Granny flats
Granny Flat Builder
Granny flat, in-law unit, and backyard cottage all describe the same thing: a private home for a family member, with its own kitchen and bath. Wolf confirms your lot qualifies, then builds the dwelling in our factory, permits it as housing, and sets it on your lot.
Where Wolf works
In Washington and Oregon our own crews do the work. When your lot needs a survey or septic design, we line that up too. Full details →
Who it’s for
Who a granny flat works for
Families who want independence without distance
A granny flat gives a parent or grandparent privacy and a separate household close to family.
Adult children returning home
A permitted backyard home gives an adult child a place of their own instead of their old bedroom.
Owners who want guest space that is also housing
A legal dwelling can house family now and add value to the property later, which a converted shed cannot.
What Wolf builds
How a granny flat is permitted
Permits do not use the term granny flat. Depending on the zone, the unit is permitted as an accessory dwelling, guest house, or hardship unit. Wolf builds prefab, residential-code homes with a full kitchen, bath, living space, and bedroom, and one-story plans are the default. We have set hundreds of backyard homes, and we still measure the setbacks on every lot.
Prefab that is still a house
The home is factory-built, inspected, delivered, and set, so weather does not hold up the structure. Site work still happens on your property.
Turn-key filing
We check zoning and setbacks, draw the site plan, and file the application for you.
Accessible when you ask
Single-level living, wider paths, and bath options are available on request. A granny flat is not automatically ADA.
Process
From lot check to move-in
- 1
Qualify the lot
Zone, coverage, utilities, and whether a detached dwelling is allowed at all.
- 2
Choose the plan for the household
One bedroom works for many granny flats. A second bedroom may be useful for a couple, caregiver, or regular guest.
- 3
Permit the dwelling
The application will say ADU (accessory dwelling unit) or the local equivalent. We file that packet.
- 4
Deliver and set
Foundation, placement, hookups, inspections, keys.
Models
Granny-flat-scale models
Most granny flats we build are Model K or E. We go larger only when the zone allows it and the household needs it.
Look for the rooms and details you’d actually use. We’ll review your property before recommending a layout.
Questions
Frequently asked questions
Is a granny flat different from an ADU?
Can a granny flat be one story?
Will it hurt my relationship with the neighbors?
Can I rent it if family does not move in?
Keep reading
Related Wolf pages
What is an ADU?
Why granny flat, cottage, and ADU are usually one permit family.
ADU builder
Prefab modular accessory dwellings, built in our factory.
In-law suite builder
Wider family uses and future flexibility.
Backyard cottage builder
Factory-built backyard cottages for family, guests, or rent.
Locations
Local notes for the city or county that will review your permit.
See if your lot qualifies for a granny flat
Send the address and who would live there. We will check zoning, setbacks, delivery, and a one-story plan that can be permitted as a home.
Talk with Kelsey, Kirsten, or Lars. They’ll look at your property and answer questions until the choice is clear.
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