Custom home starting point
Building a custom home on Seattle's Eastside: from lot to move-in
You do not need to own a lot or choose a city before learning how to build a custom home. Start with the decisions that will shape your budget and options. This roadmap connects the whole process, with detailed guides when you need them.
On this page8 sections
Start with your current stage
| Where you are | The decision to make | A useful output |
|---|---|---|
| No lot yet | Which locations and properties could support your priorities? | A short brief, complete budget ceiling and lot comparison checklist. |
| Considering an address | Can this site plausibly fit the home and the budget? | A feasibility investigation with open questions, owners and deadlines. |
| Designing | Does the coordinated design still fit your total budget? | A site-aware concept, updated estimate and clear consultant responsibilities. |
| Permit submitted | Who needs to act next? | The latest city update, response owner and next follow-up date. |
| Preparing to build | Are approvals, financing, scope and the start date aligned? | A documented start checklist and decision schedule. |
What to check before buying land → · Request a free property feasibility study → · Check your permit →
Write the brief before choosing the lot
List the parts of the home that are essential to your life. Examples include a bedroom without stairs, space for extended family, a quiet office, outdoor play space or a particular commute. Separate those requirements from preferences such as a larger garage or a specific view. A smaller home on a simpler site may serve you better than a larger plan that strains the budget.
Set a ceiling for the entire project, including the lot, site work and the time before you can move in. Decide which compromises you would make first. Then compare candidate lots using the same brief. A mailing address is not enough to establish the permitting jurisdiction. Confirm the actual city boundary and parcel before applying city rules.
For buyers open to Bellevue, Kirkland, Clyde Hill or Medina, compare the restrictions that affect your preferred design. Do not rank cities using just one height or floor-area number. Measurement methods, trees, critical areas and private documents can change the result on an individual lot.
The complete custom home budget → · Compare Eastside setbacks, height and building ratios → · Prepare a useful architect brief →
Test a property before committing to a floor plan
Start with the parcel, public maps, prior permits and available property documents. Then ask qualified professionals to resolve the questions that could change your purchase decision. A mapped setback area is an early planning aid. It is not a confirmed building footprint or permission to remove trees.
Have the house, driveway, parking, outdoor space and construction access considered together. A plausible house outline can still leave no practical drainage solution. A view you like today may also depend on neighboring trees or restrictions that are not visible in an aerial image.
Keep a decision file with four fields: finding, evidence, person who will confirm it and deadline. For a purchase, work with your real estate and legal advisers on the investigation period. Do not treat a public-data study as a substitute for a survey, title review or site-specific professional assessment.
- Geometry: setbacks, height measurement, floor-area rules and separate coverage limits.
- Site: trees, slopes, drainage, possible critical areas and required professional studies.
- Services: legal access, utility availability, installation scope and construction access.
- Private obligations: easements, recorded restrictions and any HOA design approval.
What to check before buying land → · Trees and views across Eastside cities → · Critical areas and other design restrictions → · Easements, HOA rules and recorded restrictions →
Hire a coordinated team and price the concept
Decide how design, pricing and construction will work together. With separate firms, name the person who coordinates architecture, structural design and civil engineering. With a combined design and construction firm, ask the same questions about responsibility, access to documents and what happens if the relationship ends.
Ask for an early estimate tied to an actual scope, not just a square-foot rate. Revisit it when the site plan, structure and major specifications become clearer. A design change to the basement or driveway may also change excavation, drainage and retaining work. Ask for the combined impact before approving it.
WA L&I recommends interviewing contractors, comparing written bids and checking contractor registration. Use its guidance as a starting point, then assess whether the team has relevant experience with your site and project. Have significant contracts reviewed by your own adviser.
WA L&I: Hire Smart, bids and written contracts ↗ · Compare builder bids and change orders → · Which design professionals do you need? → · Site costs beyond the house quote →
Treat permitting as an active project
Agree who assembles and submits the package, who coordinates corrections and who checks for updates. The owner should know the permit number and where the current comments live. A consultant finishing a drawing is different from the applicant submitting an accepted response package.
Bellevue's new-house instructions describe consolidated review and a coordinated construction plan set. Read the current city checklist with your applicant. This does not eliminate site-specific studies or make every separate approval unnecessary. Other jurisdictions have their own submission requirements.
When comments arrive, record the issue, responsible person, promised response and evidence of resubmission. Follow up against that commitment. Build Eastside can help you track supported permits and notice handoffs. It cannot approve plans or guarantee a shorter review.
Bellevue: new house and large addition permit requirements ↗ · What Bellevue consolidated review changes → · Resolve a stalled permit handoff → · Observed Bellevue and Kirkland permit timing →
Align the construction start and the handoff
Before starting physical work, have your team confirm the applicable permits, approval conditions and required inspections. Separately confirm financing, the signed construction scope, site logistics and the builder's actual start availability. A permit issuance date is not automatically a construction start date.
Ask for a decision schedule for items such as windows, cabinets, appliances and finishes. It should show when your choice is needed, what it affects and who confirms the order. During construction, keep scope changes, cost changes and schedule changes together so an apparently small upgrade does not create an unexplained delay.
For handoff, distinguish city authorization to occupy from the builder's punch list and contract closeout. Ask the team to identify the applicable occupancy requirements, outstanding work, warranties, manuals and responsibility for follow-up. Do not assume a planned moving day establishes permission to occupy.
The full homebuilding timeline → · Compare builder bids and change orders →
Put this guide to work
- No lot: write a one-page brief and compare three candidate properties using the same questions.
- Have an address: request the free feasibility study and assign the important unknowns to the appropriate professionals.
- Have a permit: check the latest update and record the next person, task and date.
What to check before buying land → · Request a free property feasibility study → · Check your permit →
Common questions
Should I buy land before talking to an architect or builder?
Seek early professional input before committing to a property when possible. Ask for a focused site and budget review rather than a full house design. The goal is to identify dealbreakers while you still have choices.
Does a larger lot mean I can build a larger house?
Not necessarily. The jurisdiction's dimensional rules, site conditions and private restrictions all matter. A large constrained lot can offer fewer practical options than a smaller, simpler one.
Can I use Build Eastside before I own a lot?
Yes. These guides are open to read without an address or account. When you have a candidate address, you can request a free feasibility study. Permit tracking becomes useful after you have a supported permit number.
Written and sources reviewed . A homeowner planning framework. Verify requirements for the actual jurisdiction, property and scope with your project team.