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Vallejo · Building on your lot

Building on a hillside in Vallejo

Vallejo's own rules on building on a hillside, with the code text for every value.

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Each rule below links to the section of the Vallejo Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Vallejo's code says

Vallejo code What Vallejo's code adds
Soils or geology report
  • Soils and geotechnical studies are required.
    Applies: All Hillside Development Permit applications; the applicant pays for the city's peer review.
    § 16.212.02 · code text
    All applications for a Hillside Development Permit, shall include, in addition to the requirements of Chapter 16.606, a soils and geotechnical studies prepared by a qualified licensed geotechnical engineer and engineering geologist.
  • The studies may be waived.
    Applies: When the city engineer finds no significant hillside impact, or that enough information already exists.
    § 16.212.02 · code text
    This requirement may be waived if the city engineer determines that the project, because of its size, location, or design, will not have a significant impact on the hillside, or that sufficient information already exists, and further analysis is not necessary.
Grading and retaining walls
  • No steeper than 30%.
    Applies: Slopes created or changed by grading on hillside parcels, those averaging 15% or more.
    § 16.212.02 · code text
    Slopes created or altered by grading shall not exceed thirty percent;
When hillside rules apply
  • An average slope of 15% or more.
    Applies: All development on such parcels needs a Hillside Development Permit.
    § 16.212.02 · code text
    A Hillside Development Permit shall be required for all development on any parcel where the average slope is fifteen percent or greater

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

What extra rules apply to a hillside lot in Vallejo?

Vallejo's code: An average slope of 15% or more. (All development on such parcels needs a Hillside Development Permit.) (§ 16.212.02); No steeper than 30%. (Slopes created or changed by grading on hillside parcels, those averaging 15% or more.) (§ 16.212.02).

General information, not legal advice.

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Vallejo Municipal Code — full text