Additions · 09
Extra space, on your terms.
Room additions and ADUs that add real square footage, real value, and a real reason to stay put.
Room additions and ADUs in Los Angeles
Add the room — or the whole second residence.
Whether you need one more bedroom or an independent living unit on the property, Sage n' Slate plans and builds the work end to end. We handle zoning, design, engineering, permits, and construction in a single coordinated process.
ADUs in particular reward careful planning. LA's rules change, the lots vary, and the difference between a smooth project and a stalled one usually comes down to early decisions.
Specialists in LA code
Month typical ADU build
Team, plans to keys
Why homeowners choose us
What you get when one team handles the addition.
Room additions and ADUs both depend on tight coordination between design, engineering, and construction. That's what we're built to do.
Up-to-date fluency with LA ADU rules and pathways
Zoning, setback, and feasibility review early
Architecture, engineering, and build under one roof
Designs that match the primary residence honestly
Honest budgets and timelines from week one
Our process
Plans to keys, in clear phases.
Same considered sequence whether it's a single room or a detached ADU.
Feasibility
zoning, setbacks, utilities, and rough budget
Concept and schematic design
Design development and engineering coordination
Permits and city approvals
Site work and foundation
Framing, systems, envelope, and finishes
Final inspections and handover
What we build
The kinds of additions and ADUs we take on.
Anything that adds livable square footage to a residential property.
- 01Detached ADUs (new construction)
- 02Attached ADUs and junior ADUs (JADUs)
- 03Garage-to-living conversions
- 04Single- and multi-room additions
- 05Primary-suite additions
- 06Home-office and studio additions
Service area
Sherman Oaks and greater Los Angeles.
Sage n' Slate is based in Sherman Oaks and builds additions and ADUs throughout Los Angeles and the surrounding areas.
Service Area
34.05° N / 118.24° WLos Angeles & surrounding neighborhoods.
Common questions
Asked and answered.
How long does an ADU take to build?
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Most detached ADUs run 4–8 months of construction, with 2–4 months of design and permitting beforehand. Garage conversions are usually faster.
Can I build an ADU on my lot?
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California's ADU laws are permissive — most single-family lots in LA can accommodate one. We do a feasibility check early to confirm.
Will the ADU match my existing home?
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It can — same materials, proportions, and roofline — or it can be a deliberate contrast. We design to your preference and the site.
Do you handle permits?
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Yes. ADU permitting in LA has its own pathway, and we manage the submission and review process.
Start a project
Let's talk about your rooms & adus.
Tell us a little about the home and the scope. We'll come back within two business days.