Call Now
Website
Call
Business Details
36 Years
experience
Expert Septic System Design Services Monroe, WA
Established in 1990, Amman Septic Designs Inc. has delivered expert septic system design and feasibility studies for over three decades. Our founder, Jeff Amman, holds a state-wide license and specializes in complex site assessments, focusing exclusively on Snohomish and King Counties to ensure localized expertise. We prioritize transparency with upfront pricing and detailed fee breakdowns, refusing to profit from third-party permits or hidden charges. Our process includes comprehensive soil evaluations, compliance with public health regulations, and collaboration with trusted installers.

Clients benefit from our commitment to quality, with designs revised at no extra cost until approved. We accept major credit cards without surcharge and provide clear guidance for navigating permit requirements. Our team handles all stages from initial feasibility studies to final as-built submissions, ensuring seamless project execution. With decades of experience in challenging terrain, we offer tailored solutions for residential properties. Our dedication to ethical practices and client education has solidified our reputation as a reliable partner in septic system design.
Services
Septic System Design Feasibility Studies Repair Designs As-Built Inspections Permit Assistance
Details
  • Year established: 1990
Highlights and features
  • We offer 35+ years of specialized septic system design expertise.
  • Our team focuses exclusively on Snohomish and King Counties for localized knowledge.
  • We provide transparent, upfront pricing with no hidden fees.
  • All designs include unlimited revisions until Public Health approval.
  • We maintain partnerships with trusted, licensed septic installers.
Services
Septic System Design
We create customized septic system designs compliant with Washington State Department of Health regulations. Our process includes soil analysis, system type determination, and permit submission. Clients receive detailed plans for conventional gravity flow, low-pressure distribution, or alternative systems like sand filters and aerobic units. Designs undergo revisions at no additional cost until Public Health approval.
Feasibility Study
Our initial site evaluation determines soil suitability for septic systems through perk testing. This assessment identifies required system types and potential challenges. The study costs $850 and is mandatory before design work begins. We use our excavator when possible to minimize disruption during testing.
Repair Designs
We specialize in designing replacement systems for failing septic tanks. Services include site re-evaluation, water usage analysis, and preparation of new designs. Clients receive guidance through county-mandated replacement processes, with emphasis on compliance with Snohomish and King County regulations.
As-Built Inspections
Post-installation inspections ensure systems match approved designs. Includes preconstruction conferences, pressure testing, and preparation of final as-built documentation. This $75 service covers all inspections required for Public Health final approval.
Permit Assistance
We handle permit submissions and coordinate with Snohomish Health District and Public Health Seattle/King County. Services include preparation of declaration of covenants, water availability documentation, and operation/maintenance agreements required for approval.
People
Jeff Amman
President
Licensed septic system designer since 1990 with over 35 years of experience in Snohomish and King Counties. Specializes in complex site assessments and regulatory compliance.
Questions
Do you install septic systems?
No, we specialize in design and permitting only. We provide a list of trusted installers.
What areas do you service?
We work exclusively in Snohomish and King Counties, Washington.
Are your prices negotiable?
Our fees are fixed and include all revisions required for approval.
What payment methods do you accept?
We accept cash, checks, and major credit cards with no transaction fees.
Can I use my own installer?
Yes, any Snohomish or King County licensed installer may use our designs.
What happens if my design gets denied?
Our fee includes unlimited revisions until initial approval from Public Health.