Basement Waterproofing cost in Washington, DC
Washington, DC · updated August 2026
$10,200
Typical local cost
$3,700 – $22,500
Typical range
- per linear foot of drain installed
- $50 – $200
- Permit
- It depends
- Typical timeline
- 2-5 days of work
Installed, local pricing
$0 – $520 in fees
2-5 days of work
Washington runs +25% against the U.S. average · data confidence Medium · modeled estimate, not a quote
The modeled midpoint for Washington is $10,200. The local adjustment for this trade is x1.249 — driven mainly by District of Columbia labor rates and 20% exposure to local code requirements.
Cost by project size
Generated from the same unit pricing the calculator uses.
| Project size | Estimated range |
|---|---|
| 45 linear foot of drain installed | $2,300 – $9,000 |
| 60 linear foot of drain installed | $3,000 – $12,000 |
| 75 linear foot of drain installed | $3,800 – $15,000 |
| 100 linear foot of drain installed | $5,000 – $20,000 |
| 130 linear foot of drain installed | $6,500 – $26,000 |
Based on Washington pricing of $50–$200 per linear foot of drain installed.
Where the money goes
- Labor
- $5,600
- 54% of median
- Materials
- $4,600
- 44% of median
- Permit & fees
- $260
- 2% of median
Washington project costs+25% vs U.S. average
Based on District of Columbia labor rates, local material logistics and permit-fee posture for this trade.
What the project looks like start to finish
Typical sequence for this scope. Timing varies with contractor backlog and plan-review queues.
01
Planning & quotes
Scope, material choice, contractor selection
02
Permit application
Filed with City of Washington building department
03
Materials & staging
Order lead time on non-stock materials
04
Installation
2-5 days of work
05
Inspection
Plumbing inspection where a sump discharge is added
06
Closeout
Final sign-off, warranty and documentation
Washington labor intelligence
What the trade charges here, and how much of your price it is.
Loaded hourly rate
$93–$120
Structural crews in District of Columbia · +29% vs U.S. ($82/hr)
Typical crew
3 × 2 days
On-site time for a typical waterproofing job here.
Labor in the price
$5,600
55% of the median — the rest is material, disposal and permit.
Because labor is 55% of this job, Washington wage levels move the price far more than material prices do. A quote well under this labor figure usually means a smaller crew, a longer schedule, or unlicensed help.
Basis: Hometriva labor model: national structural crew rates adjusted by the District of Columbia labor factor (x1.286). · BLS Occupational Employment and Wage Statistics, Hometriva methodology
Why Washington differs from the national average
The local delta, broken into dollars by driver.
Trade labor rates+$1,300
District of Columbia crews price 29% above the national average, and labor is 55% of this job.
Material and delivery+$500
Materials are nationally traded, so they move less — but delivery into this market runs 14% over baseline.
Code and inspection load+$200
Basement Waterproofing carries 20% exposure to local code requirements, and this jurisdiction's review load indexes at x1.12.
Permit fees+$50
Fees are paid to the jurisdiction, not the contractor, and are budgeted separately from the contract price.
Basis: Decomposition of the modeled Washington median against the U.S. median for this scope. · City of Washington building department, Hometriva methodology
Washington vs District of Columbia vs the U.S.
Change the inputs, see your number
The same local model, run against your job instead of the average one.
Simulated basement waterproofing in Washington
$10,460
Likely range $3,960 – $22,760
Simulated from the same local model as the numbers above — it changes the inputs, not the pricing method.
What makes the number move
- Interior drain tile versus exterior excavation and membrane
- Linear feet of wall treated and the number of sump pits
- Concrete breakout and replacement inside the slab
- Battery backup or a second pump for redundancy
- Grading, downspout extension and window well work outside
Who issues each permit
Tracked per discipline — the building permit issuer is not always the body that reviews electrical, plumbing, zoning or fire.
| Discipline | Issuing authority |
|---|---|
| building | City of Washington building departmentModeled estimate |
| electrical | City of Washington building departmentModeled estimate |
| mechanical | City of Washington building departmentModeled estimate |
| plumbing | City of Washington building departmentModeled estimate |
| zoning | City of Washington building departmentModeled estimate |
| fire | City of Washington building departmentModeled estimate |
Permit requirement in Washington
It depends on scope. Like-for-like cosmetic work in Washington is often exempt, but a permit is required as soon as you change structure, plumbing, electrical or the building envelope.
- Permitting authority
- City of Washington building departmentModeled estimate
- Permit fee
- Estimated allowance $0–$520Modeled from comparable fee schedules — not an official quoted fee.
Inspections
- Plumbing inspection where a sump discharge is added
Local conditions that change this job
Only the exposures that materially affect basement waterproofing.
Cooling load / heat exposure
Moderate54/100
Humidity
High66/100
Named-storm exposure
Moderate52/100
The Department of Buildings reviews all work district-wide, and historic-district review covers a large share of the housing stock.
Nearby market comparison
| Market | Local factor | Median | Per linear foot of drain installed |
|---|---|---|---|
| Washington (this page) | x1.249 | $10,200 | $50 – $200 |
| Arlington | x1.066 | $8,700 | $50 – $150 |
| Silver Spring | x1.139 | $9,300 | $50 – $200 |
| Alexandria | x1.066 | $8,700 | $50 – $150 |
What Washington homeowners actually paid
Homeowner-reported invoices for this market. Nothing is published until enough reports clear review, so this section is often empty in newer markets — adding yours takes 20 seconds and no personal details.
Quotes homeowners were given in Washington
Quotes run ahead of final invoices. Reporting yours shows the local spread and where there is room to negotiate.
How Hometriva estimates Washington waterproofing costs
Hometriva does not publish invented city prices. The Washington estimate for basement waterproofing is produced by this chain, and every input is stored separately:
- National baseline$8,200
Typical U.S. cost for basement waterproofing on a single-family home.
- Local labor factorx1.286
Washington-area trade labor rates, weighted at 55% of this job.
- Material factorx1.137
Material and delivery pricing into District of Columbia, weighted at 45%.
- Regulatory factorx1.122
Local code, product-approval and inspection load, applied at 20% for this project type.
- Applied multiplierx1.249
Blended Washington adjustment specific to basement waterproofing.
- Permit component$0 – $520
Budgeted separately from the contract price because it is paid to the jurisdiction.
Because labor, material and regulatory factors are weighted per project, basement waterproofing in Washington carries a different local adjustment than other trades in the same market.
Reviewed by
Hometriva Cost Data Desk
Maintains the unit-cost baselines, local adjustment factors and material pricing. Reviewed for basement waterproofing pricing in Washington, DC.
- • National unit-cost baselines against current trade pricing
- • Local labor and materials factors for the market
- • Material installed-cost ranges and service life
Last reviewed August 2026 · Editorial standards · Report an error
Frequently asked questions
Is a permit needed to waterproof a basement?
Interior drainage is often treated as maintenance, but adding a sump discharge, altering plumbing or excavating against the foundation usually triggers a permit. Ask the local building department before work starts.
Does interior drainage fix the cause?
It manages water that has already reached the wall. When the cause is grading, gutters or a downspout discharging beside the foundation, correcting that outside is cheaper and should come first.
How long does basement waterproofing take?
2-5 days of work. Permit review and inspection scheduling are usually the largest source of variation.
What changes the price the most?
The largest cost drivers are interior drain tile versus exterior excavation and membrane; linear feet of wall treated and the number of sump pits; concrete breakout and replacement inside the slab.
Sources
Sources & verification
- City of Washington building department
- Washington permit portal
- DC Department of Buildings
- BLS Occupational Employment and Wage Statistics
Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.