A small backyard home where a shed used to stand, lights on at dusk
Backyard homes · DADUs

Her own front door, thirty steps from yours.

A detached second home on the lot you already own. Since 2023 Washington cities inside urban growth areas must allow up to two accessory dwelling units per lot, with no requirement that you live on the property — and the second unit can be sold as its own condominium.

Get my free reportThe report is allowed to say no.
Who does this

Nobody does this for the square footage.

For your parents

Close for Sunday dinner, separate every evening

The alternative is $6,975 a month in assisted living, or a spare room that was never really spare.

For your grown kids

A first place that isn't across the state

57% of 18-to-24-year-olds live with their parents. A second home buys everyone back their privacy.

For income

Rent that helps carry the mortgage

A one-bedroom in Everett rents for a median $1,545 a month. What yours could earn depends on your lot and your city.

For later

A separate address you can sell

State law now lets many cities' ADUs be sold as condominium units. Whether it works on your lot depends on your city, your lender and your title company.

A back yard with an old shed, a stump and a patchy lawn
TodayA shed, a stump, and a lawn nobody uses
The same yard with a small backyard home where the shed stood
What may be possibleSame fence, same trees, one more front door

Illustration, not a rendering of your property. What actually fits on your lot depends on its size, shape, setbacks, utilities, trees and your city's rules — which is exactly what the report works out.

What the report checks for a backyard home

Your city's ADU rules, applied to your parcel.

From public records

Zoning and the ADU standards your city adopted after HB 1337 — how many units, maximum size, height, setbacks, lot coverage, parking, whether owner-occupancy is required (it usually isn't now), and whether a condominium sale is allowed. Then the parcel itself: lot area and shape, the existing footprint, what's left after setbacks, mapped flood, wetland, slope and soil flags, and whether sewer or septic serves the address.

Only on site

Whether a concrete truck and a crane can reach the back of the lot, the health of the trees the code protects, the real condition of the sewer lateral, easements that aren't of record, and what your HOA's covenants say. The report names each of these plainly on page four, and a site visit settles them before anything is proposed.

Sizes and costs, honestly

Roughly 400 to 1,200 square feet. Seven to fourteen months.

The report models three size bands — a compact one-bedroom, a two-bedroom, and a larger two-story — and gives an all-in planning range for the one that fits your lot, with each rate sourced and dated. Recent proposals in this region for comparable homes have run from about $293,000 for a compact unit to the mid-$400,000s for a two-bedroom, two-story home; every proposal excludes permits, utility connection fees and Washington sales tax, and a fixed price comes only after a survey, a site visit and a design.

Design through move-in generally runs seven to fourteen months in this market, with permit review the least predictable part. No timeline on this site is a commitment.

Price examples are working figures from 2026 proposals; HousUp's published price list follows when the builder of record is confirmed. Construction is by [Builder of record — pending], WA contractor reg. [WA contractor reg. no. — pending].

Questions people ask about backyard homes

Do I have to live on the property?

In most Washington cities, no — HB 1337 removed owner-occupancy requirements for cities inside urban growth areas. Your report says which rule your city actually enforces; one or two are still catching up.

How big can it be?

Cities may not cap an ADU below 1,000 square feet under state law, and many allow more. Your lot's setbacks and coverage usually decide it before the cap does.

Can I sell it separately?

State law bars cities from prohibiting condominium sale of an ADU. It still takes a survey, a condominium declaration, a cooperative lender and a title company — the report tells you whether your city and lot make that a realistic path.

Find out what fits on your lot.

One page, two minutes. Your report within the hour.