San Diego County Finalizes AB 1033 Framework: August 2026

With a Planning Commission hearing completed on June 12, 2026 and a Board of Supervisors vote tentatively scheduled for August 2026, property owners, builders, and prospective homebuyers are watching closely as the County crafts accessory dwelling unit policies that balance homeownership opportunities against investor interests in what has become California's third jurisdiction to allow condominium conversions.

How This Affects Coastal San Diego Property Owners

While this article focuses on San Diego County's unincorporated areas, understanding County AB 1033 rules is essential for Pacific Beach, La Jolla, and Mission Beach property owners for three strategic reasons:

1. Investment Expansion Beyond City Limits

Many coastal property owners leverage equity from Pacific Beach or La Jolla properties to invest in more affordable County markets. A Pacific Beach homeowner with $600,000 in equity might build an ADU in Fallbrook or Alpine where land costs are 50-60% lower than coastal neighborhoods. Understanding County AB 1033 protections—especially owner occupancy requirements and first-time buyer preferences—becomes critical for cross-jurisdiction investment strategies.

Example: A La Jolla investor with a $1.8M primary residence purchases a $720,000 lot in Alpine, builds a $250,000 ADU, and converts to condominiums under County rules. The total $970,000 investment could yield two separate units worth $850,000 + $475,000 = $1.325M, producing $355,000 profit. But County owner occupancy requirements might delay the sale by 12-24 months compared to City rules.

2. Contractor Business Service Area Expansion

Pacific Beach builders and contractors increasingly work across jurisdictions. Understanding the distinction between City of San Diego AB 1033 implementation (August 2025) and County implementation (April 2026 with August 2026 protections) allows contractors to advise clients accurately on jurisdiction-specific requirements, timelines, and ROI calculations.

Example: A Mission Beach contractor manages a Pacific Beach ADU project (City jurisdiction, no mandatory owner occupancy) and a Ramona ADU project (County jurisdiction, potential 12-month occupancy requirement). The financial modeling differs drastically: the Pacific Beach client can sell immediately after construction, while the Ramona client must factor in 12 months of lost rental income before conversion.

3. Comparative Market Intelligence

Coastal property owners considering ADU construction benefit from understanding County price differentials and market dynamics. Comparing Pacific Beach ADU values ($350,000-$450,000) to County ADU values ($200,000-$300,000) provides context for rental rate expectations, conversion profitability, and optimal investment allocation.

The 120-Day Policy Window: What Changed on July 2, 2026

When the County Board of Supervisors unanimously approved the AB 1033 ordinance on March 4, 2026, they included a critical directive: County staff must return within 120 days with policy recommendations to promote first-time homebuyers and protect existing tenants. That 120-day deadline arrived on July 2, 2026.

The directive specifically called for exploring three key protections:

1. Owner occupancy requirements for either the primary residence or ADU
2. First right of refusal for existing tenants when ADUs are converted to condominiums
3. Purchase preferences for first-time buyers to prevent investor-only markets

According to the County's Planning & Development Services, the Planning Commission held a public hearing on June 12, 2026 to consider these implementation options, with a full Board hearing tentatively scheduled for August 2026. The July 2 deadline represents the completion of the County staff's research and policy development phase, with formal adoption expected within weeks.

Breaking Down the Proposed Condominium Conversion Protections

Owner Occupancy Requirements

Unlike standard accessory dwelling unit construction, which in California no longer allows owner occupancy mandates, AB 1033 condominium conversions may include occupancy requirements as a condition of approval. The County is considering requiring property owners to occupy either the primary residence or the detached unit for a minimum period—potentially one year or longer—before selling as a separate condominium.

This protection aims to prevent speculative "build-to-flip" business models where developers construct units solely for immediate profit. For Pacific Beach and La Jolla area property owners working with builders on County unincorporated properties, construction timelines must account for mandatory occupancy periods before unlocking proceeds. This creates a key distinction: City of San Diego properties (including Pacific Beach, La Jolla, Mission Beach, and Bird Rock) currently have no owner occupancy requirement for AB 1033 conversions, while County properties may require 6-24 months of occupancy.

Tenant First Right of Refusal

One of the most significant proposed protections gives existing tenants first priority to purchase when an owner initiates condominium conversion. This "first right of refusal" means:

• Formal written notice must be provided to tenants well in advance of conversion
• Purchase priority period where tenants can match any bona fide offer
• Price transparency ensuring tenants know the proposed price
• Financing assistance access potentially including County first-time buyer programs

For landlords with existing tenants, this creates a new legal requirement before pursuing condominium conversion. However, it also opens pathways for tenants to transition from renting to owning, particularly in high-cost coastal areas where median home prices reached $915,000 in June 2026 and inventory dropped 29% year-over-year.

First-Time Buyer Purchase Preferences

The County is exploring mechanisms to ensure accessory dwelling unit transactions don't simply create a new asset class for cash investors. Potential first-time buyer preferences include:

• Priority listing periods where only first-time buyers can submit offers
• Down payment assistance integration coordinating with County housing programs
• Income qualification caps targeting workforce housing price points
• Anti-speculation holding periods preventing immediate resale for profit

These protections aim to fulfill AB 1033's original legislative intent: creating affordable homeownership pathways in California's crisis housing market, not generating investor returns.

Jurisdictional Comparison: County vs. City of San Diego

Understanding where AB 1033 applies is critical for property owners and builders operating in the Pacific Beach, La Jolla, and Mission Beach areas.

City of San Diego Implementation

The City of San Diego adopted AB 1033 with implementation beginning August 22, 2025, making it one of California's earliest adopters. City properties within Pacific Beach, La Jolla, Mission Beach, Bird Rock, and areas near Tourmaline Surfing Park fall under City jurisdiction and can already pursue condominium conversions under the City's ordinance.

Pacific Beach Specific Considerations: Most Pacific Beach properties south of Grand Avenue and west of Interstate 5 are within City limits. Properties on streets like Emerald Street, Diamond Street, Garnet Avenue, and Cass Street follow City AB 1033 rules. However, some properties on the eastern edge of the Pacific Beach planning area may fall under County jurisdiction—verification is essential before planning conversion projects.

La Jolla Coastal Overlay: La Jolla properties, particularly those in the Coastal Zone (including Bird Rock and areas near Tourmaline Surfing Park), may require California Coastal Commission approval in addition to City AB 1033 compliance. Coastal properties follow City jurisdiction for AB 1033 rules but may face additional environmental review and coastal development permit requirements that extend timelines by 3-6 months.

County Implementation: Unincorporated Areas Only

The County's ordinance, which went into effect April 4, 2026, applies exclusively to unincorporated San Diego County areas including:

• Fallbrook (North County)
• Alpine (East County)
• Valley Center (North County Inland)
• Ramona (East County)
• Lakeside (East County)
• Spring Valley (South County)
• Plus 101 other unincorporated communities

Property owners must verify jurisdiction before assuming AB 1033 eligibility. A property on the coastal bluffs might fall under City jurisdiction with August 2025 rules, while a similar property just outside city limits follows County jurisdiction with different timeline and protection requirements.

The Davis-Stirling Condominium Conversion Process

Regardless of first-time buyer protections, all AB 1033 transactions require condominium conversion under the Davis-Stirling Act, California's common interest development law. This process includes:

Legal Requirements

1. Subdivision Map Act compliance with local subdivision ordinances
2. Condominium plan recordation establishing separate legal parcels
3. Safety inspection certification before plan recordation
4. HOA formation even for single primary residence + ADU properties
5. CC&Rs drafting defining shared maintenance and responsibilities

Mortgage Lender Consent

One of the most challenging aspects: If there is a mortgage on the property, the lender must provide written consent to the subdivision and sale. This includes both primary mortgage holders and any secondary lenders like HELOCs. In practice, lenders can refuse or impose additional terms to approve the split, creating uncertainty for property owners who assumed automatic conversion rights.

As mortgage rates stabilized at 6.41%-6.63% in July 2026, lender cooperation becomes more predictable, but property owners should negotiate lender consent before investing in conversion costs.

Conversion Cost Expectations

Conversion costs typically range from $15,000-$50,000 including:

• Surveying and legal description preparation
• Attorney fees for CC&Rs and HOA documents
• Inspection costs and code compliance verification
• Utility separation engineering (if required)
• County recording fees and processing costs

For a Pacific Beach accessory dwelling unit costing $250,000 to build, selling as a condominium for $450,000-$500,000 could produce $175,000-$225,000 immediate profit after accounting for conversion costs. Pacific Beach properties (City jurisdiction) currently have no mandatory owner occupancy delay, while County properties may require 12-24 months of occupancy before conversion, significantly altering ROI timelines.

Coastal Investment Comparison Example: A Mission Beach property owner builds an 800-square-foot ADU for $280,000. Under City AB 1033 rules, they can convert immediately and sell for $475,000 (net profit: $170,000 after $25,000 conversion costs). That same property owner also owns a Fallbrook lot where they build an identical unit. Under proposed County rules, they must occupy for 12 months before selling, losing $24,000 in potential rental income, reducing net profit to $146,000. The jurisdictional difference costs $24,000 in opportunity cost.

California's AB 1033 Pioneers: Learning from San Jose and Santa Monica

San Diego County is California's third jurisdiction to implement AB 1033, following San Jose and Santa Monica. Understanding their experiences provides context for County policy development.

San Jose: First Transactions August 2025

San Jose completed California's first ADU condominium sale in August 2025, marking a historic milestone. The 749-square-foot home on Josefina Street near downtown became the first separately-sold ADU in California history, with another three-bedroom, two-bath, nearly 1,200 square-foot ADU priced at just under $1.6 million.

San Jose's experience demonstrated both the opportunity and challenges:

• High sale prices reflecting strong demand for alternative homeownership
• Complex financing requiring specialized lenders familiar with ADU condos
• HOA complications for single-property common interest developments
• Buyer education barriers explaining new property type to traditional agents

Santa Monica: Early Adoption with Local Conditions

Santa Monica opted into AB 1033 in early 2025 with specific local conditions attached, though first transaction details remain unpublished. Their approach—adding local affordability requirements beyond state law—likely influenced San Diego County's consideration of first-time buyer protections.

Builder and Contractor Business Implications of AB 1033

For Pacific Beach and La Jolla builders working on county-jurisdiction properties, the August 2026 finalization of protection policies creates both opportunities and planning requirements.

New Revenue Streams for Pacific Beach and La Jolla Property Owners

Construction projects can now be marketed with three distinct exit strategies, with condominium conversion representing the newest and potentially most profitable option:

1. Traditional rental income - $2,800/month in Pacific Beach, $3,500/month in La Jolla, $3,200/month in Mission Beach, $2,000/month in Fallbrook
2. Property value appreciation - Pacific Beach properties seeing 15-20% ADU value premiums, La Jolla coastal properties 25-30% premiums
3. Condominium sale profit - Pacific Beach ADU conversions: $175,000-$225,000 profit, La Jolla conversions: $225,000-$275,000 profit

This flexibility allows Pacific Beach Builder to offer customized solutions based on client financial goals: retirement income for Bird Rock residents aging in place, legacy wealth building for multi-generational La Jolla families, or immediate liquidity for Mission Beach investors diversifying into County markets.

ROI Calculation Changes

Traditional investment analysis focused on rental yield. ROI calculations showed 8-12% annually from rents, with premium examples:

• 600-square-foot unit costing $200,000 generating $2,500/month = 15% cash-on-cash return
• $90,000 project generating $1,400/month = 18.7% ROI on construction cost
• $75,000 build renting for $1,500/month = 24% cash-on-cash return

Condominium conversion capability adds a new calculation: construction cost + conversion cost vs. sale price minus owner occupancy delay. For a typical county project:

Traditional Rental Model:

• Construction: $250,000
• Annual rent: $30,000 (assumes $2,500/month)
• ROI: 12%
• Payback: 8.3 years

Condominium Conversion Model (with owner occupancy requirement):

• Construction: $250,000
• Conversion: $25,000
• Owner occupancy: 12 months (lost rental income: $30,000)
• Sale price: $475,000
• Net profit: $170,000 ($475k - $250k - $25k - $30k)
• Timeframe: 24 months (construction + occupancy)
• Annualized return: 34% over 2 years

The condominium conversion model offers higher absolute returns but requires more capital, longer timelines, and navigating protection requirements.

Client Education Requirements

Builders must educate clients on:

• Jurisdiction verification (City vs. County rules)
• Protection requirement compliance (occupancy, tenant rights)
• Lender consent negotiation before committing to projects
• Conversion timeline expectations understanding ADU permit timelines and pre-approved plans is critical (6-12 months for condominium mapping)
• HOA ongoing obligations (even for two-unit properties)
• Market timing risks (sale price vs. construction cost inflation)

Market Timing: The Inventory Crisis Context

San Diego County's AB 1033 implementation arrives during an acute housing shortage and affordability crisis. June 2026 data showed median home prices at $915,000 with inventory down 29% year-over-year, creating perfect conditions for alternative homeownership models.

Key market indicators supporting condominium conversions:

• Average 28 days from listing to transaction showing strong buyer demand
• South San Diego sales up 10% indicating expansion market opportunities
• Mortgage rate stabilization at mid-6% range eliminating "wait for lower rates" psychology
• Only 2,125 homes sold in May 2026 (despite population growth) showing supply constraint

Every converted accessory dwelling unit adds one unit to critically low inventory while creating homeownership opportunity at below-median price points. A $475,000 granny flat condo represents nearly 50% discount compared to the $915,000 median detached home.

What Happens Next: August 2026 Board Vote Timeline

Property owners, builders, and prospective buyers should track these milestones:

July 2026: Public Comment Period

Following the July 2 policy development deadline, the County will likely release draft protection policies for public review. Stakeholders including builder associations, tenant rights groups, and affordable housing advocates will submit formal comments.

August 2026: Board of Supervisors Vote

The Board hearing tentatively scheduled for August 2026 will consider adopting specific:

• Owner occupancy requirement duration (6 months, 12 months, 24 months, or none)
• Tenant first right of refusal implementation procedures
• First-time buyer preference mechanisms
• Exemptions for specific property types or circumstances
• Effective date for new protections (immediate vs. phased)

September 2026 and Beyond: Implementation

Once adopted, the County Planning & Development Services will:

• Update AB 1033 application forms and procedures
• Publish guidance documents for property owners and builders
• Train staff on protection verification and compliance
• Begin processing applications under final rules

Property owners with ADU projects in the pipeline should consult with the County to determine whether current applications will be grandfathered under April 2026 rules or subject to new August 2026 protections.