ADU Builder in Western WA
Full-service site development for homeowners building backyard homes (ADUs) in the South Puget Sound region.
Get a Estimate for your ADU
- Licensed and Insured
- Veteran and Women Owned
- Serving Puget Sound, WA
Why Choose FTS Excavation:
- Generational housing
- Minimal change orders
- Realistic timelines and project management of site preparation
- Many certifications including Septic Installer License, Right of Way Bonding, CESCL, Fireline Installer, etc.
- Site Utility Provisioning & Coordination
Why Site Development Matters
Underground Complexity
Backyard builds often require over-excavation, structural fill, septic systems, or deep sewer connections.
Permits & Inspections
We eliminate delays by ensuring plan accuracy and managing all mandatory testing.
Site Clearing & Erosion Control
Expert installation of silt fencing and grading systems to handle dewatering and keep your site code-compliant
Costly Mistakes When Rushed
Poor site work can lead to flooding, failed inspections, structural settling, change orders, and expensive delays.
What is an ADU?
An ADU (Accessory Dwelling Unit) is a fully independent second home built on your property.
Homeowners and individual investors build ADUs to:
- Generational housing
- Create space for family
- Increase long-term property value
- Generate rental income
Our Site Development Process
1. Property Review
Assess plans for accuracy slope, soil, drainage, and access.
2. Budget
Create a clear budget and prepare customers for potential change orders.
3. Timeline Planning
Develop a realistic schedule coordinated with builders and subs. Sequenced to prevent delays.
4. Erosion Control, Clearing & Grading
5. Foundation dig & survey
staking
Excavate per engineered plans, install drains if required, and backfill after inspection.
6. Utilities & Drainage
Install septic or sewer, water line, electrical, and storm drainage.
7. Final Prep & Handoff
Site ready for your builder with referrals available if needed.
Why Home-Owners Trust Us
