Planning a Seattle ADU · Confirm the lot and jurisdiction before choosing the plan
Seattle ADU planning guide

Get an ADU Construction Quote in Seattle

Send the jurisdiction, site conditions, ADU path and next decision to request a quote. An independent Seattle-area company decides whether to contact you, assess feasibility or provide pricing.

Seattle ADU Construction is an independent planning and referral resource. It is not a contractor or a permitting office. The form below can be used for a planning response or to request an introduction to an independent company.

Send the project outline

The required fields ask for your name and email, city or ZIP, ADU route, a short description of the existing property and the intended outcome. You may also provide the address, budget stage, anticipated timing and other ordinary project context.

No phone number, text-message permission or document upload is requested. Please leave out financial credentials, identity documents, account numbers, entry codes, health details and confidential tenant material.

What makes an inquiry actionable

If known, include:

  • whether the site is inside Seattle or another city or county.
  • whether you are considering a DADU, attached unit or conversion.
  • the approximate lot and existing-building arrangement.
  • unusual slope, access, tree or utility conditions.
  • plans, survey or prior site review already completed.
  • household or accessibility goals.
  • the exact choice you want to make next.

You do not need a completed design. A concise, honest description is more useful than certainty about facts that have not been checked.

After the form is sent

The response is held by Tally and a notification is delivered privately to the site operator. The operator may assess geography, project type and the requested next step. If a suitable independent business is available, relevant details can be shared so that business can decide whether to respond. Website questions can be sent to [email protected].

There is no promise of a reply, appointment, expert opinion, builder match or quote. A submitted description cannot confirm zoning, engineering, utility capacity, hidden conditions or final price.

Keep control of company selection

Any introduced firm operates independently from this website. Before appointing anyone, confirm the legal business name, current Washington L&I record, insurance, comparable references, scope, assumptions, payment terms and written contract. Get project-specific legal, tax, design or engineering advice when appropriate.

The comparison guide provides a structured review process.

Frequently asked questions

Is the exact street address compulsory?

No. It is optional, although an address is eventually necessary for site-specific review. City or ZIP is required to confirm the likely service area.

Can I attach drawings or photographs?

The initial form has no upload field. If documents become useful, agree on an appropriate method with the party responding.

Does sending the form authorize construction contact by phone?

No phone number or SMS authorization is collected. Initial routing uses the supplied email.

Am I committing to hire someone?

No. You remain free to investigate, compare or decline any independent company.

Share the ordinary site facts, the ADU path you are considering and the one choice you need help moving forward.

Get a Quote
Independent provider notice: Independent planning and referral website. It is not a contractor or government agency. Provider availability varies by address and project. The provider you choose controls assessment, credentials, design, permits, price, contract, construction and follow-up. The website may receive compensation when an introduction produces business.