Accessory dwelling unit

A second home,
out back.

Detached ADUs to 1,200 sf, attached ADUs, and junior ADUs (JADUs) to 500 sf. We handle California ADU code, setbacks, parking exemptions, and utility connections in-house.

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Del Mar Detached ADU: Detached ADU in Del Mar, CA (2022) by Apex WorksDel Mar, CA · 2022
What it includes

Feasibility, plans, permit, and the building.

We start with a feasibility memo (lot, zoning, setbacks, easements, utilities). Then schematic design, construction documents, structural engineering, plan check, and construction. ADUs typically run 6–10 months from groundbreak under California's streamlined ADU process.

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Standard ADU plans

Start with the facade.

Six starting points, one photo each. Open any model for its floor plan, interiors, and dimensioned drawings.

600 sq ft model

The 600

Compact one-bed with an efficient footprint.

  • 1 bed
  • 1 bath
View The 600
640 sq ft model

The 640

One-bed with a generous living room and walk-in shower.

  • 1 bed
  • 1 bath
View The 640
690 sq ft model

The 690

Roomier one-bed with a flexible great room.

  • 1 bed
  • 1 bath
View The 690
800 sq ft model

The 800

Two-bed, two-bath family layout.

  • 2 beds
  • 2 baths
View The 800
1000 sq ft model

The 1000

Two-bed plan with an open living area and generous covered deck.

  • 2 beds
  • 1 bath
View The 1000
1200 sq ft model

The 1200

Two-bed, two-bath with a large great room.

  • 2 beds
  • 2 baths
View The 1200
Custom ADU

Your lot. Your plan.

If a standard footprint does not fit the site or the way you want to live, we will shape one around both. Then we carry it through engineering, permits, and construction.

Plan a custom ADU
How we work

One team, beginning to end.

01
Feasibility

We pull lot data, check zoning and HOA, and confirm what your lot allows under state and local ADU code. One-page memo with a preliminary unit size and budget range.

02
Design + permit

Schematic through CDs, structural engineering, Title 24 energy, and plan check. California's mandated 60-day ADU review keeps this predictable.

03
Build

Foundation, framing, MEP, finish. Typical detached ADU is 6–10 months on site. Two-year warranty plus ten-year follow-up check-in.

Selected work

Recent homes.

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Frequently asked

Common questions.

How big can an ADU be in California?+

Detached ADUs: up to 1,200 sf statewide. JADUs (junior ADUs, within the existing home footprint): up to 500 sf with a separate entrance and an efficiency kitchen. Local cities can allow more. San Diego allows two ADUs on most single-family lots.

How long does it take to build an ADU?+

Feasibility and design: 2–4 months. Permit: 60 days statewide max for ADU plan check. Construction: 6–10 months for a detached ADU on a typical lot. Total from kickoff: roughly 11–17 months.

What does an ADU cost in San Diego?+

Every ADU is priced after feasibility. Size, finish level, site conditions, utility runs, and service requirements all shape the scope. We review those with you first, then give a project-specific proposal instead of a one-size-fits-all number.

Do I need a parking space for an ADU?+

Often no. California exempts ADUs from on-site parking if the lot is within half a mile of public transit, in a historic district, or part of an existing structure conversion. We check this in feasibility.

Can I rent the ADU on Airbnb?+

Depends on the city. San Diego currently restricts short-term rentals on ADUs in most zones. Long-term rental (30+ days) is allowed everywhere ADUs are. We flag the local rule during feasibility.

Where in California do you build ADUs?+

San Diego County, Orange County, and Los Angeles County. Recent ADU work in Del Mar, Costa Mesa, and across San Diego.

Prefer to talk?

We reply same day.

Direct
+1 (858) 667-0800support@meetapx.com
Service area
San Diego County
Orange County
Los Angeles County
Licensed
CSLB #1144953
Architecture, electrical, and plumbing in-house
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