Permit-ready drafting for Castro Valley ADUs, additions, remodels and new homes — drawn to fit Alameda County's zoning and building requirements, since Castro Valley is unincorporated and permits go through the county rather than a city hall.
Castro Valley isn't its own incorporated city — it's an unincorporated community, which means your permit doesn't go through a Castro Valley city hall. It goes through Alameda County's planning and building departments, under the county's zoning ordinance rather than a city-specific one. That trips up homeowners who assume the process works the same way it does in neighboring incorporated cities. Alameda County has its own setback, height and ADU standards for Castro Valley, and its own submittal checklist, and plans drawn against the wrong jurisdiction's assumptions get flagged. We draw Castro Valley projects against the county's actual requirements from the start.
Detached, attached and junior ADU plans sized and sited to Alameda County's setback, height and lot-coverage rules for Castro Valley parcels, with the state ADU allowances applied correctly.
Room and second-story addition drawings coordinated with Alameda County's height and zoning standards for unincorporated Castro Valley.
Interior and exterior remodel drawings for kitchens, baths and whole-house renovations, including scope that triggers a full county plan check submittal.
Ground-up custom home drawings and garage-to-living-space conversions prepared for Alameda County submittal.
We review your lot, existing structure and goals, and confirm the Alameda County zoning constraints specific to your Castro Valley parcel.
Full construction drawing set — site plan, floor plans, elevations, sections and details — prepared to Alameda County's submittal checklist.
Energy compliance and, where needed, structural review coordinated into the same submittal package.
If Alameda County comes back with corrections, we revise and resubmit — we don't disappear after the first drawing set goes out.
Two decades drawing plans across the East Bay, including unincorporated communities that permit through the county rather than a city.
Drawings prepared under professional design standards, not just CAD line work.
Castro Valley follows Alameda County's zoning ordinance and ADU rules, not a neighboring city's — we confirm the current county standard before we draw.
You work directly with the person drawing your plans, from first sketch through plan check corrections.
Con base en San Jose, trabajamos en los condados de Santa Clara, San Mateo y Alameda, y todo el Bay Area.
No. Castro Valley is an unincorporated community, so it doesn't have a city hall or a city building department. Permits for Castro Valley projects are reviewed by Alameda County's planning and building departments under the county's zoning ordinance.
It depends on the project. Many single-family ADUs, additions and remodels in Castro Valley can be permitted with drafted plans alone, but structural elements — retaining walls, second-story additions, some new construction — often require a licensed engineer's stamp. We'll tell you upfront whether your project needs one.
Turnaround varies by submittal volume and project scope — simple ADU plans generally move faster than full remodels or new construction. We can't promise the county's timeline, but drawings prepared against the county's actual checklist are the biggest lever on how many correction cycles you go through.
Most Castro Valley single-family lots qualify for at least one ADU under state and Alameda County rules, subject to setback, height and lot-coverage limits that vary by zoning district. We confirm eligibility for your specific parcel during the site walk before we draw anything.
Both, if you want it bundled. We prepare Title 24 / CF1R energy compliance documentation alongside the architectural drawings so the whole package is coordinated and submitted together — see our Title 24 & CF1R services for details.
A site address, rough scope of what you want to build, and — if it exists — a copy of your current property survey or existing floor plan. If you don't have a survey, we can help you get one.
Cuéntenos qué quiere construir y le responderemos con los próximos pasos — normalmente dentro de un día hábil.
(408) 634-6655
Yuna Drafting
