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
Residential Fire Sprinkler Checklist Residential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building DOC (157 KB)
Change in Use or Occupancy Classification Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (195 KB)
Electric Vehicle Charger Checklist Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelPlanning and Building PDF (325 KB)
Plan Resubmittal Guidelines Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsBuilding Department HandoutsPlanning and Building PDF (183 KB)
Residential Pool/Spa Information Residential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (291 KB)
Permit Extension Request Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsBuilding Department HandoutsPlanning and Building PDF (278 KB)
Accessory Dwelling & Junior Accessory Dwelling Requirements Residential Building InfoAdditionsNew ConstructionRepair, RemodelPlanning and Building PDF (250 KB)
As Built Plan Check and Inspections Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (229 KB)
Electronic File Preparation Standards Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (268 KB)
CALGreen Building Design and Construction Verification Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelPlanning and Building PDF (207 KB)
Residential Replacement Windows Residential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsBuilding Department HandoutsPlanning and Building PDF (260 KB)
Solar PV Storage Battery Requirements Residential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsBuilding Department HandoutsPlanning and Building PDF (221 KB)
BAAQMD Demolition Permit Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionBuilding FormsBuilding Department Handouts PDF (64 KB)
Variance Application Checklist AdditionsNew ConstructionPlanning Division Forms PDF (221 KB)
Specific Plan/Zoning Amendment Application Checklist AdditionsNew ConstructionProperty UsesPlanning Division Forms PDF (172 KB)
Lot Line Adjustment/Merger Application Checklist Residential Building InfoAdditionsNew ConstructionPlanning Division Forms PDF (196 KB)
General Plan Amendment Application Checklist AdditionsNew ConstructionProperty UsesPlanning Division Forms PDF (210 KB)
Building Height Calculation Handout Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionPlanning Division Forms PDF (166 KB)
Address Change Application Form AdditionsNew ConstructionPlanning Division Forms PDF (66 KB)
Water Use Efficiency Improvements Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (258 KB)
Tankless Water Heater Information Residential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (212 KB)
Special Inspector Application Commercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (196 KB)
Soils Report Information Commercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionInstallationsBuilding FormsPlanning and Building PDF (208 KB)
Smoke Alarm Location & Info – Residential Commercial Building RequirementsStorageAdditionsNew ConstructionRepair, RemodelFire PreventionBuilding FormsPlanning and Building PDF (270 KB)
Smoke & Carbon Monoxide Alarm Self Verification Form Residential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsFire PreventionBuilding FormsPlanning and Building PDF (227 KB)
Site Plan Sample Commercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (72 KB)
Lighting Standards – Residential Residential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (4.2 MB)
Solar Photovoltaic Requirements Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsPlanning and Building PDF (254 KB)
PEX Use Requirements Commercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (206 KB)
Impact and Capacity Fee Refund AdditionsNew ConstructionBuilding FormsPlanning and Building PDF (101 KB)
Lead Abatement Information Residential Building InfoAdditionsRepair, RemodelBuilding FormsPlanning and Building PDF (472 KB)
Cool Roofs Requirements Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (228 KB)
Permit Checklist – Commercial Commercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (206 KB)
Grading & Drainage Info – Commercial Commercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (220 KB)
Handrail Info – Commercial Commercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (253 KB)
Building Permit Application-Owner/Builder Residential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding ApplicationsPermit Application FormsBuilding Department Handouts PDF (367 KB)
Building Permit Application-Contractor Commercial Building RequirementsLandscaping & TreesAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding ApplicationsPermit Application Forms PDF (143 KB)
Parcel or Subdivision Checklist AdditionsNew ConstructionPlanning and Building PDF (448 KB)
SPAR Trash Enclosure Standards AdditionsNew ConstructionRepair, RemodelPlanning and Building PDF (309 KB)
SPAR Parking Standards AdditionsNew ConstructionPermit Application FormsPlanning and Building PDF (477 KB)
SPAR Checklist AdditionsNew ConstructionPermit Application FormsPlanning and Building PDF (274 KB)
Sewer Lateral Replacement Application AdditionsRepair, RemodelPublic Works PDF (242 KB)
Unreasonable Hardship Application Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelPlanning and Building PDF (129 KB)
Cost Recovery Form Landscaping & TreesAdditionsNew ConstructionProperty UsesPlanning Division Forms PDF (178 KB)
Construction & Demolition Debris Recycling Form Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsBuilding Department HandoutsFormsPlanning and Building PDF (248 KB)
Planning General Application AdditionsNew ConstructionProperty UsesPermit Application FormsPlanning and Building PDF (160 KB)
Special Inspection and Testing Procedure Commercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (366 KB)
Special Inspection Approved Agencies Commercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (130 KB)
Construction Drawings General Information Commercial Building RequirementsResidential Building InfoStarting a BusinesssignsLandscaping & TreesAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding Department HandoutsPlanning and Building PDF (226 KB)
Permit Checklist – Residential Residential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (223 KB)
Addition/Remodel Info – Residential Residential Building InfoAdditionsRepair, RemodelBuilding FormsPlanning and Building PDF (245 KB)
Retaining Wall Detail – Standard Residential Building InfoLandscaping & TreesAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (257 KB)
Handrail and Stairs Info – Residential Residential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (426 KB)
Fee Information Residential Building InfoAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (212 KB)
Sea/Land (Containers) Cargo Boxes Used as Storage Buildings Commercial Building RequirementsResidential Building InfoAdditionsBuilding FormsPlanning and Building PDF (227 KB)
Grading & Drainage Info – Residential Residential Building InfoLandscaping & TreesAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (227 KB)
Gas Pressure Tests – Information Residential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (218 KB)
Garage and Carport Construction Information Residential Building InfoAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (234 KB)
Construction Info – Residential AdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (289 KB)
Foundation Work Information Handout Residential Building InfoAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (203 KB)
Carbon Monoxide Alarms Residential Building InfoAdditionsNew ConstructionFire PreventionBuilding FormsPlanning and Building PDF (217 KB)
How to Get a Building Permit Commercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding Department HandoutsPlanning and Building PDF (235 KB)
Guidelines for Plan Organization and Sheet Identification Commercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (117 KB)
Planning Fee Schedule Landscaping & TreesAdditionsNew ConstructionRepair, RemodelProperty UsesShort Term RentalsPlanning Division FormsBuilding Department HandoutsPlanning and Building PDF (186 KB)
photo of house deck addition


Be sure to 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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