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Additions

Adding-on to Your Home or Business?

Make sure you understand the full scope of your project before you start. Additions can trigger fees, code upgrades and more that can cost money and add time to your project.

Impact Fees

When you add square footage to your property, you will be required to pay fees to cover additional costs borne by the community for that square footage. Sometimes changes in use can also trigger fees.  To learn more, you should check with the Planning Division, 707-778-4470 or [email protected].

Parking

Changes in the use of your property and expansions may trigger additional parking requirements.  Off street parking requirements are established in the Implementing Zoning Ordinance.  You should check with the Planning Division, 707-778-4470 or [email protected].

Code Upgrades

Depending the extent of your remodel, you may need to upgrade your project to meet new codes.  This could include ADA Accessibility, fire, energy, plumbing among others.  The building code will be updated in 2020 and could trigger other requirements.  You will need to make sure you work with your architect and engineer to be sure your project will meet the requirements.

Fire Sprinklers

Often, additions can changes of use will trigger the need to install fire sprinklers.  This is true for residential and commercial projects.  Fire sprinklers add cost and time to your project.  You should be sure you understand your requirements and plan ahead.  You may need to upgrade your water connections as well.

For info about sprinkler requirements, see the Fire Prevention Bureau page or call 707-778-4389.

To find out whether you will need to upgrade your water connection to install fire sprinklers, call 707-778-4546.

Site Plan and Architectural Review (SPAR)

Sometimes Commercial and Residential additions trigger Site Plan and Architectural Review.  For more info go to the SPAR page.

Addition Handouts

NameCategoryDownload
Solar PV Storage Battery RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsBuilding Department HandoutsPlanning and Building PDF (221 KB)
CALGreen Building Design and Construction VerificationCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelPlanning and Building PDF (197 KB)
Accessory Dwelling & Junior Accessory Dwelling RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelPlanning and Building PDF (250 KB)
Construction & Demolition Debris Recycling FormCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsBuilding Department HandoutsFormsPlanning and Building PDF (248 KB)
BAAQMD Demolition PermitCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionBuilding FormsBuilding Department Handouts PDF (64 KB)
Lead Abatement InformationResidential Building InfoAdditionsRepair, RemodelBuilding FormsPlanning and Building PDF (472 KB)
Impact and Capacity Fee RefundAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (101 KB)
Parcel or Subdivision ChecklistAdditionsNew ConstructionPlanning and Building PDF (448 KB)
Sewer Lateral Replacement ApplicationAdditionsRepair, RemodelPublic Works PDF (242 KB)
Tankless Water Heater InformationResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (212 KB)
Swimming Pool, Spa, and Hot Tub Barriers – RequirementsCommercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (107 KB)
Smoke & Carbon Monoxide Alarm Self Verification FormResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsFire PreventionBuilding FormsPlanning and Building PDF (227 KB)
Soils Report InformationCommercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionInstallationsBuilding FormsPlanning and Building PDF (208 KB)
Smoke Alarm Location & Info – ResidentialCommercial Building RequirementsStorageAdditionsNew ConstructionRepair, RemodelFire PreventionBuilding FormsPlanning and Building PDF (270 KB)
Site Plan SampleCommercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (72 KB)
Retaining Wall Detail – StandardResidential Building InfoLandscaping & TreesAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (252 KB)
Handrail and Stairs Info – ResidentialResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (421 KB)
Cost Recovery FormLandscaping & TreesAdditionsNew ConstructionProperty UsesPlanning Division Forms PDF (168 KB)
Construction Info – ResidentialAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (257 KB)
Solar Photovoltaic RequirementsCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsPlanning and Building PDF (254 KB)
Plan Review InfoCommercial Building RequirementsResidential Building InfoStarting a BusinesssignsLandscaping & TreesAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding Department HandoutsPlanning and Building PDF (228 KB)
PEX Use RequirementsCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (206 KB)
How to Get a Building PermitCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsTelecommunication FacilitiesBuilding FormsBuilding Department HandoutsPlanning and Building PDF (235 KB)
Grading & Drainage Info – ResidentialResidential Building InfoLandscaping & TreesAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (223 KB)
Gas Pressure Tests – InformationResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (214 KB)
Guidelines for Plan Organization and Sheet IdentificationCommercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionRepair, RemodelInstallationsTelecommunication FacilitiesBuilding FormsPlanning and Building PDF (117 KB)
Foundation Work Information HandoutResidential Building InfoAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (202 KB)
Variance Application ChecklistAdditionsNew ConstructionPlanning Division Forms PDF (221 KB)
Fee InformationResidential Building InfoAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (208 KB)
Cool Roofs RequirementsCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (228 KB)
Permit Checklist – CommercialCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (206 KB)
Grading & Drainage Info – CommercialCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (220 KB)
Handrail Info – CommercialCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (253 KB)
General Plan Amendment Application ChecklistAdditionsNew ConstructionProperty UsesPlanning Division Forms PDF (210 KB)
Carbon Monoxide AlarmsResidential Building InfoAdditionsNew ConstructionFire PreventionBuilding FormsPlanning and Building PDF (213 KB)
Building Height Calculation HandoutCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionPlanning Division Forms PDF (166 KB)
Address Change Application FormAdditionsNew ConstructionPlanning Division Forms PDF (66 KB)
Lighting Standards – ResidentialResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (4.2 MB)
Planning General ApplicationAdditionsNew ConstructionProperty UsesPermit Application FormsPlanning and Building PDF (116 KB)
Addition/Remodel Info – ResidentialResidential Building InfoAdditionsRepair, RemodelBuilding FormsPlanning and Building PDF (244 KB)
Garage and Carport Construction InformationResidential Building InfoAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (229 KB)
SPAR Trash Enclosure StandardsAdditionsNew ConstructionRepair, RemodelPlanning and Building PDF (309 KB)
SPAR Parking StandardsAdditionsNew ConstructionPermit Application FormsPlanning and Building PDF (477 KB)
SPAR ChecklistAdditionsNew ConstructionPermit Application FormsPlanning and Building PDF (274 KB)
Water Use Efficiency ImprovementsCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (258 KB)
Permit Checklist – ResidentialResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (222 KB)
Special Inspection and Testing ProcedureCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (368 KB)
Building Permit Application-Owner/BuilderResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding ApplicationsPermit Application FormsBuilding Department Handouts PDF (367 KB)
Building Permit Application-ContractorCommercial Building RequirementsLandscaping & TreesAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding ApplicationsPermit Application Forms PDF (143 KB)
Sea/Land (Containers) Cargo Boxes Used as Storage BuildingsCommercial Building RequirementsResidential Building InfoAdditionsBuilding FormsPlanning and Building PDF (224 KB)
Encroachment Permit Info SheetEncroachment PermitAdditionsNew ConstructionRepair, RemodelInstallationsPublic Works PDF (129 KB)
Planning Fee ScheduleLandscaping & TreesAdditionsNew ConstructionRepair, RemodelProperty UsesTelecommunication FacilitiesShort Term RentalsPlanning Division FormsBuilding Department HandoutsPlanning and Building PDF (184 KB)
Specific Plan/Zoning Amendment Application ChecklistAdditionsNew ConstructionProperty UsesPlanning Division Forms PDF (172 KB)
Lot Line Adjustment/Merger Application ChecklistResidential Building InfoAdditionsNew ConstructionPlanning Division Forms PDF (196 KB)
Special Inspector ApplicationCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (196 KB)
Special Inspection Approved AgenciesCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (129 KB)
photo of house deck addition


You should make sure you get all the permits you need before you start your project.  Some projects may trigger fees are upgrades that may increase costs.

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