FTS Excavation: ADU Site Development in Western Washington
FTS Excavation provides full-service site development for homeowners planning to build backyard homes, commonly known as Accessory Dwelling Units (ADUs), across the South Puget Sound region of Western Washington. Their work focuses on the ground-up preparation that makes a residential ADU build possible — from initial property assessment through to final site handoff.
An ADU (Accessory Dwelling Unit) is a fully independent second home built on an existing residential property. Homeowners and individual investors pursue ADU projects for a range of reasons, including creating space for family members, generating rental income, and increasing long-term property value. As an experienced ADU contractor in the site development space, FTS Excavation supports these goals by handling the critical underground and civil work that precedes construction.
What FTS Excavation Handles on an ADU Project
Backyard builds come with a level of underground complexity that is easy to underestimate. Projects often require over-excavation, structural fill, septic systems, or deep sewer connections. FTS Excavation manages this complexity through a structured process designed to reduce delays and unexpected costs.
Their site development process covers the following stages:
- Property Review — Assessing plans for accuracy, including slope, soil conditions, drainage, and site access.
- Budget Planning — Establishing a clear budget and preparing homeowners for potential change orders before work begins.
- Timeline Planning — Developing a realistic schedule coordinated with builders and subcontractors to prevent sequencing delays.
- Erosion Control, Clearing & Grading — Installing silt fencing and proper dewatering systems to keep the site code-compliant and avoid civil penalties.
- Foundation Dig & Survey Staking — Excavating per engineered plans, installing drains where required, and backfilling after inspection.
- Utilities & Drainage — Installing septic or sewer connections, water lines, electrical conduit, and storm drainage systems.
- Final Prep & Handoff — Delivering a site that is ready for the builder, with referrals available if needed.
One of the key areas FTS Excavation emphasizes is permit and inspection management. By ensuring plan accuracy upfront and managing all mandatory testing requirements, they work to eliminate the kinds of delays that commonly affect detached ADU and backyard cottage projects.
Poor site work — when rushed or poorly planned — can result in flooding, failed inspections, structural settling, and expensive change orders. FTS Excavation's approach is built around minimizing these risks through realistic timelines and thorough project management of site preparation.
Certifications and Qualifications
FTS Excavation holds a number of relevant certifications that support their work on residential ADU and site development projects, including:
- Septic Installer License
- Right of Way Bonding
- CESCL (Certified Erosion and Sediment Control Lead)
- Fireline Installer certification
These credentials reflect the range of technical work involved in preparing a site for an accessory dwelling unit build, particularly in a region like Western Washington where soil conditions, drainage requirements, and local permitting standards add layers of complexity to any granny flat or in-law suite project.
For homeowners in the South Puget Sound area planning a backyard ADU, FTS Excavation offers site development services focused on reliability, accurate planning, and professional execution from start to finish.
