Know your property. Plan your permit.
16 California-focused tools for permit research, parcel checks, ADU feasibility, site-plan preparation and project budgeting.
Begin with the permit, not the paperwork.
The requirements checker helps you identify likely questions for your project. Follow it with parcel research and a drawing checklist.
Address → Rules → Drawings
Find the right agency. Confirm site constraints. Collect the plans and documents the application may need.
Start with the permit question
The quickest way to begin when you know the project but not the exact drawings or approvals.
Permit Requirements Checker
See which permit questions apply to your property and project before preparing drawings.
Do I Need a Site Plan?
Answer a few project questions to understand when a site plan is commonly requested.
ADU Feasibility Checker
Screen a potential accessory dwelling unit for early feasibility and questions to verify.
Understand the property
Work from parcel records and zoning research rather than assumptions about the property.
Zoning & Setback Lookup
Find the relevant zoning source and identify setback questions for your jurisdiction.
Parcel Map & APN Lookup
Locate parcel research resources and organize the property information needed for plans.
SB 9 Eligibility Checker
Review preliminary eligibility factors for qualifying two-unit projects or lot splits.
Get the drawings organized
Turn your project details into a clearer checklist, area calculation, or preliminary review.
Site Plan Checklist Generator
Create a project-focused list of plan information to gather before a permit submission.
Lot Coverage Calculator
Compare building area, lot area, and a preliminary coverage or buildable-area estimate.
Site Plan Pre-Check
Run a free manual site-plan readiness checklist. AI file inspection is only available if the optional connection is configured.
Impervious Surface Calculator
Estimate counted impervious and remaining pervious area from roofs, paving and removal amounts.
Floor Area Ratio (FAR)
Calculate existing and proposed qualifying floor area relative to your parcel size.
Plan costs and respond to comments
Estimate early costs, then organize corrections if a reviewing agency requests changes.
Site Plan Cost Calculator
Estimate a planning range based on scope, site complexity, and available records.
Permit Fee Estimator
Build a preliminary permit and plan-check fee budget before confirming local charges.
Permit Correction Analyzer
Organize reviewer comments and identify the drawings that may need corrections.
Scale & Distance Calculator
Convert paper measurements to actual site distances, including reduced printing.
Grading Slope Calculator
Calculate signed grade, rise, fall and horizontal-to-vertical slope.
A useful starting point, not a permit decision.
Results are preliminary. Building departments, planning agencies, recorded property documents, and qualified professionals control final code interpretations, fees, setbacks and permit approvals. Some tools may request an email to deliver a detailed report.
Have an address and a project in mind?
Send your plans, survey or city comments. We’ll review the available information and help define the right drawing scope.