Designed from scratchStarting at $6,500
Custom Plan Set
A project-specific floor plan and architectural production set developed for the property and intended use.
Start with the property report →01 / ADU OVERVIEWDesign
Design
for real life.
California-wide ADU site feasibility, thoughtful design, and clear production fees. Local plan services are available in San Diego and Ventura Counties.
More space. More freedom.Designed and delivered
the right way.
the right way.
02 / OVERVIEWDesigned around
Designed around
how you live.
We create ADU plan sets that feel considered, site-specific, and ready for a clear path through production and review.
Design through completion
One team guiding every step.
ParcelForm can guide and coordinate the complete project—from feasibility and design through consultants, permitting, contractor coordination, construction support, interiors, and final completion. Major decisions are reviewed against the established building budget so cost, quality, and design priorities remain visible throughout the work.
Meet the team behind ParcelForm →Begin at the right level
From one property question to a complete project.
HomeownersFree California Site Report
An instant preliminary PDF covering the statewide ADU baseline and local items to verify.
Generate report →Owners + Professionals$149 Zoning & Site ProfileA parcel-specific report on zoning, overlays, and constraints, reviewed before delivery.
View reports →ConstructionRequest estimatesParcelForm reviews each request before any referral is considered.
Start request →Bennett Design Studio
Custom Plan Set.
An original ADU plan developed for the property, the homeowner’s needs, and the applicable jurisdiction. Plans already pre-approved by local jurisdictions are listed separately in the section below.
A Custom Plan Set is not represented as pre-approved. Every project requires property-specific review and permitting by the applicable jurisdiction.
North County plans and permit resources
Find your city’s ADU starting point.
Review official ADU plans and guidance for Vista, nearby cities, the City of San Diego, and unincorporated San Diego County. Where a qualifying preapproved plan is available, Bennett Design Studio can prepare the site-specific Express Plan production set.
Search all California city galleries →Statewide directory
California Statewide
Search participating cities and plan providers across California.
View official resources ↗Plans availableCounty of San Diego
Standard dwelling-unit plans for unincorporated County properties.
View official resources ↗Plans availableCity of San Diego
Accepted standard and permit-ready ADU plan resources.
View official resources ↗City ADU resourcesVista
Official ADU forms, permit information, and City development resources.
View official resources ↗City ADU guidanceOceanside
Current City ADU requirements, standards, and permit guidance.
View official resources ↗Permit-ready programCarlsbad
Permit-ready plans and program resources for detached, single-story ADUs.
View official resources ↗Permit-ready plansSan Marcos
Preapproved, detached one-story ADU building plans through the City program.
View official resources ↗Permit-ready plansEncinitas
Downloadable permit-ready ADU plans with customizable exterior options.
View official resources ↗Plans availableEscondido
PAADU plans for detached units from 484 to 1,000 square feet.
View official resources ↗City ADU resourcesSolana Beach
Official ADU regulations, submittal guidance, and preapproval-program information.
View official resources ↗Sample floor plansDel Mar
Official ADU guidance, regulations, and sample floor-plan resources.
View official resources ↗City ADU guidancePoway
Current ADU and JADU requirements, applications, and planning resources.
View official resources ↗Not every jurisdiction currently publishes a downloadable preapproved-plan library. Availability, acceptance, and code-cycle status are controlled by each jurisdiction and may change. A preapproved building plan still requires property-specific review, a site plan, applicable consultant information, and a building permit.
Ventura County ADU specialist
ADU plans and permit guidance for Ventura County.
Bennett Design Studio also provides ADU plan production for unincorporated Ventura County, Thousand Oaks, Westlake Village, Camarillo, Simi Valley, and the City of Ventura.
Explore Ventura County ADU services →Standardized plans
County of Ventura
Free standardized detached ADU plans for qualifying unincorporated properties.
View official resources ↗City ADU guidanceThousand Oaks
Official ADU planning, zoning, and online permit resources.
View official resources ↗Two-agency pathWestlake Village
City zoning clearance with Los Angeles County building-permit review.
View official resources ↗City ADU guideCamarillo
Official feasibility, design, permitting, and construction guidance.
View official resources ↗City ADU guidanceSimi Valley
Current ADU standards, planning handouts, and permit resources.
View official resources ↗Standardized plansCity of Ventura
Reviewed one-, two-, and three-bedroom standardized ADU plans.
View official resources ↗Two-county ADU expertise
ADU design and permit planning across San Diego and Ventura Counties.
Every address has a different jurisdiction, zoning context, permit path, and fee schedule. Bennett Design Studio helps homeowners identify the right starting plan and prepare a clear architectural production set for the reviewing agency.
Generate a preliminary ADU permit checklist →City of San DiegoUnincorporated San Diego CountyVistaOceansideCarlsbadSan MarcosEncinitasEscondidoSolana BeachDel MarPowayVentura CountyThousand OaksWestlake VillageCamarilloSimi ValleyCity of Ventura
Unpermitted ADU experience16City of San Diego code-enforcement cases permitted since 2024
A proven path for previously unpermitted ADUs.
Since 2024, Bennett Design Studio has helped obtain permits for 16 City of San Diego code-enforcement cases involving previously unpermitted ADUs. Each property is evaluated individually because existing conditions, records, code compliance, required consultants, and agency review determine the path to approval.
Discuss an unpermitted ADU →Projects in nearby Southern California jurisdictions may also be considered based on scope, property conditions, and local requirements.
A clear path to permit submittal01 02 03 04
Confirm the property. Choose the right plan. Move forward with confidence.
Check the property
We review the address, jurisdiction, lot conditions, access, utilities, and likely approval path before plans begin.
Choose a proven plan
Select the plan that fits the property and household. Minor plan options are priced before work starts.
Produce the plan set
Bennett Design Studio prepares the defined architectural production set for one clear flat fee.
Add only what you need
Consultants, coordination, permit submittal, and plan-check responses remain separate and transparent.
Two clear ways to begin
Choose the right production path.
The fee stays focused on architectural production. Property conditions, consultant work, agency coordination, submittal services, and other work outside the selected package are quoted separately.
Express Plan
Starting at $4,500 using a qualifying city preapproved floor plan
- Selected preapproved plan as the starting point
- Property-specific architectural production set
- Required site-plan information within the architectural scope
- Standard notes and schedules
- Two rounds of agency corrections
Custom Plan
Starting at $6,500 for a new floor plan developed for your needs
- Original Accessory Dwelling Unit (ADU) floor plan and exterior concept
- Defined architectural production set
- Standard notes and schedules
- One owner design-review round
- Two rounds of agency corrections
About plan-check corrections
Both packages include responses to the first two rounds of agency corrections within the original architectural scope. Most projects are resolved within that allowance. Occasionally, an agency introduces new comments, changes its interpretation, requests information beyond the original requirements, or continues review through additional cycles. Because the number and nature of those later comments are controlled by the reviewing agency, work after the second correction round is billed separately at the agreed hourly rate. We will review the comments with you and obtain authorization before proceeding with additional services.
When review comments appear repetitive, inconsistent, unsupported, or beyond a reasonable interpretation of the project requirements, it is often more effective to request clarification or an agency meeting than to continue revising the plans without resolving the underlying issue. A focused discussion with the plan reviewer can identify the applicable code basis, confirm what information is actually required, and establish an acceptable response path. Questioning a comment professionally and seeking a clear agency determination can prevent unnecessary correction cycles, duplicated consultant work, and avoidable cost. Agency meetings, written code analysis, and coordination beyond the included correction scope are provided as separately authorized services.
Feasibility and separate services
Property feasibility is included with either plan path, or it may be completed separately before you decide to proceed. Other services are quoted as needed: boundary or topographic survey · structural, civil, energy, Mechanical, Electrical, and Plumbing (MEP), geotechnical, fire, septic, or other consultants · consultant coordination · agency meetings · permit submittal and processing · owner-requested changes · corrections outside the original scope · construction support
Architectural production timeline
Architectural plans prepared for initial review in approximately 2–3 weeks.
The stated timeline applies only to Bennett Design Studio’s architectural production turnaround. For either the Express Plan or Custom Plan, that period begins after the project parameters are established, the agreement is signed, the retainer is received, and the information needed to begin is complete.
Once the architectural package contains enough information for coordination, it may be submitted for available planning and fire-agency review while also being distributed to the required consultants. During those agency reviews, the structural, civil, energy, and Mechanical, Electrical, and Plumbing (MEP) consultants can develop their drawings and calculations. By the time the early reviews are completed, the remaining consultant sheets may be ready to assemble with the architectural set for coordinated building and engineering review.
This parallel schedule allows agency review and consultant production to move forward at the same time instead of waiting for each task to finish before the next begins. When the project and reviewing agencies allow it, this approach can reduce the overall elapsed schedule, limit repeated coordination, and help control avoidable professional-service costs.
Some straightforward Accessory Dwelling Unit (ADU) projects may be ready sooner. Planning, fire, consultant, building, correction, and permit-issuance timelines are controlled by the applicable agencies and consultants and are not included in the architectural production estimate. Parallel processing is subject to each jurisdiction’s intake requirements and does not guarantee approval or a specific permit date.Optional package addition
Carry the plan through the interiors.
Via Rosa Design Studio is available as the interior-design consultant for homeowners who want a coordinated architectural and interior package.
Interior Design Consultant
Via Rosa Design Studio
5.040 reviews on Houzz- Kitchen and bathroom design
- Cabinetry and built-in development
- Material, finish and fixture selections
- Lighting and decorative coordination
- Furniture and interior styling, when requested
Interior-design scope, schedule and fees are provided separately and added only when requested.
Add interior design to my inquiryThe right first step
Before you buy plans, make sure the plan belongs on your lot.
Use the ADU Permit Path tool to identify likely agencies, plans, consultants, code checks, zoning checks, and mapped property constraints. A fixed-fee feasibility review can then verify the parcel before a full plan agreement is signed.
Build my preliminary checklistSan Diego ADU questions
Clear answers before plan production begins.
These are the questions homeowners most often ask when comparing a preapproved Express Plan with a Custom ADU Plan Set.
What does a San Diego ADU plan set cost?
The Express Plan starts at $4,500 when a qualifying jurisdiction preapproved plan can be used. A Custom Plan starts at $6,500 for an original layout developed for the property and homeowner.
Can Bennett Design Studio adapt a city preapproved ADU plan?
Yes. When the property and selected plan qualify, the Express Plan uses the jurisdiction plan as the starting point and adds the property-specific architectural production information needed for submittal.
How long does ADU plan production take?
Production for initial permit submittal is generally estimated at two to three weeks after project parameters are established, the agreement is signed, the retainer is paid, and required information is complete. Straightforward projects may sometimes be ready sooner.
Are consultants, permit fees, and city coordination included?
No. Engineering, surveys, specialty consultants, agency fees, permit processing, meetings, and coordination outside the defined architectural production scope are quoted or paid separately.
Which San Diego communities do you serve?
ParcelForm provides California-wide preliminary site-feasibility screening, with expanded local plan services in Vista and nearby North County communities, the City of San Diego, and unincorporated San Diego County.
Do you provide ADU plans in Ventura County?
Yes. Bennett Design Studio provides ADU plan production for unincorporated Ventura County, Thousand Oaks, Westlake Village, Camarillo, Simi Valley, and the City of Ventura, including site-specific work based on qualifying standardized plans.
Can you help permit an unpermitted ADU in San Diego?
Yes. Since 2024, Bennett Design Studio has helped obtain permits for 16 City of San Diego code-enforcement cases involving previously unpermitted ADUs. Every property is different, so the path depends on existing conditions, available records, code compliance, required consultants, and City review.