ADU Construction

Timeline is scope-dependent — site conditions, foundation type, ADU type (detached, attached, JADU, conversion), and finish level all affect the schedule. We set a written timeline before construction begins. Pre-construction (design, engineering, permitting) is a separate phase before the build clock starts.

Pricing varies by ADU type, square footage, site conditions, foundation requirements, and finish level. Detached new construction is the highest-cost path. Garage conversions and JADUs are typically lower. Every estimate is written after a site walk — we do not quote ADUs from a phone call.

California permits four ADU types: detached (a standalone unit on your lot), attached (sharing a wall with the main home), garage conversion (existing garage rebuilt as living space), and junior ADU or JADU (a small unit carved out of the existing home). Each has different setback, parking, and engineering requirements.

Short-term rental rules vary by jurisdiction. The City of San Diego restricts short-term rentals (under 30 days) on most ADUs, generally requiring the host to live on the property. Other San Diego County cities have their own rules. Long-term rentals (30+ days) are broadly permitted under California state ADU law and cannot be banned by local HOAs.

Yes. Every ADU requires plans submitted to and approved by your local building department. California state law forces jurisdictions to act on ADU applications within 60 days for ministerial submittals, but actual permit timelines vary by jurisdiction, project complexity, and submittal quality. Permits are a distinct phase before construction starts.

California allows detached ADUs up to 1,200 square feet on most lots, regardless of local zoning that says otherwise. Attached ADUs are typically capped at 50% of the primary home's square footage. JADUs are capped at 500 square feet. Some local rules allow larger units.

Most ADUs in San Diego County recover their build cost through rental income over time and add to the property's resale value through additional gross living area. Appraised value varies by location, finish, and market conditions. We do not provide appraisal estimates.

Common paths include cash-out refinance, home equity line of credit (HELOC), construction-to-permanent loans, and grant programs when available. We do not arrange financing — your bank, credit union, or mortgage broker handles that. We provide the written estimate and construction schedule your lender needs.