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Nucave Construction

Design · Permit · Build

ADU Builder in San Marcos, CA

Nucave is a licensed ADU builder serving San Marcos. One team designs, permits and builds your ADU, start to finish.

  • Licensed CA contractor, CSLB #1013360
  • Design, permits and construction under one roof
  • Based in Vista, in business since 2016
San Marcos ADU Rules & Zoning

Get a free San Marcos ADU consultation

Tell us where to reach you. We usually reply within one business day.

Do you own this property?

Prefer to talk? (760) 310-2393

Building in San Marcos

What we handle for your San Marcos ADU

Every city plays by different rules. These are the ones that shape an ADU here.

The 10-foot separation rule

San Marcos asks for 10 feet eave-to-eave between a detached ADU and the main house, wider than neighboring cities. On tighter lots this one rule often decides the placement, so we check it first.

Two-story setbacks

Two-story designs move your side and rear setbacks from 4 feet to 5 feet. We size and place the unit so the second story works on your lot.

No owner-occupancy requirement

A standard ADU in San Marcos does not require you to live on the property, so it works as a pure rental investment.

How it works

One team from lot check to keys

No handoffs between a designer, an expediter and a contractor. We own every step.

  1. 1

    Lot check

    We review your parcel against San Marcos rules: size, setbacks, utilities and any coastal or fire overlays.

  2. 2

    Design and engineering

    Floor plan, elevations, structural and Title 24, designed around how you will use the unit.

  3. 3

    San Marcos permits

    We submit to the City of San Marcos, answer every correction and keep your permit moving.

  4. 4

    Build to keys

    One crew, one point of contact, through final inspection and move-in.

Client reviews

What ADU clients say about Nucave

“Nucave was a lifesaver after another contractor was fired. The workmanship was exceptional, the price was competitive, and the materials were top of the line. They had my back in every way.”
Monica M., Custom ADU
“Nucave brought my ADU vision to life. I had a dilapidated detached garage with many issues, and they guided me in the right direction and helped me overcome obstacle after obstacle with the city of San Diego. They did everything they said they would do and more.”
Dustin V., Garage conversion ADU, San Diego
“Love my new ADU, every detail's exquisite, and I was shocked at how quickly it was done. Vaulted ceilings with skylights make mornings magical. Ryan and his team are absolutely amazing: efficient, attentive, meticulous. If you want a luxury ADU, not a prefab paper-thin build, it's quality.”
Shannon C., Luxury ADU build
Read all reviews

San Marcos ADU questions

Before you hire an ADU builder

It depends on size, type, site work and finishes. Under California law, ADUs under 750 sq ft pay no impact fees. Our ADU cost planner gives you a range in about two minutes, and a free consultation turns that into a real number for your lot.

Free consultation

Ready to build your San Marcos ADU?

Thirty minutes with a licensed ADU builder who knows the San Marcos rules. No pressure, no obligation.

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