Design · 2 min read · November 22, 2024 · 303 words
Designing an ADU you actually want to live in
Twelve design moves that separate a great 700 sq ft ADU from a generic one — most cost nothing extra, all of them protect your re-sale and rental value.
Key takeaways
- Plan for two exposures in every primary room — corner windows on the kitchen are free.
- Use 8-ft minimum ceilings everywhere; 9-ft in the main living space if structure allows.
- Specify a transom or clerestory above the front door — your foyer will read as a real room.
On this page
Most ADUs in LA are functional. A small share of them are also delightful. The difference is rarely in the budget — it is in twelve choices made early, before the drawings are stamped. Most of these moves are free; all of them survive the Title 24 envelope rules.
Light
- Plan for two exposures in every primary room — corner windows on the kitchen are free.
- Use 8-ft minimum ceilings everywhere; 9-ft in the main living space if structure allows.
- Specify a transom or clerestory above the front door — your foyer will read as a real room.
Storage
- Wall-to-wall pantry beats an island in a small kitchen.
- Full-height bedroom closets, ideally walk-in even at 700 sq ft.
- Under-stair storage is free real estate on two-story units.
Acoustics
ADUs are small enough that sound bounces. Soft surfaces (rugs, upholstery, drapes) and STC-rated party walls make a noticeable difference for tenant retention — and tenant retention is where the rental yield math actually compounds.
Outdoor connection
- Size and locate outdoor space only after confirming setbacks, coverage, drainage, access and intended use.
- Treat any roof deck as a separate structural, guard, access, privacy and planning question; a flat roof alone does not make it approvable or ready for future use.
- Specify a hose bib and a 20A exterior outlet on the patio side.
Things you can defer
Designer light fixtures, premium tile, custom millwork — easy upgrades after move-in. Don't let your initial finish budget be the reason your project goes over. Use the cost anatomy to see which line items reward early restraint.
Sources
- California Title 24, Part 6 — Energy Code · California Energy Commission
- California Building Code (Title 24, Part 2) · California Building Standards Commission
- ADA Standards for Accessible Design · U.S. Department of Justice
- LADBS ADU Information Bulletin · LA Department of Building and Safety
Next chapter · 01 of 03
Design · 3 min read
Title 24 for ADUs: what actually triggers compliance
How California's energy code quietly improves — and constrains — every one of these design moves.
What California's Title 24 Part 6 energy code means for a new ADU: compliance paths, heat pumps, fenestration, envelope and the CF1R documentation.
Continue your read · the editorial path
We chained these chapters in the order LA homeowners actually need them. Each one picks up where the last one left a question open.
02 / 03
Design · 3 min
Detached, attached, or conversion: choosing the right ADU type
A property-first framework for comparing detached, attached, and conversion paths without guessing parcel eligibility, cost, or timing.
Read chapter →03 / 03
Finance · 3 min
How to research an ADU rent scenario in Los Angeles
A cautious way to compare long-term, mid-term and short-term rental assumptions using current local evidence and a complete operating-cost model.
Read chapter →