Accessory Dwelling Unit Application (Hillsborough, California)

This is the official Accessory Dwelling Unit Application from City of Hillsborough. You can fill it in its original layout in your browser or with an AI assistant, then download it to review, sign and submit to the agency.

Fill this form Use your assistant

Form details

Issuer: City of Hillsborough
Jurisdiction: Hillsborough, California
Type: Planning and zoning applications
Questions: 109
Last mapping review: 2026-10-03

Official blank PDF from City of Hillsborough ↗

What this form asks

Proposed type of accessory dwelling unit in this proposal (choose one)
Project address
Assessor's Parcel Number (APN)
Lot size (sq. ft.) (number)
Net lot size, if applicable (sq. ft.; for sites with an access easement) (number)
Project description (line 1)
Project description (line 2, continued)
Roof material (manufacturer, style, color)
Exterior materials
Distance from new construction to property line at closest point: Front
Distance from new construction to property line at closest point: Back
Distance from new construction to property line at closest point: Left side
Distance from new construction to property line at closest point: Right side
Height at highest point (feet), from existing grade (number)
Height at highest point (feet), from new/final grade (number)
Total number of bedrooms (or rooms meeting the definition of bedroom) in the accessory dwelling unit (number)
Total number of bedrooms (or rooms meeting the definition of bedroom) in the primary dwelling (number)
Number of on-site parking spaces provided: in garages (number)
Other "open" parking spaces shown (with dimensions) on the plans, not counting back-up space behind garage doors or tandem spaces (number)
Preliminary grading calculations, if applicable: cut (cubic yards) (number)
Preliminary grading calculations, if applicable: fill (cubic yards) (number)
Lot coverage: Structure, existing sq. ft. (number)
Lot coverage: Hardscape, existing sq. ft. (number)
Lot coverage: Landscape, existing sq. ft. (number)
Lot coverage: Total, existing sq. ft. (number)
Lot coverage: Structure, to be removed sq. ft. (number)
Lot coverage: Hardscape, to be removed sq. ft. (number)
Lot coverage: Landscape, to be removed sq. ft. (number)
Lot coverage: Total, to be removed sq. ft. (number)
Lot coverage: Structure, to be added sq. ft. (number)
Lot coverage: Hardscape, to be added sq. ft. (number)
Lot coverage: Landscape, to be added sq. ft. (number)
Lot coverage: Total, to be added sq. ft. (number)
Lot coverage: Structure, TOTAL sq. ft. (number)
Lot coverage: Hardscape, TOTAL sq. ft. (number)
Lot coverage: Landscape, TOTAL sq. ft. (number)
Lot coverage: Structure, % of total lot (number)
Lot coverage: Hardscape, % of total lot (number)
Lot coverage: Landscape, % of total lot (number)
Front yard hardscape calculations (only for work in the front setback): Hardscape, square feet (number)
Front yard hardscape calculations (only for work in the front setback): Hardscape, % of setback area (number)
Front yard hardscape calculations (only for work in the front setback): Landscape, square feet (number)
Front yard hardscape calculations (only for work in the front setback): Landscape, % of setback area (number)
Front yard hardscape calculations (only for work in the front setback): Total, square feet (number)
Front yard hardscape calculations (only for work in the front setback): Total, % of setback area (number)
Floor area (F.A.R.): Basement, existing sq. ft. (number)
Floor area (F.A.R.): First Floor, existing sq. ft. (number)
Floor area (F.A.R.): Second Floor, existing sq. ft. (number)
Floor area (F.A.R.): ADU, existing sq. ft. (number)
Floor area (F.A.R.): Total, existing sq. ft. (number)
Floor area (F.A.R.): Basement, to be removed sq. ft. (number)
Floor area (F.A.R.): First Floor, to be removed sq. ft. (number)
Floor area (F.A.R.): Second Floor, to be removed sq. ft. (number)
Floor area (F.A.R.): ADU, to be removed sq. ft. (number)
Floor area (F.A.R.): Total, to be removed sq. ft. (number)
Floor area (F.A.R.): Basement, to be added sq. ft. (number)
Floor area (F.A.R.): First Floor, to be added sq. ft. (number)
Floor area (F.A.R.): Second Floor, to be added sq. ft. (number)
Floor area (F.A.R.): ADU, to be added sq. ft. (number)
Floor area (F.A.R.): Total, to be added sq. ft. (number)
Floor area (F.A.R.): Basement, TOTAL sq. ft. (number)
Floor area (F.A.R.): First Floor, TOTAL sq. ft. (number)
Floor area (F.A.R.): Second Floor, TOTAL sq. ft. (number)
Floor area (F.A.R.): ADU, TOTAL sq. ft. (number)
Floor area (F.A.R.): Total, TOTAL sq. ft. (number)
Total (proposed) floor area as % F.A.R. (based on lot size, or net lot size if applicable) (number)
Square footage (actual size, all enclosed space at 100%): Basement, existing sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): First Floor, existing sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Second Floor, existing sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): ADU, existing sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Total, existing sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Basement, to be removed sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): First Floor, to be removed sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Second Floor, to be removed sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): ADU, to be removed sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Total, to be removed sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Basement, to be added sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): First Floor, to be added sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Second Floor, to be added sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): ADU, to be added sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Total, to be added sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Basement, TOTAL sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): First Floor, TOTAL sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Second Floor, TOTAL sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): ADU, TOTAL sq. ft. (number)
Square footage (actual size, all enclosed space at 100%): Total, TOTAL sq. ft. (number)
ADU survey: Address
Is your second unit intended to be used for: Family member? (enter X if yes)
Is your second unit intended to be used for: Rental? (enter X if yes)
Is your second unit intended to be used for: Domestic help? (enter X if yes)
Is your second unit intended to be used for: Short stay guest? (enter X if yes)
Is your second unit intended to be used for: Other? (enter X if yes, or a short description)
How many bedrooms are in your second unit? (number)
How many people do you expect to occupy your second unit? (number)
If your second unit is intended for rent, the monthly rent range you intend to initially charge (choose one)
Property address
Property owner title (form says "Please circle"; a mark is placed right after the chosen title) (choose one)
Property owner name(s)
Property owner's mailing address (street or P.O. Box)
Property owner's city, state and ZIP code
Property owner's phone number(s)
Property owner's email address
Project designer/contractor name
Project designer/contractor mailing address (street or P.O. Box)
Project designer/contractor city, state and ZIP code
Project designer/contractor phone number
Project designer/contractor email address
Project designer/contractor Town business license #
Project designer's state license # (blank line below city, state and ZIP)

Review, sign and submit

PaperPorter fills the form but does not submit it or approve anything. Signatures, initials and staff-only areas are left for the right person. Confirm current fees, attachments and filing instructions with City of Hillsborough.

Planning and zoning applications in other places

Planning & Zoning Commission supplemental questionnaire Albany
ADU Amnesty Program Application Albany
Address Change Request Form (for ADU's) Atherton
Fence Variance Application Form Burlingame
Variance Application Form Burlingame
Special Permit General Application Form Burlingame
Special Permit Application R-1 and R-2 Zoning Districts Burlingame
Special Permit Application R-3 and R-4 Zoning Districts Burlingame

Frequently asked questions

Does PaperPorter submit this form?

No. You download the completed PDF, then review, sign and submit it to City of Hillsborough yourself.

Can I fill it without an AI assistant?

Yes. Fill it in your browser and download the completed PDF. An assistant such as ChatGPT or Claude can also ask you the questions and fill it for you.