A custom board-and-batten ADU by John Kinstle, with red-trimmed windows and a craftsman gable
Architect & General Contractor · Greater Bay Area

Timeless ADUs for Bay Area homes.

One person designs and builds your ADU — not two. A rare combination that means clearer decisions, fewer hand-offs, and a finished home that matches the drawing.

40+ yrsIn practice
UC BerkeleyB.Arch, 1975
LicensedArchitect + GC
Bay AreaBuilt locally
A Rare Combination

Architect and general contractor.

Most ADUs require you to hire two separate professionals — and hope they communicate. John is licensed as both. One contract. One point of accountability. One person who has stood on your property, drawn your plans, and will run the build.

The usual way
  • Hire an architect
  • Hire a separate contractor
  • Translate between the two
  • Two contracts, two markups
  • Blame travels in circles
Working with John
  • One licensed architect & GC
  • One contract, one schedule
  • Designed knowing how it will be built
  • Built knowing why it was designed
  • One person responsible — start to finish
Architect
UC Berkeley, since 1975
General Contractor
CA Lic. B-1 #333270
Both, on every project
From first sketch to final key
Design/Build

One discipline. One person. Since 1975.

Why an ADU

More space.
More possibility.

An ADU isn't just an addition. It's a smarter way to use your property — and a quiet investment in how your family lives for the next thirty years.

  • Rental income

    A long-term, durable asset on land you already own.

  • Multigenerational living

    Independence with proximity. Privacy with care.

  • Property value

    Quality, traditional design holds value across decades.

  • Future flexibility

    An office today. A guest house tomorrow. A home later.

Designed with intention — so it feels like part of your home, not an afterthought.

John Kinstle on site in his toolbelt during construction
Why John

Toolbelt on, drawing in hand.

For most of his career John didn't just design the homes — he built them, leading the crew on site himself. He still carries both licenses: architect and general contractor.

That dual experience shows up in every decision:

  • One person designs and builds — no hand-off, no translation
  • Drawings made by someone who knows what it costs to build
  • Details that hold up over time
  • Designs that respect the original home
Read John's story →
The Process

A clear, thoughtful path from idea to keys.

Every project begins as a sketch. From first conversation through final walkthrough, you work with one person who designs and builds — so nothing is lost in translation.

See the four-step process →
Hand-drawn elevation sketch by John Kinstle
Elevation study — pencil on trace, John Kinstle
The Right Fit

Designed for homes with character.

John's work is best suited for:

  • Older Bay Area homes

    Craftsman, Mission Revival, Maybeck-era — the ones with soul.

  • Owners who value design and detail

    Where the joinery, the proportions, the trim all matter.

  • Projects where integration matters

    An ADU that belongs on your lot — not dropped onto it.

In John's words
“I always wore the toolbelt and led the crew on site. By being there every day I could truly design the project down to the last detail.”
John Kinstle · Designer & Builder, since 1975
Begin

Build something that belongs.

An ADU should feel considered — like it was always part of the property. That's the difference thoughtful design makes.

Start your project →
Hillside garden ADU with red-trimmed windows, by John Kinstle