# John Kinstle Design and Build

> Custom accessory dwelling units (ADUs) and traditional residential
> homes designed and built by John Kinstle — a UC Berkeley
> architectural designer and licensed California general contractor
> serving the greater San Francisco Bay Area since 1975.

John Kinstle is both the architectural designer and the licensed
general contractor on every project. One person, one contract, one
relationship from the first sketch on a napkin to the final walk-
through. The practice specializes in ADUs that look like they were
always part of the property — built in the spirit of the original
house, not added onto it.

## Key facts

- **Business:** John Kinstle Design and Build
- **Principal:** John Kinstle — B.Arch UC Berkeley (1975), CA General
  Contractor License B-1 #333270
- **Service area:** Greater San Francisco Bay Area (Alameda, Contra
  Costa, Marin, San Francisco, San Mateo, and Santa Clara counties)
- **Address:** 37 Holly Ln, El Sobrante, CA 94803
- **Phone:** (510) 882-9927
- **Hours:** Monday–Saturday, 8:00 AM – 5:30 PM (closed Sunday)
- **Website:** https://sfbayareaadu.com
- **Approach:** Design/build — one professional from concept through
  construction
- **Experience:** Designing and building homes since 1975
- **Also known as:** John Kinstle / ADU, Kinstle ADU

## Pages

- [Home](https://sfbayareaadu.com/): Custom ADUs designed and built by
  John Kinstle across the Bay Area.
- [About John Kinstle](https://sfbayareaadu.com/about): Biography and
  fifty-year design/build practice.
- [Process](https://sfbayareaadu.com/process): The four-step
  design/build workflow from consultation to final walkthrough.
- [Portfolio](https://sfbayareaadu.com/portfolio): Gallery of built
  ADUs, custom homes, and architectural details.
- [Blog — Notes from the Jobsite](https://sfbayareaadu.com/blog):
  Essays on design, build, and craft.
- [Design and Build vs Architect then Contractor](https://sfbayareaadu.com/blog/design-and-build-vs-architect-then-contractor):
  Why one relationship beats handing your project off halfway through.
- [The Right People for the Job](https://sfbayareaadu.com/blog/the-right-people-for-the-job):
  On hiring experienced subcontractors year after year.
- [The Spirit of the Jobsite](https://sfbayareaadu.com/blog/the-spirit-of-the-jobsite):
  On the dust, steam, and enthusiasm of actually building.
- [Contact](https://sfbayareaadu.com/contact): Schedule a consultation
  for your Bay Area ADU.

## Optional

- [Expanded reference (llms-full.txt)](https://sfbayareaadu.com/llms-full.txt):
  Deeper descriptions of services, service area, credentials, and FAQ.
- [Privacy](https://sfbayareaadu.com/privacy): Privacy policy.