Custom rough-ins and eco-friendly fixture installations for high-end builders.
Partner with D.C.'s premier plumbing contractor for custom builds and massive renovations. We handle everything from the initial underground rough-in to the final trim with eco-friendly, luxury fixtures. We work smoothly with architects and general contractors to ensure projects stay on schedule.
Building a custom home, adding an accessory dwelling unit, or gut-renovating a historic property in the Washington D.C. area requires more than just connecting pipes. The specific challenge for local builders and homeowners is integrating modern plumbing systems with aging municipal infrastructure, tight city lot lines, and strict regional building codes. Under the guidance of our owner, Sharma, the team at i4improvements brings a straightforward, no-nonsense approach to new construction plumbing. We are fully licensed and insured in both D.C. and Virginia, meaning we design and install systems that meet the exact demands of your project without cutting corners.
Local regulations dictate how we approach every trench, pipe, and fixture. If you are preparing for the Virginia SB 531 ADU zoning changes taking effect in July 2027, we can run the necessary underground water and sewer lines to your new backyard unit. In the District, gut-rehabs often require navigating the Historic Preservation Review Board (HPRB), and any new rental unit must pass strict inspections to secure a Basic Business License (BBL). We also coordinate closely with the Lead Free DC program, ensuring the private side of your water service line is safely replaced while DC Water handles the public side. When it is time to install equipment, we are a Bradford White & Rinnai Authorized Installer, and we can help you navigate both IRA federal heat-pump rebates and local DCSEU rebates for high-efficiency water heaters. Please contact us for current eligibility on all rebate programs.
A typical new construction plumbing project happens in distinct phases, usually starting with underground groundwork before moving to the rough-in of drains, vents, and water supply lines. For a standard single-family home or major addition, the rough-in phase typically takes one to three weeks, heavily dependent on municipal inspection schedules and the complexity of the floor plan. Because pricing varies significantly based on fixture counts, square footage, and whether we are trenching a Fairfax County concrete slab or working in a cramped D.C. rowhouse basement, we provide detailed, defensible estimates after reviewing your architectural plans. We focus on transparent pricing so you know exactly what the plumbing scope will cost before we break ground.
The right time to lock in a plumbing contractor for your new build is before the foundation pour — not after. i4improvements is fully licensed and insured in both D.C. and Virginia, with a track record (4.9 stars, 55 reviews) that architects and general contractors rely on to keep their timelines intact. 24/7 dispatch covers our active job sites. Call (703) 342-8068 to walk through your blueprints and schedule a site visit.
Adding an ADU or backyard unit? See zoning rules and timelines in our ADU Construction Guide.
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Washington D.C., Arlington, Fairfax, & Maryland