In-Law Suite

In-Law Suites in Orange County

A private, accessible suite for parents or adult children — built as a legal ADU on your property.

An in-law suite is an ADU designed for multigenerational living — private, comfortable and often built for accessibility. Here’s how it differs from a standard ADU, how we design for aging-in-place, and what it takes to permit.

In-law suite vs ADU

An in-law suite is an ADU used for family — it can be an attached suite or a standalone unit. The difference is usually in the design: comfort, accessibility and proximity for aging parents or adult children.

Design for multigenerational living

We design single-level layouts with wide doorways, walk-in showers and step-free entries where needed — independence and privacy for your family, on one property.

Permits, cost & timeline

Built as a legal ADU, an in-law suite follows the same OC permit process. We handle the submittal; cost and timeline scale with size, finishes and accessibility features.

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Why build with L Square

Design, permits and construction under one roof. L Square is a licensed Orange County design-build team (CSLB #1095476). One contract covers architecture, engineering, city approvals and our own build crews — so your ADU moves on a fixed schedule from first drawing to final inspection, across Orange County and Los Angeles.

01 · Architect-grade design: Every unit is drawn around your lot, light and privacy.
02 · Permit-ready, OC-savvy: We know each city’s ADU rules and clear the approvals for you.
03 · Built once, built right: Our own crews deliver on a fixed schedule, foundation to finishes.

Licensed · Insured · Bonded · CSLB #1095476 · Orange County & Los Angeles

Frequently asked questions

In-law suite vs ADU vs granny flat?

They’re the same kind of unit — a legal ADU. “In-law suite” and “granny flat” just describe how it’s used; an in-law suite is typically designed for family and accessibility.

Can it be wheelchair-accessible?

Yes — we design for aging-in-place with single-level layouts, wide doors, walk-in showers and step-free access.

Attached to the house or separate?

Either. An in-law suite can be an attached suite sharing a wall, or a detached unit in the yard — we recommend based on your lot and how much privacy you want.

What’s the cost range?

It depends on size, finishes and accessibility features; we give you a firm quote after seeing your property.

Can we rent it later?

Yes — because it’s built as a legal ADU, you can rent it out down the road if your needs change.

Building an ADU in your Orange County city

ADU rules vary by city — we handle the specifics for your address. Statewide, California allows ADUs up to about 1,200 sq ft with 4-ft side and rear setbacks (CA HCD); your city may add its own details. For the statewide rules, see the CA HCD ADU Handbook.

Irvine ADU rules Anaheim ADU rules Santa Ana ADU rules Huntington Beach ADU rules ADU cost guide All areas we serve

Ready to start
your ADU?

Get a free, no-pressure quote from a licensed Orange County design-build team — and a plan drawn around your lot.

Get your free quote→ (949) 374-7980