-compacted. For areas requiring builds to rise above a floodplain, particularly those immediately around the Tidal Basin, it’s not a good choice.
You can expect to pay between $10,000 and $30,000 for a stem wall foundation. More excavation, materials, and labor are involved, so they carry a higher price tag than a monolithic concrete slab.
Also known as post and pier foundations, pier and beam concrete foundations cost an average of between $11,400 and $21,500, or between $8.50 and $17 per square foot, with a steel l-beam cost at the higher end of this range. These foundations raise your home above the ground, making it a popular option where flooding and moisture are risks.
| Pier and Beam Foundations | Average Cost |
|---|---|
| Concrete Foundation Piers | $1,400 |
| Wood Beams | $1,400–$4,300 |
| Steel Beams | $2,100–$7,150 |
Piles cost between $28.50 and $86 per linear foot, with an average minimum cost of $40,000. These are good when the soil isn’t fit to support a concrete foundation, which isn’t usually an issue in Washington, D.C. Pile foundation prices vary by material:
| Pile Material | Cost per Linear Foot |
|---|---|
| Wood | $18–$29 |
| Concrete | $43–$85 |
| Steel (hollow) | $28–$57 |
| Steel (concrete-filled) | $35–$64 |
Pouring a basement concrete foundation costs anywhere from $34,000 to $212,000. The price depends on the type of basement foundation you need and the size of your project. While basements are, by far, the most expensive foundation type, they’re also the most common in Washington, D.C., so they’re often worth the added cost.
Here are some factors that will affect the price of a basement foundation:
Waterproofing and drainage systems are important for keeping your basement hangout space dry.
Finishing the basement costs a lot more than leaving it unfinished, but it improves your home’s resale value.
Doors and windows are something to consider, as you’ll need exit windows for code compliance.
| Type of Basement Foundation | Average Cost |
|---|---|
| Full Basement | $34,000–$71,500 |
| Walkout Basement | $53,000–$144,500 |
| Added to Existing Home | $54,400–$212,000 |
Crawl space foundations cost an average of $14,300 in Washington, D.C., but they can approach $28,600 for bigger projects. Crawl spaces don’t provide added living space like basements, so they’re less desirable, in general, although they are significantly less expensive because they require less excavation.
A garage foundation costs between $2,900 and $10,000, on average, and the exact total depends on if you need a one-, two-, or three-car garage built. It can be worth the investment since it can add to your resale value.
A poured concrete foundation for a 10-by-16-foot shed will cost an average of $1,400. You may opt for a gravel pad for your shed instead, which will cost between $285 and $430 for a 10-by-16-foot shed.
A block foundation is one that’s made of stacked cinder blocks cemented using mortar and reinforced with rebar. Rather than a standalone foundation style, it’s a type of construction common in crawl spaces and basements. On average, homeowners in Washington, D.C., spend $16,500 to $27,200 or $13 to $21.50 per square foot on this foundation.
When you hire a foundation company in Washington, D.C., an average of between $5,900 and $8,900 will go toward labor, which means it accounts for 40% to 60% of your total. Labor charges will be higher for more complicated installations for basements and crawl spaces that require excavation. Labor costs in D.C. are above the national average for all foundation styles, as the local cost of living is 43% higher than the national average.
Aside from materials and labor, you’ll also need to budget for permit fees, as Washington, D.C., requires building permits for all foundation installations. New construction permits cost $0.03 per cubic foot of living space. With the average home size of 1,200 square feet and the typical ceiling height of 8 feet, you’re looking at permit fees averaging $288. It’s possible to get a foundation-only permit for $130, but all-inclusive building permits are more common.
If you’re installing a foundation as part of a new construction project, the foundation will absolutely contribute to the total home value, with basements generally adding the most and slabs adding the least value.
If you’ve had a foundation inspection done recently and found structural issues, replacing your foundation is an expensive project, but it’s one that will dramatically improve value. Most buyers will offer less for a home with foundation damage due to the uncertainty, so a complete replacement will avoid a dip in value. In the case of a full replacement, a basement foundation will often provide the best return on investment (ROI) in Washington, D.C.
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 survey real Angi customers about their project 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.
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I recently had the pleasure of working with Oswaldo and his team for a foundation repair project, and I couldn't be more impressed with the service they provided. From the moment they arrived at the job site, Oswaldo displayed exceptional professionalism and expertise. He quickly assessed the...
NV Waterproofing & Foundation RepairCompetent and agile team of workers and objective advise on repair needed.
Louise AugustWe are a property manager in Washington DC and have engaged AVEC Construction for multiple projects revolving around masonry repair work. This particular project they repaired brick masonry where a home had a leak getting in from the exterior. They also repaired the patio, it looks great....
Avec Construction IncTheir service was excellent they are very professional, explain your issues and let you know how it will be repaired and the prices are reasonable.
Harris ElectricHe was honest in the assessment of the repair and cost and recommended I buy a new one. I appreciated his expertise.
A.G.B Appliance RepairSept. 15th 2023 Repair work was done to an area of my porch roof that was rotting. The work was performed very professionally and you can't tell there was ever a problem. They also painted the repair area, porch columns and installed two new down spouts at a very fair price.
Louise AugustThey reconstructed a closet (excellent job), reinstalled a damaged bamboo floor, and repainted an entire room after I had my foundation reinforced, which left the mess this company fixed.
Quest 1 Construction & RemodelingStill waiting for rain to test the roof repair
I. Boyd Home ImprovementsPatrick brought in an amazing crew to repair cracks in my back wall and steps. They were able to match the color perfectly, fixed several things along the way and quite frankly think it’s better now than when it was first built. Definitely great value and quality!
Capitol Hill MasonryMr. Hall is professional and I am very impressed how he was able to repair my steel staircase and rusted handrails. He was referred to me by my neighbor!!! If you want quality and fast service! Contact Hall’s Welding Repair.
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