Local ADU Rules

Menlo Park

Last Updated August 29, 2024

ADU Contact:

650.330.6702 – planning@menlopark.org

Standards
Details
Zones allowed

R-E, R-E-S, R-1-S, R-1-S (FG), R-1-U, R-1-U (LM), R-2, R-3, R-4, R-4 (S), R-3-A

Lot Restrictions

Attached, detached, and junior ADUs have specific requirements for each type

Minimum Lot Size

None

Min/Max ADU Size

ADU – Attached and Detached: 1000 square feet
*Attached: Not more than 50% of main home floor area, unless under 800 square feet (state law allows an ADU up to 800 square feet on every property, some exceptions.)
JADU: 500 square feet

ADU Building Height

JADU and Attached: Same as primary dwelling
Detached: larger than 800 square feet: 17 feet, 800 square feet or less: 16 feet

Setbacks

Attached: same as primary residence
Detached: side and rear – 4 feet

Parking Requirements

JADUs: No parking required
ADUs: One spot may be required (tandem allowed). No parking required if:
within one-half mile walking distance of public transit

within an architecturally and historically significant historic district

an interior ADU

ineligible for on-street parking permits, but on-street permits are available

within one block of a car share vehicle

Owner Occupancy

ADUs: Built after Jan 1 2020 – No requirements, otherwise – required unless nontenancy status is granted. JADUs: Owner occupancy required

Sample fees from recent permits

Depends on the specifics of the proposal. No school impact fees for ADUs 500 square feet or smaller. Services provided by other districts/agencies may assess a fee.

Other requirements

Properties developed with a single-family residence may construct up to 2 ADUs, 1 that is detached and 1 that is either attached, interior or junior.

ADU – may have up to 2 bedrooms. JADU – no bedroom restrictions

Daylight plane restrictions may apply.

Depending on ADU size and type, permission to exceed FAR and lot coverage maximums may apply.

Process

Building permit review is required. Making an appointment to meet with a planner in the initial stages of the project can help avoid challenges and is highly recommended.

Exceptions

None

Wondering what you can build?

Make sure you check out our Learning the Rules page for more step-by-step details
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