Pre-Submission Review · Free

Addition Plan Check

Fresno, CA

Additions are where setback and height violations happen most often. Your existing house was built compliant — but adding square footage changes the math on lot coverage, FAR, and setbacks. What was legal before may not be legal after the addition. A second-story addition, for example, can trigger increased side setback requirements in many cities.

  • Calculate combined lot coverage (existing footprint + proposed addition)
  • Check FAR impact — second stories don't change coverage but affect FAR significantly
  • Verify increased side setback requirements for two-story construction
  • Confirm parking isn't displaced by the addition footprint

Project Location

Building Dimensions

Setbacks

Coverage & Parking

Additional Notes

Home Addition in Fresno: What You Need to Know

Additions are where setback and lot coverage violations happen most often. Your existing house was compliant when built — but adding square footage changes the math on lot coverage, FAR, setbacks, and parking. What was legal before may not be legal after an addition.

Critical checks for additions in Fresno:

  • Lot coverage impact — Your addition's footprint adds to the existing building footprint. If the combined coverage exceeds Fresno's limit (typically 40–50%), the addition will be denied without a variance.
  • FAR recalculation — A second-story addition doesn't change lot coverage but significantly impacts FAR. Calculate total floor area (existing + proposed) against your zone's FAR limit before designing.
  • Side setback increases for two-story — Many cities require additional side setbacks for two-story construction. A ground-floor addition may be fine at 5' from the property line, but a second story might need 7–8'.
  • Parking displacement — If your addition eliminates existing parking (like building over a driveway pad), you may need to provide replacement spaces elsewhere on the lot.
  • Existing nonconformities — If the original house already violates current setbacks or height limits (legal nonconforming), an addition cannot extend the nonconformity. The new portion must fully comply with current codes.

Enter your combined dimensions (existing + proposed) in the form above. We'll check the total project against Fresno's current codes so you know where you stand before hiring an architect.

How Plan Check Works in Fresno

01

Enter your project details

Fill in the form above with your lot size, setbacks, building height, and other dimensions — the same numbers on your architectural plans.

02

We check against Fresno codes

Your project is compared against Fresno's specific zoning requirements — setbacks, height limits, lot coverage, parking ratios, and FAR limits for your zone.

03

Get a prioritized report

Critical violations, warnings, and advisory items — ranked by what a Fresno plan checker will flag first. Fix issues before you submit and save weeks of correction cycles.

Fresno Zone Requirements

Zone Front Side Rear Height Coverage
RM — Residential Multi-Family 15' 5' 20' 40' 50%
RS-3 — Residential Single-Family (3,000 sf) 10' 5' 15' 35' 60%
RS-5 — Residential Single-Family (5,000 sf) 15' 5' 20' 35' 50%

Frequently Asked Questions

What setbacks does Fresno require for home addition projects? +

Fresno requires a 15' front setback, 5' side setback, and 20' rear setback in the most common residential zone. Specific requirements vary by zone — enter your zone code above for exact numbers.

How long does Fresno plan review take? +

Initial plan review in Fresno typically takes 4-8 weeks. If corrections are required, each resubmission adds another 2-4 weeks. Running a pre-check before submitting can eliminate the most common correction items and save one or more review cycles.

What is the maximum building height in Fresno? +

The most common residential zone in Fresno allows a maximum height of 40 feet. Height measurement methods vary — some cities measure to the highest ridge, others to the midpoint of the roof. Check the specific zone requirements for your property.

Is this plan check tool free? +

Yes. Create a free account to run unlimited plan checks against Fresno's building codes. The tool checks setbacks, height limits, lot coverage, parking requirements, and flags common issues that Fresno plan reviewers look for.

What are the most common addition plan check corrections in Fresno? +

The most frequently flagged items in Fresno include: Extreme heat — Title 24 envelope and HVAC sizing critical; Valley air quality district (SJVAPCD) construction mitigation required; Front setback 15' for RS-5 — often confused with 20'. Our tool checks for all of these automatically.