Professional Plumbing Services in Seattle and the Puget Sound

Your Local Plumbing Experts

When you have plumbing needs, you need a team who can take care of them. At Biddle Contracting Services, we offer full-scope plumbing services in Seattle, Tacoma, and surround cities for both homes and businesses. Whether you need a brand-new installation or are planning an upgrade, we’re here to help.

Comprehensive Plumbing Services

Serving Commercial & Multi-Family Projects for Over 50 Years

Our licensed plumbing teams specialize in large-scale plumbing installations, including new construction and full water piping replacements in existing buildings. From underground utilities to final trim, we manage each phase with precision, coordination, and a deep understanding of commercial and multi-family requirements.

Underground & Groundwork Plumbing

Every successful build starts below the surface. We install underground plumbing systems that form the foundation of reliable water and waste flow for the entire structure.

  • Underground water and sewer piping

  • Utility connections and tie-ins

  • Trenching and groundwork coordination

  • Code-compliant installations ready for inspection

Rough-In Plumbing for New Construction

We provide complete rough-in plumbing services for multi-family and commercial projects, ensuring systems are properly laid out before walls are closed and finishes begin.

  • Water supply and distribution systems
  • Waste and vent piping
  • Coordination with framing and mechanical trades
  • Multi-unit and mixed-use building layouts
Finish Plumbing & Final Installation

Once construction progresses, we complete the final phase of plumbing installation to prepare the building for occupancy.

  • Fixture installation and final connections

  • System testing and pressure checks

  • Inspection readiness and punch-list completion

  • Turnover support for owners and builders

Plumbing Retrofits & Full Water Piping Replacement

For existing buildings undergoing major renovation or experiencing aging infrastructure, we perform complete plumbing system retrofits.

  • Removal of outdated piping systems

  • Full building water piping replacement

  • System redesign to meet current code

  • Ideal for occupied or phased renovation projects

Commercial Plumbing Installations

We work across a wide range of commercial property types, delivering plumbing systems designed for durability, capacity, and compliance.

  • Restaurants and food service facilities

  • Hair salons and personal care spaces

  • Schools and educational buildings

  • Medical and dental offices

  • Coffee shops and retail spaces

  • Strip malls and multi-tenant commercial properties

The Biddle Difference

Honest Work. Proven Results.

We’re not just another plumbing company in town; we’re part of the Seattle and Tacoma community. For 50 years, locals have trusted us to deliver quality work without the runaround. We keep job sites clean, pricing clear, and communication simple. Our promise: dependable plumbing, fair rates, and service that earns your trust every time.

Have Questions? We Have Answers

Frequently Asked Questions About Our Plumbing Services

We provide residential and commercial plumbing throughout Seattle, Tacoma, and neighboring cities across the Puget Sound region.

Our team works with a wide range of commercial properties, including restaurants, coffee shops, hair salons, schools, medical and dental offices, strip malls, and multi-tenant commercial buildings. Each system is designed to meet the specific demands of the space and its usage requirements. We also provide multi family plumbing projects for new and existing buildings.

Yes – when scheduling permits. Our work is primarily focused on new construction plumbing and full-system retrofits for buildings that require reliable infrastructure.

A retrofit project typically involves removing and replacing all or part of systems within existing buildings.

Yes. Biddle Contracting Services frequently partners with general contractors, developers, and property owners. The team is experienced in coordinating schedules, inspections, and project milestones on complex commercial and multi-family builds.

You can call us directly or request service online using our contact form. A member of our team will confirm your appointment and provide a clear estimate before any work begins.

Yes. Biddle Contracting Services is fully licensed and insured in the state of Washington. Every technician on our team is trained and certified to ensure your plumbing work meets safety and building code requirements.

You can request a free estimate by filling out our quick, two-minute online form or by giving us a call. Be prepared to share project details such as building type, scope of work, and construction timeline so the team can provide accurate guidance.

Yes. The team is experienced with phased construction schedules and multi-stage builds, particularly in multi-family and commercial environments. Coordination with general contractors and other trades ensures plumbing work aligns with overall project timelines.

Ready for Reliable Plumbing?

Get Started Today

Ask About Our Plumbing Services in Seattle and Surrounding Cities

Let’s Get Your Plumbing Project Moving

Planning a new build or preparing for a full plumbing system replacement? Biddle Contracting Services partners with builders, developers, and property owners to deliver reliable plumbing installations from the ground up. Contact our team today to discuss your project.