Written by Amanda Casteel · COO Reviewed by Johnny Casteel · CEO · Master Plumber Updated July 2026 VA Plumbing Lic. 2710075081 · Contractor Lic. 2705180998
Quick answers
- MD state plumbing code: 2024 IPC basis as of Nov 24, 2025.
- WSSC 2024 code: Dec 1, 2025; Amendment #1 Feb 2, 2026.
- WSSC licenses and inspects gas appliances in its territory — plan for that workflow.
- Other MD counties enforce state code with local amendments and their own permit offices.
When to use this guide
Use this before a water heater, gas, or sewer project in Montgomery or Prince George’s County, or when comparing quotes from companies that rarely work WSSC.
Why codes changed
States periodically adopt newer I-codes for safety and consistency. Maryland Building Performance Standards push jurisdictions to adopt within set windows — 2024 IPC is the new floor.
What homeowners feel on the ground
Permit expectations, gas inspection sequencing, and material/installation details can differ from Fairfax or Arlington jobs. We confirm WSSC vs county vs municipal authority for your address.
Customer plus
A plumber who already works WSSC licensing and inspections saves you failed trips and “we don’t work there” surprises. We pull permits, meet inspectors, and hand you paperwork.
See also — broader DMV codes hub
For Virginia’s uniform USBC and DC’s transition, start at our VA vs DC vs MD plumbing codes hub.
Failure modes to avoid
Hiring a NoVA-only plumber for a WSSC gas appliance swap
Licensing and inspection workflows differ. Ask who holds the WSSC credentials before you book.
Assuming county rules match Arlington
Maryland is county-by-county enforcement on top of the state code — address confirmation matters.
Proof & methodology
- · Written by Amanda Casteel (COO), reviewed by Johnny Casteel (CEO · Master Plumber) — Cherry Blossom Plumbing (VA Plumbing Lic. 2710075081).
- · Grounded in Northern Virginia, Maryland, and DC service patterns and the July 2026 DMV code briefing research.
Last updated July 2026
Starting prices (NoVA)
These are Cherry Blossom Plumbing’s actual installed ranges for the DC metro area (July 2026) — not national averages or teaser rates. Low end = straightforward access; high end is real too. Every range includes the permit when one is required. Final flat-rate is confirmed after on-site diagnosis.
Virginia daytime diagnostic $75 — waived with repair. DC & Maryland daytime $150. After-hours: $150 VA / $250 DC-MD. Free while-we’re-in-the-neighborhood estimates; free second opinions with a written competitor quote.
- Gas line repairfrom $350
- Gas line installfrom $750
- PRV / main shutoff valve$650 – $1,400
- Daytime diagnostic (VA)$75 — waived with repair
FAQs
Do you work in WSSC territory?
Yes — we serve mapped Montgomery and Prince George’s corridors and plan for WSSC licensing/inspection when the job requires it.
Is Amendment #1 something homeowners see?
It is a code text change affecting specific sections. We apply the current WSSC book on the job rather than asking you to read amendment PDFs.
Where do permits fit?
See our permits guide and location-page permit notes for your city.
Next step
Ready for help in Arlington or Northern Virginia? We diagnose first, explain options in flat-rate terms, and never upsell what you do not need.