DADUs & backyard cottages
Detached units built for income, family or flexibility.
King County, Washington · Backed by 35 years in construction
Tell us what you want done.
We'll help with what comes next.
MC Select Co. gives King County homeowners a simple starting point for construction projects. Tell us about your project and we'll review it, determine the appropriate next step, and connect qualified projects with our trusted construction network.
No cost to homeowners · A few minutes · No obligation · Join our professional network
No cost to homeowners. No obligation.
Tell us about your project and we'll help determine the right next step. There's no cost to submit your project or use MC Select Co.'s connection service.
How it works
You don't need to know who to call, understand every construction trade, or know exactly what your project requires. Just tell us what you're trying to accomplish.
- 01
Tell us about your project
Choose the type of project, provide your ZIP code, budget range and timeline, and briefly tell us what you want done.
- 02
We review it
MC Select Co. organizes your project information and reviews what you're trying to accomplish.
- 03
We determine the next step
We determine whether the project fits our construction network and what type of construction support may be appropriate.
- 04
We make the connection
For qualified projects, MC Select Co. connects you with our construction partner or appropriate professionals within our trusted network.
One simple place to start — no contractor lists to sort through. Homeowners are never charged; MC Select Co. is paid by the construction professional after a project is signed.
The projects we're built for
See all project typesHome & second-story additions
More square footage on the house you already own.
Whole-home & major remodels
Coordinated, phased work across the entire house.
Kitchens & major baths
High-impact rooms where scope and budget drift fastest.
Basement & garage conversions
Turning existing space into real living space.
New residential construction
Custom homes on infill and existing lots.
Our network is assembled for projects in roughly the $25,000–$2.5M+ range. If yours sits outside that, we'll tell you plainly.
Some of the work our contractors have done
Backed by 35 years in the construction industry. Homes, additions and DADUs built across King County.
Modern infill residence
New construction · Ground-up single family
Whole-home rebuild with attached garage
New construction · Garage and full interior build-out
Detached cottages (DADU pair)
DADU · Two detached units on one lot
Three-unit townhome row
New construction · Currently in design and permitting
Multi-structure lot redevelopment
New construction + DADU · Currently under way
Why homeowners start here
You don't need to know who to call
You don't have to understand every construction trade or know exactly what your project requires. Tell us what you're trying to accomplish.
An established construction network
We work with an established network of construction professionals and subcontractors serving King County.
A person reviews every project
Your project is reviewed by our team before any connection is made — technology helps organize it, people decide the next step.
King County only
Local zoning, local permitting, local builders. We'd rather be deep in one county than thin across fifty states.
Technology + construction experience
Simple for you, organized behind the scenes
You describe the project in plain language. Our technology helps us organize and understand your project — type of work, location, budget range, timeline and what you're trying to accomplish — so our team can determine the appropriate next step.
Technology never makes the final call. Every project is reviewed by our team, and qualified projects are connected with our construction partner or professionals within its established network based on project needs.
Tell Us About Your ProjectA trusted construction network
We work with an established network of construction professionals and subcontractors serving King County — including designers, permit support, general contractors and specialty trades.
Projects are connected with our construction partner, which brings an existing network of subcontractors and construction professionals.
Professionals within that network are engaged based on the needs of your specific project.
Our team reviews every project before any connection is made.
MC Select Co. provides project intake, qualification, and connection services. Construction services are performed under separate agreements with the applicable construction professional. Project acceptance, pricing, scope, scheduling, and availability are subject to review by the construction provider.
Service area
King County, Washington
We're building depth in one county rather than breadth across the country. If your property is outside King County, you can join the expansion waitlist.
SeattleBellevueKirklandRedmondMercer IslandIssaquahRentonShorelineBothellSammamishNewcastleBurienSeaTacTukwilaKentFederal WayWoodinvilleAuburnDes MoinesKenmoreand other King County communities
An example project journey
You tell us
"I want to add a 700 sq. ft. DADU behind my Seattle house. I have around $250,000 and would like to start next spring."
We review it
We organize the details, look at what the project realistically involves, and check that it fits King County and our construction network.
We determine the next step
Because there are no drawings yet, the appropriate next step is design work — and we make the right connection from there.
How we talk about trust
- MC Select Co. is a front door, not a marketplace — we don't shop your project across competing contractors.
- Every project is reviewed by our team; technology only helps organize the information.
- Next steps are preliminary guidance and can change after professional review.
- We never promise pricing, permit approval or a construction schedule.
- Construction work is performed under a separate agreement with the construction professional.
Common questions
Tell us what you want done. We'll help with what comes next.
Simply tell MC Select Co. what you are trying to accomplish. We'll help determine the next step.
Tell Us About Your Project