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Coronado Homes with ADU, Casita & Guest House

This page is your guide to Accessory Dwelling Units (ADUs) in Coronado, CA. Here you’ll find live MLS listings, local ADU standards and zoning insights for buyers and owners who want casitas, guest houses or multi-generational living in one of San Diego’s most exclusive coastal markets.

Coronado is almost entirely within the Coastal Zone, and many neighborhoods operate under strict design and view-protection rules. That makes a properly permitted ADU or guest house on the island especially valuable from both an appraisal and rental standpoint.

Fun Fact: Coronado’s tight lot patterns and premium coastal land values mean that a legal second unit can be one of the most valuable improvements you can add to an island property.

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⭐ Local ADU Expertise — Jessica Rinaldi: Jessica specializes in coastal entitlement and design review, including how Coastal Development Permit (CDP)Coastal Zone and neighborhood constraints before they write an offer.

Investment Potential: Why Build or Buy an ADU in Coronado?

Coronado ADUs can command premium rental rates. Legal second units on the island benefit from strong demand from military officers, professionals and extended families.
ADUs increase flexibility for luxury multi-gen living. A detached casita or guest suite can support visiting family, caretakers or a long-term guest while preserving privacy in the main home.
State ADU laws still support reduced setbacks in a constrained market. Many ADUs can qualify for 4-foot side and rear setbacks, subject to coastal and design rules, which is critical on compact island lots.
A properly permitted ADU strengthens long-term value. In a high-price coastal market, a legal, high-quality second unit can materially improve appraisal outcomes and resale appeal.

Coronado ADU, Casita & Guest House Listings

Live MLS feed — focused on homes with guest-house or casita-style amenities:

New ADU-capable listings in Coronado appear as the island market updates.

Where Is Coronado, CA?

Coronado is a coastal island city in San Diego Bay, connected to Downtown San Diego by the Coronado Bridge and the Silver Strand, with quick access to beaches, the Hotel del Coronado and NAS North Island.

Coronado ADU & Financing FAQs: What Should Owners Know?

Q: How big can a detached ADU be in Coronado?

A: Detached ADUs in Coronado can generally be built up to 1,200 sq ft under California law, with lot coverage, height limits and coastal design standards determining what is feasible on each parcel.

Q: Is owner-occupancy required for my ADU in Coronado?

A: No. Under California’s AB 976 (effective January 1, 2024), local agencies are prohibited from enforcing owner-occupancy requirements for ADUs. This gives owners and investors flexibility to rent both the main home and the ADU where otherwise allowed by law.

Q: Do Coastal Development Permits (CDPs) affect ADU approval in Coronado?

A: Yes. Because Coronado sits in the Coastal Zone, many exterior changes and new structures, including ADUs, are reviewed for coastal impacts, design, height and neighborhood character, which can influence timing and design.

Q: How do Coronado homeowners usually finance an ADU?

A: Many island homeowners use cash-out refinance, second mortgages or HELOCs to fund ADU construction, and premium rental potential on Coronado can help support the investment.

ADU Planning & Strategy with Solve Lending & Realty

Solve Lending & Realty helps Coronado buyers and owners evaluate coastal zoning, ADU feasibility, rental projections and build-cost scenarios so you know where a second unit makes sense before you commit capital.

San Diego County REALTOR® Jessica Rinaldi leads ADU-focused planning in Coronado, backed by integrated lending strategy and broker support from Kenji Inui and the Solve Lending & Realty team.

How Can I Finance an ADU or Second Unit in Coronado?

ADU Financing Options

Use your existing equity or structure a new purchase loan that anticipates ADU improvements.

Cash-Out to Build ADU Purchase Loans Second Mortgages

See Your Home’s ADU Equity Potential

Check your estimated home value and see how much equity might be available to fund ADU construction or to move into a more ADU-ready property in Coronado.

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