DC kept the sprinkler rule most states dropped. We make it a line item, not a surprise.
A new house or townhouse in the District comes with a residential sprinkler system, and so do most of the projects reshaping DC housing: two-story ADUs, pop-ups turning rowhouses into two-flats, English basements becoming rental units. We design 13D systems, file them with the DOB permit set, install, inspect, and repair. Published pricing, written quotes, crews licensed for the District.
Three problems, one trade
ADUs, pop-ups, and English basements
A two-story ADU typically makes your property a two-family dwelling, and that calls for a full 13D system. Same story when a rowhouse becomes a two-flat. The cheap time to learn this is before the drawings go to DOB.
Read the straight versionNew construction 13D systems
Every new house and townhouse built in the District gets a sprinkler system as part of the permit, teardown-rebuilds included. We design, file with DOB, install before drywall, and run the acceptance test.
Read the straight versionWater service upsizing
Plenty of DC rowhouses still drink through a service line sized for 1920s plumbing. When the sprinkler demand outruns it, the fix is an upsizing coordinated with DC Water, and we settle that question before quoting.
Read the straight versionRough out your system in ten seconds
Three questions, priced straight off our published table. The real quote is written after we read your plans, and it is free.
New construction sits at the bottom of our pricing because the pipe goes in before the drywall. If an older service line cannot feed the system, the upsizing is a separate line we price after checking the records with DC Water.
Your two-story ADU just became a two-family dwelling. Here is what that means.
DC’s alley lots and deep rowhouse parcels are sprouting accessory dwellings, and the code detail that surprises owners is the second story: a two-story accessory building typically reclassifies the property as a two-family dwelling, which calls for a full 13D sprinkler system rather than something lighter. That is a design question, not a construction one, and it belongs in the drawings before they go to DOB. We have watched more than one ADU budget meet this rule for the first time at plan review. Reading your plans before they are final costs nothing.
Area guides
Each guide is specific: where the carriage houses are, where the new townhouse rows are going up, and how the projects in that part of the District actually meet the sprinkler rule. No two read alike because no two areas build alike.
Northwest DC
Sprinklers for Georgetown carriage houses, Petworth garage conversions, and the English basements of Columbia Heights. 13D design, DOB filings, published pricing.
Georgetown · Petworth · Columbia Heights · Palisades
Capitol Hill and Northeast
Sprinklers for Capitol Hill alley builds, Brookland garage conversions, and rowhouse two-flat conversions across Northeast DC. 13D and 13R quoted honestly.
Capitol Hill · Brookland · Eckington · Trinidad
East of the River
New townhouse rows east of the river carry NFPA 13D systems as part of the permit. Design, installation, DOB filings, and inspections at published pricing.
Anacostia · Congress Heights · Deanwood · Fort Dupont
The numbers, before you call
Roughly $1.35 to $1.60 per sprinklered square foot in new construction, and $2 to $7 for retrofit work depending on access and finishes, with occupied rowhouse retrofits toward the top of that band. The cost page carries the whole table so you can check any bid against it, ours included.
See the cost guideWhat we will not do
- Tell you your garage conversion definitely needs sprinklers before plan review has read it. Scope decides.
- Quote a rowhouse retrofit without seeing the house and the service line.
- Stretch into mid-rise 13R work that belongs with the commercial companies.
- Leave the permit filing to you. DOB filings ride in the quote.
Send the address, we read the plans
The sprinkler answer is cheapest before the drawings are final, and a leaking head is cheapest today. Either way it starts with the address.