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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, 707-778-4472 or petalumaplanning@cityofpetaluma.org.

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, 707-778-4472 or petalumaplanning@cityofpetaluma.org.

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
Demolition PermitCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionBuilding FormsBuilding Department Handouts PDF (64 KB)
Plan Review InfoCommercial Building RequirementsResidential Building InfoStarting a BusinesssignsLandscaping & TreesAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding Department HandoutsPlanning and Building PDF (185 KB)
Variance Application ChecklistAdditionsNew ConstructionPlanning Division Forms PDF (136 KB)
Specific Plan/Zoning Amendment Application ChecklistAdditionsNew ConstructionProperty UsesPlanning Division Forms PDF (263 KB)
Lot Line Adjustment/Merger Application ChecklistResidential Building InfoAdditionsNew ConstructionPlanning Division Forms PDF (291 KB)
General Plan Amendment Application ChecklistAdditionsNew ConstructionProperty UsesPlanning Division Forms PDF (320 KB)
Cost Recovery FormLandscaping & TreesAdditionsNew ConstructionProperty UsesPlanning Division Forms PDF (267 KB)
Building Height Calculation HandoutCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionPlanning Division Forms PDF (159 KB)
Address Change Application FormAdditionsNew ConstructionPlanning Division Forms PDF (135 KB)
Water Use Efficiency ImprovementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (187 KB)
Tankless Water Heater HandoutResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (106 KB)
Swimming Pool, Spa, and Hot Tub Barriers – Requirements forCommercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (107 KB)
Special Inspector ApplicationCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (116 KB)
Special Inspection Approved AgenciesCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (121 KB)
Special Inspection and Testing ProcedureCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (357 KB)
Soils Report InformationCommercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionInstallationsBuilding FormsPlanning and Building PDF (107 KB)
Smoke Detectors LocationsCommercial Building RequirementsStorageAdditionsNew ConstructionRepair, RemodelFire PreventionBuilding FormsPlanning and Building PDF (139 KB)
Smoke & Carbon Monoxide Alarm Self Verification FormResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsFire PreventionBuilding FormsPlanning and Building PDF (108 KB)
Site Plan SampleCommercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (92 KB)
Sea/Land (Containers) Cargo Boxes Used as Storage BuildingsCommercial Building RequirementsResidential Building InfoStorageAdditionsBuilding FormsPlanning and Building PDF (106 KB)
Retaining Wall Detail – StandardResidential Building InfoLandscaping & TreesAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (154 KB)
Residential Stairs and Handrail InformationResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (422 KB)
Residential Permit ChecklistResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (102 KB)
Residential Lighting StandardsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (221 KB)
Residential Construction InformationAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (257 KB)
Residential Addition/Remodel InformationResidential Building InfoAdditionsRepair, RemodelBuilding FormsPlanning and Building PDF (119 KB)
Photovoltaic (Solar) RequirementsCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsPlanning and Building PDF (81 KB)
New PEX Use RequirementsCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (93 KB)
Non-Residential Lighting Testing RequirementsCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (53 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)
How to Get a Building PermitCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsTelecommunication FacilitiesBuilding FormsBuilding Department HandoutsPlanning and Building PDF (218 KB)
Guidelines for Plan Organization and Sheet IdentificationCommercial Building RequirementsResidential Building InfoLandscaping & TreesAdditionsNew ConstructionRepair, RemodelInstallationsTelecommunication FacilitiesBuilding FormsPlanning and Building PDF (96 KB)
Grading & Drainage InfoResidential Building InfoLandscaping & TreesAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (188 KB)
Gas Pressure Tests – InformationResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (188 KB)
Garage and Carport Construction InformationResidential Building InfoAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (194 KB)
Foundation Work Information HandoutResidential Building InfoAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (188 KB)
Fee InformationResidential Building InfoAdditionsNew ConstructionBuilding FormsPlanning and Building PDF (190 KB)
Cool Roofs RequirementsCommercial Building RequirementsResidential Building InfoAdditionsNew ConstructionRepair, RemodelBuilding FormsPlanning and Building PDF (221 KB)
Commercial Permit ChecklistCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (199 KB)
Commercial Handrail InformationCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (220 KB)
Commercial Grading & Drainage InformationCommercial Building RequirementsAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsPlanning and Building PDF (183 KB)
Carbon Monoxide AlarmsResidential Building InfoAdditionsNew ConstructionFire PreventionBuilding FormsPlanning and Building PDF (99 KB)
Permit Application-Owner/BuilderResidential Building InfoAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding ApplicationsPermit Application FormsBuilding Department Handouts PDF (150 KB)
Permit Application-ContractorCommercial Building RequirementsLandscaping & TreesAdditionsNew ConstructionRepair, RemodelInstallationsBuilding FormsBuilding ApplicationsPermit Application Forms PDF (44 KB)
Parcel or Subdivision ChecklistAdditionsNew ConstructionPlanning and Building PDF (448 KB)
Planning General ApplicationAdditionsNew ConstructionProperty UsesPermit Application FormsPlanning and Building PDF (239 KB)
SPAR Trash Enclosure StandardsAdditionsNew ConstructionRepair, RemodelPlanning and Building PDF (386 KB)
SPAR Parking StandardsAdditionsNew ConstructionPermit Application FormsPlanning and Building PDF (720 KB)
SPAR ChecklistAdditionsNew ConstructionPermit Application FormsPlanning and Building PDF (371 KB)
Encroachment Permit Info SheetEncroachment PermitAdditionsNew ConstructionRepair, RemodelInstallationsPublic Works PDF (191 KB)
Sewer Lateral Replacement ApplicationAdditionsRepair, RemodelPublic Works PDF (242 KB)
Planning Fee ScheduleLandscaping & TreesAdditionsNew ConstructionRepair, RemodelProperty UsesTelecommunication FacilitiesShort Term RentalsPlanning Division FormsBuilding Department HandoutsPlanning and Building PDF (185 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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