Seattle  ·  Bellevue  ·  Eastside 2026
The Architect's Guide to Custom Homes

Everything you need
to know before
you begin.

Many people spend months searching for an architect before understanding how the process actually works — or what it really costs. This guide exists to change that. Read it before our first conversation and we'll be able to skip straight to what matters: your project. — Andrés Villaveces, Design Director
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P1

Start here.

If you're reading this, you're probably considering building a custom home. Maybe you already have a property, or a rough idea, or just a serious question about whether it's even possible for you. It's a big decision, and it can feel overwhelming, but it doesn't have to be.

There's a process that architects and builders have followed for a long time, with clear phases, real timelines, and costs that can be understood before you commit to anything.

We made this guide for that reason. It walks through who's involved, what gets done, what it costs, and how long it takes. It's the conversation we'd want to have with you anyway, just written in this guide so you can read it on your own terms.

Take your time with it, and if something isn't clear, please reach out.

Andrés Villaveces
Design Director
A note on this guide

The costs, timelines, and fee ranges here come from our practice: modern homes in the Seattle–Bellevue area and greater Eastside, current as of 2026. Construction costs vary by site, builder, and market. Design fees vary by scope and architect. If you're building elsewhere or at a different scale, the process and roles still apply — bring the numbers to your own team as reference points.

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P2 Contents

What's inside.

P3
At a Glance
The Team
There are three parties in every project. The Owner (that's you), the Architect (that's us), and the Builder. Each has a distinct role.
Construction Cost
A healthy budget is around $625/SF in net construction costs, or $800/SF once you include the contractor's fee and sales tax. Learn more here.
Architect's Fees
In line with industry, at around 10% of construction cost. One contract covers the full scope: architecture, engineering, and all technical work.
Timeline
Expect about one year for design and 18 to 24 months for construction.
Availability
We take a small number of custom homes each year and are typically booked a few months ahead. If you're considering a project, get in touch early.
P4 Part I

The Process.

"Every custom home project involves the same core triangle: the Owner, that's you, the Architect, and the Builder. Each has a distinct role, and understanding where one ends and another begins will help you ask the right questions, and avoid the most common misunderstandings."

Juan P. León, Principal
P5

§ 01The People Involved.

A custom home requires three parties: you, your architect, and your builder. Each holds a separate contract and has a distinct role.

01 The Owner: You

Three things come from you: the Site, the Budget, and the Brief. The Site makes the project real. The Budget makes it realistic. The Brief is the goal: the size of the home, its spaces, and the character that makes it yours.

Things to know
  • The timing of your decisions matters as much as the decisions themselves. Delayed decisions delay the project. Changed decisions change the budget.
  • Be honest about your budget, from the beginning. Some owners hold their real number back, thinking it gets them a better deal. It doesn't. The design ends up shaped around what you want rather than what you can afford, and you fall in love with a project that's out of reach. A realistic budget gives us the target to design around. No project was ever successful chasing a moving target.
  • You will hold two separate contracts: one with the architect, one with the builder. Neither works for the other. Both work for you.
02 The Architect: Us

The architect is the only professional who carries the design, the technical work, the strategic decisions, and the coordination of everyone involved, all under a single contract.

Things to know
  • We bring a point of view. You're hiring us because you like our work.
  • We coordinate the entire design team. Civil, structural, mechanical, electrical, plumbing, landscape, and any other consultant the project requires. All under our contract.
  • When construction starts, the architect doesn't disappear. We stay involved as your representative on the project, protecting what was designed and looking out for your interests.
  • No two projects are the same. Every site, every budget, every set of codes presents different constraints. We bring the experience, the judgment, and the design ability to work through all of them.
  • We design, not build. Our job is to turn your idea into a project that can actually be built.
03 The Builder

The builder turns the project into a home, figuring out how it goes together, who does what, and solving the problems nobody else thinks about.

Things to know
  • A good builder is worth every dollar. Building a custom home is among the most demanding things a general contractor can do.
  • The earlier the builder is involved, the better the project. During design, they validate the budget in real time. By the time construction starts, they know the project as well as we do, their subcontractors are lined up, and the numbers are real.
  • The right builder makes the project. We help you select and review their bids. Your contract is with them, and you pay them directly.
  • A good GC and a good architect working together makes an enormous difference. During construction, we stay in constant communication, answering questions and helping resolve problems as they come up.

"The single most important thing you bring, beyond the land and the budget, is an open mind and a spirit of curiosity. Design is a process of discovery. The more openly you engage with it, the better the outcome."

Andrés Villaveces, Design Director
P6

§ 02The Process.

About one year for design and permits, then one to two for construction.

1
Understand
1 month
2
Design
2 months
3
Engineer
3 months
4
Detail
4 months
5
Build
12–24 mo
01 Understand 1 month

The project parameters are defined. Designing a custom home starts with understanding three things: what the site will allow, what the code will allow, and what the budget will support. Each has limits and opportunities, and they're not always obvious. We study them carefully before drawing begins, so the design that follows is buildable, on budget, and shaped by what the site does best.

What Gets Done
  • Signed Contract
  • Budget
  • Project Goals
  • Site Visit and Photographs
  • Land Survey
  • Geotechnical Report
  • Arborist Report
  • Site and Zoning Analysis
02 Design 2 months

The character, scope, scale, and size of the project are defined at this stage. This is the most collaborative phase. We meet often, explore options, and refine to make the big decisions: what the house looks like, how it sits on the property, how it feels to move through it. Functionality, appearance, and performance are all considered. The schematic design is then shared with two parties: with a builder, for an initial opinion on costs, and with the city, in a pre-application meeting, to surface regulatory concerns before the permit application is filed.

What Gets Done
  • Schematic Design Drawings
  • 3D Model
  • Target Budget (ROM)
  • Contractor Feedback
  • Pre-Application Meeting with City
03 Engineer 3 months

All technical work is integrated into the drawings, and the Building Permit Application is submitted to the city. We bring in the engineering team for structural, mechanical, electrical, plumbing, and civil, and coordinate their designs and technical requirements into the drawings. Once engineering is fully integrated, the drawings and supporting documents are assembled into a Building Permit Application, which is submitted to the city to start their review process.

What Gets Done
  • Architecture Permit Set
  • Structural Engineering
  • MEP Engineering
  • Civil Engineering
  • Architectural Backgrounds for Engineering
  • Building Permit Application
  • Permit Review Coordination
04 Detail 4 months

The complete design is documented. The technical drawings and specifications your builder will use to price and build the project are completed at this stage. Following the Building Permit application, the interior design process begins: room by room, each space is fully developed, with material palettes, finishes, fixtures, and built-in elements all selected and integrated into the documents. Kitchens and bathrooms come first; stairs, custom elements, and finishes follow. The result is a coherent design throughout, not a collection of independent choices.

What Gets Done
  • Interior Architecture
  • Material and Fixture Selections
  • FF&E Schedule
  • Construction Documents
  • Standards and Specifications
  • Updated Budget
05 Build 12–24 months

The design materializes and your home gets built. This is the longest phase, typically 12 to 24 months. We visit the site regularly, review submittals and shop drawings, answer questions as they come up, and produce supplementary drawings when needed. Issues will arise (site conditions, material availability, decisions you'll need to make), and the team will work through them. What was decided during design has set the course; the work now is to deliver it.

What Gets Done
  • Contractor Selection
  • Bid Review
  • Budget Alignment
  • Contract for Construction
  • Site Visits and Observation
  • Construction Administration
  • Certificate of Occupancy
P7

§ 03The Workplan.

A month-by-month view of a typical custom-home project. Ten months of design and permits, two months of buffer for city review and contract, then twelve to twenty-four months of construction.

Month 1Understand
Project brief signed off.
  • Kickoff meeting and project portal set up
  • Site documented (visit, photos)
  • Boundary and topographic survey ordered
  • Geotechnical and arborist reports ordered
  • Zoning and code analysis
  • Scope, budget, and goals confirmed in writing
Month 2Design
Concept direction established.
  • Concept design options, plans, and massing
  • Concept presentation and client review meeting
  • Preferred alternative selected
Month 3Design
Design direction defined.
  • Refined floor plans, elevations, sections
  • 3D model and renderings
  • Target cost plan
  • Schematic Design complete
Month 4Engineer
Consultants engaged. Concept engineering complete.
  • Structural, Civil and MEP engineers under contract
  • Architectural Backgrounds for Engineering issued
  • Outline specifications drafted
  • Concept engineering complete
Month 5Engineer
Coordinated permit set assembled.
  • Engineering drawings received from consultants
  • Architectural set updated to reflect engineering
  • Permit submittal checklist complete
Month 6Engineer
Permit application submitted.
  • Permit package assembled
  • Application submitted to the city
  • Plan-review tracking begins
Month 7Detail
Interior direction approved.
  • Material palette and interior theme presentation
  • Preliminary FF&E direction
  • Client review and approval of direction
Month 8Detail
Every room laid out.
  • Kitchen, bathroom, and bedroom layouts
  • Social, service, and other spaces
  • Preliminary room data sheets
Month 9Detail
All materials and fixtures selected.
  • Key material samples reviewed
  • Final room data sheets
  • FF&E Schedule complete
  • Interior Design report issued
Month 10Detail
Construction documents issued.
  • Construction drawings, details, and schedules
  • Specifications and project manual
  • Updated cost plan
  • CDs complete — ready for bid and construction
P8

§ 04What Our Clients Say.

Custom Home in Kirkland

"Partnering with Métrica on our custom home in Kirkland has been a great experience. They are a talented, knowledgeable, and creative team. We really appreciated how they listened to our feedback and were very understanding during the entire process. Andrés and Juan, just awesome all around."

Vani S, OwnerCustom Home, Kirkland WA
Custom Home in Clyde Hill

"Andrés' design is one of a kind, you cannot find anything like it in the greater Seattle area. And it's always practical. He made really good use of the land, and the floor plan is super reasonable. Juan and the team continuously provided weekly reports with milestones. Everyone at Métrica is genuinely responsive. I don't think we can find a better team."

Sara L, OwnerCustom Home, Clyde Hill, WA
Custom Home in Shoreline

"Thank you for the photos. It really does make me realize how much of our house stands out. Every day, we are extremely grateful for such a beautiful home and view. Thank you and the entire team for designing it so well!"

Jen P, OwnerCustom Home, Shoreline, WA
Custom Home in Bellevue

"Andrés was a true visionary, and his expertise and creativity were evident in every aspect of his work. He helped us design an amazing home that was beyond our initial expectations. His layout design was different from our initial thought, but we found ourselves liking it more and more every time we looked at it. Juan was very professional and paid extra attention to details, ensuring every aspect of the project was handled with care and precision."

Wei F, OwnerCustom Home, Bellevue WA
P9 Part II

What It Costs.

"As your architect, we design. That part is expected. But design is only half of what we do. The other half is orchestration. Building a custom home isn't a single project, it's a collection of interdependent ones. We've done this long enough to know who to call, in what order, and how to keep everyone working toward the same goal."

Andrés Villaveces, Design Director
P10

§ 05Construction Costs.

Construction cost is a function of size and design ambition. In the Seattle–Bellevue area, costs range from around $350/SF for production homes to $2,000/SF or more for highly custom builds. Métrica designs in the $650 – $1,200/SF range, and we recommend at least $800/SF for real quality and design ambition.

Note: $800/SF includes GC fees and sales tax. It is equivalent to about $625/SF for net construction alone. Some people may quote without fees or taxes, and the number will appear lower. You can read more about it here.

Estimate the Construction Cost.

Pick a home size and a level of design ambition to get a planning-level budget for construction. If you are not sure how to size the home, see our size planner here.

Construction Cost
Size
SF
2,000 SF 6,000 SF 10,000 SF
Design Ambition
$ / SF
$600 / SFRestrained $800 / SFRecommended $1,200 / SFAmbitious
A · Net Construction Costs$0
B · GC Fee · 16% of 'A'. See notes.$0
C · Sales Tax · 10.1% of 'A'+'B'$0
Estimated Construction Cost$0
Notes
  • The GC fee varies, usually between 12–20% of net construction cost. The calculator uses 16% as a market average.
  • Sales tax in the area can vary by jurisdiction.
  • Total is a planning-level estimate. Costs vary with site conditions, design ambition, and market conditions. Use this as a starting point for the conversation with your architect or builder, not as a bid.
P11

§ 06Architect's Fees.

Our fees are in line with industry standards, at around 10% of construction cost. One contract covers the full scope: architecture, engineering, and all technical work.

Our fee is fixed and based on project square footage. You know the number before we start, and it does not change if your construction budget shifts. The rate per square foot decreases as project size increases.

Architect's Fee
Includes engineering and consultants
Project Size
SF
2,000 SF6,000 SF10,000 SF15,000 SF
Est. Construction Cost (at $700/SF)
Area
Rate
Architect's Fee
=
%
Architect's Fee — Rate / SF
What This Fee Covers

The fee covers architecture, all engineering, and the consultants your project requires. We hold the contracts and coordinate the work; you do not manage any of it.

  • Structural engineer
  • MEP engineer
  • Civil engineer
  • Geotechnical engineer
  • Arborist
  • Land surveyor
  • Landscape architect
  • Interior design (in-house)

Some projects need additional consultants by choice or necessity (critical areas consultant, project biologist, or others). These are not included in the base fee.

Permitting Fees

Permitting fees (plan review, building permit, and inspections) are paid by the owner directly to the jurisdiction. They typically run 2 to 3% of construction cost, but vary by project scope and jurisdiction. We can help you estimate these early in the process, but the final number comes from the permitting authority.

P12

§ 07Total Investment.

A custom home's total cost has two parts: construction costs (what you pay the builder) and project costs (what you pay everyone else). The proportions stay roughly consistent across project sizes.

Together they break down as follows.

Construction costs
ANet Construction Costs71%
BContractor Fee12–20% of A11%
CSales Tax~10.1% of A+B8%
Construction Cost Total91%
Project costs
DDesign & Engineering~10% of A7%
EPermits & Fees~3% of A2%
Subtotal9%
Total100%
What's not included

The total above covers design and construction. Other costs sit outside it depending on the project, including land acquisition, landscaping, furnishings, owner's insurance during construction, and financing.

P13 Part III

Working Together.

"Before a single shovel hits the ground, there are more specialists involved than most clients expect. Each one needs to be briefed, coordinated, and aligned. We've spent years building relationships with the right engineers, the right surveyors, the right consultants, and we know who's best for what kind of site and what kind of problem. That network, tested across dozens of projects, is part of what you're hiring. Most clients don't see that work. They shouldn't have to. That's what we're here for."

Juan P. León, Principal
P14

§ 08How We Work Together.

The business side of a project shouldn't be a source of stress. We structure our agreements to be simple, predictable, and fair, so your energy goes into the design, not the paperwork.

Our Fee Is Already in the Budget

The Design & Engineering line in the calculator is ours. It covers architecture, engineering, and the consultants your project requires. One number, one contract, one point of contact.

We Bill the Same Amount Every Month

One deposit to start, then one invoice per month for the same amount. The deposit is 10% of the contract. It reserves your place in our schedule and funds the early project expenses, including our own staff time and the first consultants we engage: land survey, geotechnical report, arborist study, and others. After that, you receive the same invoice every month for the duration of the contract.

Our Contract Runs One Year

The design phases typically take 10 months. We contract for 12. That buffer covers permit review delays, which are common and outside anyone's control. If something needs to change, we have a conversation and adjust together. No unilateral surprises on either side.

Time Is Money, for Both of Us

The longer design and permitting take, the more expensive the project becomes, regardless of what the construction budget says. This is one of the most common concerns new clients raise: how do we stay on schedule? The answer is that our interests are aligned. For you, schedule is money. For us, it is cashflow. Our fee is fixed, so a longer timeline does not mean more revenue, it means less efficiency. We move quickly because both sides benefit when we do.

Out-of-Scope Services

Some sites require additional studies: critical areas reports, geotechnical follow-up, specialized consultants. Some neighborhoods add HOA review on top of the city process. And sometimes the scope simply changes. You decide to add a floor, expand the program, or change direction mid-design. It happens. We flag these situations early and either agree on a fixed number upfront or bill hourly. Nothing proceeds without your approval.

How We Communicate

We keep you updated weekly. Most meetings are virtual, which is more efficient and lets us share the design on screen and walk through models together in real time. We meet in person at key moments, during regular business hours, on a recurring schedule that works for both sides.

A Typical Engagement
Deposit to start10% of contract
Monthly invoices12
Total payments1 deposit + 12 monthly
Contract duration12 months
Design timeline10–12 months
Out-of-scope servicesHourly, or agreed fee
Communication cadenceWeekly updates
Construction administrationHourly, see note

"The goal is that you always know where you stand: what has been done, what is coming, and what it costs. That predictability is part of the service."

Andrés Villaveces
A note on construction administration

One site visit per month and a weekly allowance of staff time to review and respond to the contractor's questions is included in our fee. Beyond that, construction administration is billed hourly. How much is needed is unpredictable; it depends on the project, the builder, and what comes up on site. Most of the day-to-day work is covered by the allowance. Larger items (a design change, a scope adjustment, a detail that needs to be reworked) may require additional hours. We flag those as they come up, and nothing proceeds without your approval.

P15

§ 09Who We Work With.

A guide that's honest about who we work well with saves everyone time.

Who We Work Well With

Our best clients are demanding about excellence. They recognize it when they see it and are willing to invest in getting it right. They value elegant problem-solving and the clarity that comes from a disciplined process. They give the work room to develop. They understand that design is a process of discovery, that strong ideas need space to evolve, and that architecture takes time. A thoughtful budget helps too: sufficient to do something meaningful, but disciplined enough to encourage elegant solutions rather than excess.

You Bring the Decisions

You are a key part of this process. Design moves forward through decisions, and decisions require your input. We will guide you, present options, and give you our recommendation. But the project moves at the speed of your decisions. A delayed decision ripples through everything that follows.

How Much Time Will This Take?

Less than you might think, but more than zero. During the Design phase, expect regular meetings and active back-and-forth. During Engineering, we are mostly heads-down and will reach out when we need input. During Detail and interiors, you are involved again. Material selections and room-by-room decisions need your eye. Expect showroom visits to see materials, finishes, and fixtures in person before committing. During Construction, you can be as involved or as detached as you want, but most clients end up visiting site about once a week. It is your home going up, and seeing it in person changes things. A good builder makes this phase smooth. Budget roughly a few hours per week during active design phases.

What we ask of you
  • Timely responses to questions and design reviews
  • Monthly payments on schedule
  • Clear communication when goals or priorities shift
  • Trust in the process, and willingness to let good ideas develop
  • A few focused hours per week during active design phases
Capacity

We take on a small number of custom homes each year. That's not a constraint, it's a choice. It means every project gets our full attention, and every client works directly with us. If you are thinking about a project, reach out early. We are typically booked a few months ahead.

Save your spot Join the Waitlist →
Ready to start? Start a Conversation →
P16

§ 10Who Builds Your Home.

The right builder changes everything.

When Do We Bring Them In?

Earlier than most people expect. We like to have a contractor involved by the end of the Design phase, before engineering begins. At that point we have enough drawn to get a meaningful cost opinion, but the design is still flexible enough to respond to what we hear. Waiting until the permit set is complete means any budget surprises come too late to address without expensive rework. Early involvement costs nothing and gives everyone better information.

What to Look For

Experience with custom homes at your quality level. A track record of finishing on budget and on schedule. Transparency about how they manage subcontractors and handle surprises. References you can actually call.

Chemistry Is the Most Important Thing

You will spend 12 to 24 months in a close working relationship with this person. You will make hundreds of decisions together. There will be surprises (there always are), and how your contractor handles those moments matters more than their portfolio. Trust your instincts. If communication feels off in the interview, it will feel worse on site. The right contractor should make you feel confident, not managed.

How We Help

We don't select your contractor; that's your decision and your relationship. But we can recommend builders we've worked with, contractors we know and want to work with, or builders who've been referred to us by people we trust. If there's someone better suited to your specific project, we will say so. Our recommendation will always be whoever is right for the job, not just whoever we've worked with before. Our duty is to you. We will help you structure and evaluate the bid, and make sure whoever you choose fully understands the design intent before they sign. During construction, we stay involved: regular site visits, review of submittals and material samples, and a direct line when questions come up in the field.

A few things worth knowing
  • Minor changes during construction are usually fine. Major ones (adding a floor, moving structure) affect cost and schedule significantly. Talk to us first.
  • When your contractor suggests a change in the field, we evaluate it. Sometimes it's a genuine improvement. Sometimes it compromises something important. We'll tell you which.
  • We'll help you understand the construction contract before you sign. We recommend having your attorney review it as well.
  • Acting as your own contractor is possible if you're an experienced builder. If you're not, we'll be direct with you about why we advise against it.
Why some things get decided in the field

A home is a project, not a product. There are no prototypes, no second chances. Every site is different, every material combination is unique, and no set of drawings can anticipate everything. Roughly 5 to 10% of design gets resolved on site. That's not a gap in the process; that's the nature of building.

Take window systems. We can spend weeks detailing exactly how a window gets installed, and then your contractor finds a better system, or a less expensive one. If we'd over-documented the original, that work is wasted. Instead, we document design intent and finalize the technical coordination directly with the contractor and fabricators through shop drawings, which we review and approve before anything gets built.

P17 Get in Touch

Ready when you are.

If you have a site, a budget, and a question, we'd like to hear from you. Send us a note and we'll set up a first conversation.

Start a Conversation