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ADU guides, page 6

68 guides on what an ADU costs, what the law allows and how to hire well. Every number links to the state law, city page or study it came from.

Money

ADU insurance: homeowners, landlord and builder's risk coverage

How a homeowners policy treats a detached or attached ADU, when a rented unit needs landlord coverage, builder's risk, earthquake and FAIR Plan.

Updated Oct 26, 2026

Liens

Mechanics liens in California: a guide for ADU owners

Preliminary notices, lien deadlines, the four lien release forms and how to keep a lien off your title.

Updated Oct 26, 2026

Contracts

ADU contract checklist for California homeowners

What a home improvement contract must say, the deposit cap, payment schedules, change orders and a signing checklist.

Updated Oct 26, 2026

Building

ADU inspections: the checklist from foundation to final

Every city inspection in order, how to book them in San Diego, what to have ready, failed inspections and the final.

Updated Oct 26, 2026

Family

ADU for seniors: aging-in-place design, grants and taxes

Design dimensions for aging in place, the programs that actually help older owners, reverse mortgages, Prop 19 and property tax for 55+ and 62+.

Updated Oct 26, 2026

Hiring

ADU builder red flags, and what to do when a company fails

Warning signs before you sign and during the build, the $1,000 deposit cap, common ADU scams and steps if your builder shuts down.

Updated Oct 26, 2026

Renting

ADU short-term rental rules in San Diego and California

Whether you can Airbnb an ADU: state law, San Diego's 31-day rule, license tiers, TOT, penalties and the 31-day alternative.

Updated Oct 26, 2026

Renting

Renting out an ADU in California: tenant laws, AB 1482 and leases

AB 1482's exemptions for ADUs, San Diego's Tenant Protection Ordinance, deposit limits, habitability, the lease and ending a tenancy.

Updated Oct 26, 2026