Hive ADU
Contact Us

Santa Barbara County Pre-Approved ADU Plans

Hive ADU builds Santa Barbara County’s pre-approved ADUs on unincorporated properties. The County provides the free architectural plans. Hive handles the site engineering, soils analysis, permitting, and construction that those plans don’t cover.

Claim Your Free Property Analysis

Claim Your Free Property Analysis!

We respect your privacy and will never share your information.

100% ADU-Focused · Local ADU Design-Build · CSLB #1146801

What the Santa Barbara County Pre-Approved ADU Program Is

Santa Barbara County launched its free pre-approved ADU plans program in April 2026. The program provides standardized architectural floor plans for accessory dwelling units on unincorporated County properties. Each plan is vetted for County zoning and building code compliance, which reduces design review time, cuts plan check fees, and saves homeowners an estimated $25,000 compared to building a custom ADU. Hive ADU is a 100% ADU-focused local design-build contractor that builds the County’s pre-approved plans across Santa Barbara County’s unincorporated areas.

Homeowners select a plan from the County website at no cost, then submit a permit application through Santa Barbara County’s Planning and Development Department. Hive completes the property-specific work that the County’s plans don’t cover: site plan drawings, a soils report when required, Title 24 energy calculations, a Coastal Development Permit application for parcels in the coastal zone, and full construction.

Santa Barbara County is not the same as the City of Santa Barbara.

The County’s pre-approved plans apply only to unincorporated properties. The City of Santa Barbara, Goleta, Carpinteria, and Buellton each operate separate, designer-led, pre-approved ADU programs. Hive ADU operates within the County’s program structure. Parts of Goleta, Santa Barbara, and Montecito are within the Santa Barbara County Program.

The Four Santa Barbara County Pre-Approved ADU Plans

Santa Barbara County offers four pre-approved ADU floor plans for unincorporated properties. Each floor plan is available in three architectural styles, for a total of twelve approved designs. The County provides the architectural plans at no cost. Hive ADU is the design-build contractor that builds these pre-approved ADUs across Santa Barbara County’s unincorporated areas.

Plan 1: 448 SF Studio / One Bedroom

Reduced Permit Fees

The smallest pre-approved plan. A 448 square foot detached unit configurable as a studio or one-bedroom layout. Suitable for compact unincorporated lots, multigenerational living, or rental income properties where space efficiency matters more than room count.

California Ranch
The pre-approved 448 sqft plan in California Ranch styling carries horizontal lines, low-pitch roof, and indoor-outdoor flow that suit relaxed Santa Barbara County properties with informal landscaping.
Exterior of Santa Barbara County's 448 SF pre-approved ADU Plan 1 in Farmhouse style, available through Hive ADU
Farmhouse
The pre-approved 448 sqft plan in Farmhouse styling features vertical siding, deep eaves, and a covered porch that suit traditional unincorporated Santa Barbara County properties and rural settings.
Mediterranean
The pre-approved 448 sqft plan in Mediterranean styling pairs stucco walls, tile roofing, and arched detailing with Spanish Colonial primary residences common throughout Santa Barbara County.
HIVE ADU HANDLES

Site engineering, soils analysis, utilities, permitting, and construction. The County provides the architectural plans.

Single Contract

Design coordination, permits, and construction under one Hive contract

Reduced Permit Fees

Approximately $3,000 less than a standard ADU permit

30-60 Day Permits

Pre-vetted plans skip the County's design review queue

100% ADU Focused

Local design-build contractor, not a general contractor sideline

Plan 2: 672 SF One Bedroom

Reduced Permit Fees

A 672 square foot detached one-bedroom unit. The most common ADU size for Santa Barbara County homeowners adding a granny flat, in-law unit, or long-term rental space. Balances bedroom comfort with manageable lot impact.

California Ranch
The pre-approved 672 sqft plan in California Ranch styling adapts horizontal massing, low rooflines, and open exterior flow to mid-size Santa Barbara County lots with relaxed character.
Exterior of Santa Barbara County's 672 SF pre-approved ADU Plan 2 in Farmhouse style, available through Hive ADU
Farmhouse
The pre-approved 672 sqft plan in Farmhouse styling adds vertical siding, gabled forms, and a covered porch to a one-bedroom layout that suits traditional Santa Barbara County properties.
Exterior of Santa Barbara County's 672 SF pre-approved ADU Plan 2 in Mediterranean style, available through Hive ADU
Mediterranean
The pre-approved 672 sqft plan in Mediterranean styling brings stucco walls, tile roofing, and arched openings to a one-bedroom layout common to Santa Barbara County's historic property areas.
WHY PRE-APPROVED IS FASTER

Pre-approved plans skip the architectural design phase entirely. Hive moves your project from plan selection to permit submittal in weeks, not months.

No Custom Design Phase

Architecture is already complete and County-approved

Pre-Vetted for Code

Plans meet County zoning and building code standards

~$3,000 Plan Check Savings

Reduced plan check fee through the County program

Local ADU Design-Build

Hive ADU operates entirely within Santa Barbara County

Plan 3: 909 SF Two Bedroom

Reduced Permit Fees

The largest pre-approved plan. A 909 square foot detached two-bedroom unit. Suitable for full-family use, premium rental income, or properties where the ADU functions as a primary or secondary residence. Sites with slopes of 10% or greater may require a soils report.

Spanish
The pre-approved 909 sqft plan in Spanish styling applies stucco walls, terracotta tile roofing, and arched openings to the largest pre-approved plan. Suits estate-grade Santa Barbara County properties with traditional Spanish character.
Exterior of Santa Barbara County's 909 SF pre-approved ADU Plan 3 in Traditional style, available through Hive ADU
Traditional
The pre-approved 909 sqft plan in Traditional styling brings classic American residential detailing to a two-bedroom layout. Pairs with established Santa Barbara County neighborhoods where the ADU should complement an existing traditional primary residence.
Contemporary
The pre-approved 909 sqft plan in Contemporary styling treats the largest plan with clean lines, mixed materials, and modern window placements. Works for Santa Barbara County properties where the ADU should feel current rather than historical.
WHAT HIVE ADU ADDS TO COMPLETE YOUR PROJECT

The County’s pre-approved plans cover the building itself. Hive ADU provides the site engineering, soils analysis, utilities, and site drawings that turn plans into a buildable project.

Site-Specific Engineering

Foundation, structural calculations for your specific lot

Soils Analysis

Required for slopes of 10% or greater on the 909 sqft plan

Utility Routing

Water, sewer, electric, and gas connections to your property

Site Plan Drawings

Required submittal showing the ADU's exact placement on your lot

Plan 4: 768 SF Two / Three Bedroom

Reduced Permit Fees

A 768 square foot detached unit configurable as a two-bedroom or three-bedroom layout. The most flexible pre-approved plan, suitable for larger families, multigenerational households, or properties where bedroom count matters more than total square footage.

Exterior of Santa Barbara County's 768 SF pre-approved ADU Plan 4 in Mid-Century style, available through Hive ADU
Mid-Century
The pre-approved 768 sqft plan in Mid-Century styling brings post-and-beam aesthetics, large windows, and clean roofline geometry to a flexible two or three-bedroom layout. Works for Santa Barbara County properties wanting a distinct architectural identity.
Santa Barbara County's 768 SF pre-approved ADU Plan 4 in Modern style, available through Hive ADU
Modern
The pre-approved 768 sqft plan in Modern styling applies low-slope rooflines, large glass surfaces, and minimal exterior detailing to a flexible two or three-bedroom layout. Pairs with contemporary primary residences across Santa Barbara County.
Modern Farmhouse
The pre-approved 768 sqft plan in Modern Farmhouse styling blends traditional gable forms with clean contemporary detailing. The flexible two or three-bedroom layout suits Santa Barbara County families wanting traditional warmth with current finish levels.
ONE CONTRACT.
ONE ADU CONTRACTOR.

From property review through final inspection, Hive ADU manages every phase of your Santa Barbara County pre-approved ADU under one coordinated design-build contract.

Property Review

Hive ADU confirms eligibility before the ADU plan selection

Permit Coordination

Hive ADU submits permits and manages County back-and-forth

Construction Management

Hive ADU oversees every phase from site prep to final touches

Final Inspection

Hive handles closeout and Santa Barbara County sign-off

Santa Barbara County ADU Eligibility

Three checks determine whether your property qualifies for the County’s pre-approved ADU program: location in unincorporated areas, site conditions such as slope and soil, and exposure to fire or flood hazard zones.

Unincorporated County Properties

Pre-approved plans apply only to properties within Santa Barbara County’s unincorporated areas. Properties inside city limits (Santa Barbara, Goleta, Carpinteria, Buellton) use separate, designer-led city programs and are not eligible.

Property Slope and Soils

Properties with slopes of 10% or greater may require a soils report for the 909 sqft plan. Sites with slopes above approximately 20% are generally unsuitable for pre-approved plans. Hive ADU includes a property review before plan selection to confirm site fit.

Fire and Flood Zone Status

Pre-approved plans apply within the Wildland-Urban Interface (WUI) but exclude properties in the highest-severity fire zones and FEMA’s Special Flood Hazard Zone VE. The County updated WUI boundaries in January 2026. The County’s GIS map shows definitive overlays.

Exterior of Santa Barbara County's 909 SF pre-approved ADU Plan 3 in Spanish style, available through Hive ADU
WHY HIVE ADU

The Only 100% ADU-Focused Local Design-Build Contractor

From property review through final inspection. Hive ADU manages every phase of your pre-approved ADU project. That means site engineering, soils analysis, utility routing, permit submittal, and construction. Hive’s team specializes exclusively in accessory dwelling units across Santa Barbara County. CSLB #1146801, founded by builders with deep ADU project experience.
Schedule My Free Property Analysis

Pre-Approved ADU Process

A clear path from property review to construction completion for your Santa Barbara County pre-approved ADU. Each phase has defined milestones, predictable timelines, and direct coordination with Hive.

Property Review & ADU Plan Selection

Hive confirms pre-approved eligibility by reviewing your property’s slope, fire zone, flood zone, and Coastal Zone status. Then we walk you through the four plan sizes and three architectural styles available, narrowing options based on your property type and goals. No design commitment required at this stage.

Site Engineering and Soils Test Analysis

Hive completes the site-specific work not covered by the County’s pre-approved plans. That includes site plan drawings, utility routing for water, sewer, electric, and gas, soils analysis when required for slopes of 10% or greater, and structural engineering for your property’s conditions.

Permit Submittal & Coordination

Hive submits the complete permit package to Santa Barbara County’s Planning & Development Department. The pre-approved program enables a 30-60 day permit timeline at a $4,200 fixed fee, approximately $3,000 less than standard ADU permits. Hive ADU manages all plan-check responses and County coordination throughout the review.

Construction & Delivery Of Your ADU

Hive builds your pre-approved ADU on your property using local subcontractors and licensed trades. Typical construction takes 6-8 months from break-ground to final inspection. Hive coordinates milestones, quality control, inspections, and County sign-off so the finished ADU is delivered cleanly.

Ready to Get Clarity on Your Property?

Start a Free Property Analysis

Santa Barbara County ADU Cost Factors

The County’s pre-approved plans handle the architecture. Site conditions and Santa Barbara County’s permitting environment affect the rest. Each factor below is assessed during your free property analysis and built into your planning estimate before any contract is signed.

Cost Factor What to Expect in Santa Barbara County
County permit fees Santa Barbara County Planning and Development issues building permits for ADUs in unincorporated areas. Fees vary by project size and scope. Coastal Development Permit fees, when applicable, are assessed separately from standard building permit fees. The applicable fee schedule for your parcel is confirmed during your free property analysis.
Impact fees and the 750 sqft threshold California state law exempts ADUs under 750 sqft from local development impact fees. Plan 1 (448 sqft) and Plan 2 (672 sqft) fall under this exemption. Plan 3 (909 sqft) and Plan 4 (768 sqft) may be subject to proportionate impact fees depending on County rate schedules. Plan check and building permit fees apply regardless of ADU size.
Coastal Development Permit Unincorporated coastal areas of Santa Barbara County require a Coastal Development Permit (CDP) for new ADU construction. The coastal zone covers significant portions of the County's unincorporated coastline. CDP review adds to both permit timeline and total project cost. Whether your parcel falls inside the coastal zone is confirmed during your free property analysis.
Fire hazard zones Large portions of unincorporated Santa Barbara County fall within State-designated Fire Hazard Severity Zones. Properties in High or Very High FHSZ must meet Chapter 7A WUI construction standards: ignition-resistant materials, enclosed eaves, dual-pane tempered windows, and defensible space compliance. These requirements add to material cost.
Site conditions Significant slope, distance to utility connections, soils requiring engineered foundations, or limited site access affect cost. Pre-approved plans are designed for the building, not the site. Site-specific scope is priced after assessment, not estimated from a generic per-sqft range.
HOA and architectural review Some unincorporated Santa Barbara County communities have HOA or architectural review board requirements that run parallel to County permitting. Review timelines vary by association. Whether your parcel is subject to HOA review is confirmed during your free property analysis.
$425-$675

Per Square Foot — Well-Finished Santa Barbara County ADU

A planning benchmark for a well-finished pre-approved ADU on a straightforward site. Estate-grade finishes and complex sites fall outside this range. Hive ADU provides a property-specific estimate after the free property analysis.

Planning & Timing Facts

15
Days

California’s AB 1332 requires permit decisions on pre-approved ADU applications within 30 days of complete submittal.

ADU
Plans

Four standardized County plans are available: 448, 672, 768, and 909 sq ft, in traditional and modern styles.

750
SQ FT

ADUs under 750 sqft are exempt from local development impact fees under California state law.

$25K
Savings

County Planning Director Lisa Plowman estimates that homeowners can save up to $25,000 by using a pre-approved plan.

8-14
Months

From plan selection to certificate of occupancy. Faster than 12-18 months for custom plans.

Frequently Asked Questions

If you are planning an ADU in Santa Barbara County, the most common sources of delay are submitting to the wrong permit authority, missing a Coastal Development Permit requirement that applies to the site, or not identifying a historic district or Landmark condition before design is underway.

The Santa Barbara County Pre-Approved ADU Program offers four free, standardized ADU plans that any homeowner in unincorporated Santa Barbara County can use to build an accessory dwelling unit. The plans were designed by qualified architects and pre-approved by County Planning and Development. Using them skips the standard plan check, reducing permit timelines and fees compared to custom-designed ADUs.

Santa Barbara County provides all four pre-approved ADU plans free to download from the County website. There is no purchase cost for the plans themselves. Construction, permit fees, impact fees, and site-specific engineering are paid separately. Homeowners who use the plans without modification also receive reduced building permit fees.

The four pre-approved plans are available free on the Santa Barbara County Planning and Development website at countyofsb.org. The plan set includes elevations, structural plans, floor plans, and roof plans. The four cards above show each plan with size, bedroom count, architectural style, and approximate build context. Questions about specific plans go to the South Coast Permit Resource Center at 805-568-3030.

Properties in unincorporated Santa Barbara County qualify. The pre-approved plans are not eligible for use inside any of the County's eight incorporated cities: Buellton, Carpinteria, Goleta, Guadalupe, Lompoc, Santa Barbara, Santa Maria, or Solvang. The City of Santa Barbara operates its own separate Pre-Approved ADU Program with different plans and eligibility rules.

A Coastal Development Permit is still required. The pre-approved plans satisfy the County's building code and basic zoning standards, but coastal parcels in unincorporated Santa Barbara County must also obtain a CDP. The coastal zone covers significant portions of unincorporated coastline. CDP review adds to both the permit timeline and total project cost. Whether your parcel falls inside the coastal zone is confirmed during a free property analysis.

It depends on the zone severity. Properties in State-designated High or Very High Fire Hazard Severity Zones must meet Chapter 7A Wildland-Urban Interface construction standards, regardless of the plan used, including ignition-resistant materials, enclosed eaves, dual-pane tempered windows, and defensible space compliance. These requirements increase material costs and may require plan modifications that affect program eligibility. Applicability is confirmed during property analysis based on your specific address.

Santa Barbara County itself notes that pre-approved plans may not be suitable for sites with steep slopes, unstable soils, flood hazards, or other conditions that require special engineering. Properties with these conditions may need a custom plan instead. Hive offers 18 in-house ADU models from 290 to 1,188 square feet, plus full custom design for sites that don't fit the County's pre-approved program.

The pros are speed, lower upfront design cost, and reduced permit fees. The County's plans skip the standard plan check and can save homeowners up to $25,000 in design costs compared to a custom plan, per Santa Barbara County Planning Director Lisa Plowman. The cons are no customization, limited site suitability, and ineligibility inside any incorporated city. The plans work well for standard lots in unincorporated areas. They don't work for properties that need specific design changes or sites with complex conditions.

A pre-approved ADU is site-built from architectural plans that the County has pre-reviewed for code compliance. A prefab ADU is built in a factory and trucked to your property. The County's pre-approved plans are not prefab. Hive ADU builds the County's pre-approved plans on-site using local design-build construction rather than factory-built modular units.

Any changes to the architectural design, including moving a door or window, invalidate the pre-approval and route the project back through standard plan check, which removes the speed and fee advantages. The County's plans must be permitted as designed. Homeowners who want design changes should use a custom plan instead. Hive's 18 in-house models and custom design service handle this path.

Construction cost depends on plan selection, site conditions, finish level, and project scope. Two identical plans on different properties can land $80,000 apart for reasons unrelated to the building itself. Hive doesn't publish per-square-foot ranges because pre-approved plans are designed for the building, not the site. A free property analysis identifies which plans fit your site and provides an accurate estimate based on your specific property.

The total project timeline is 8 to 14 months from plan selection to certificate of occupancy. Permit issuance is faster than custom plans because the standard plan check is already complete. Under California Assembly Bill 1332, pre-approved ADU permit applications must be approved or denied within 30 days of complete submittal. Construction itself runs 4 to 8 months, depending on plan size, site conditions, and finish complexity.

The pre-approved plan covers approximately 80 percent of a complete permit set. Property owners still submit a property-specific site plan, Title 24 energy calculations, a soils or geotechnical report, if required, a Coastal Development Permit application, if the property is in the coastal zone, and grading plans, if site grading is involved. Hive prepares and submits all site-specific documentation as part of the Feasibility and Design Agreement.

Santa Barbara County does not endorse, certify, or require a specific builder. The County offers the plans; homeowners choose who builds. Hive ADU is one qualified option: a 100% ADU-focused local design-build contractor (CSLB #1146801) serving unincorporated Santa Barbara County and the wider region. Property analysis is free and takes about 10 minutes.

Start With a 10-Minute Call

Your first ADU step should be simple. This friendly 10-minute call lets us answer your questions, explain the ADU process clearly and provide honest guidance on your options. If it’s a good fit, we’ll schedule a virtual property review with no pressure and no sales pitch.

Let’s talk.
No pressure, Just answers. Call 805 383 0854