Building Setbacks & Zoning in Folsom, CA

If you live in Folsom or are thinking about moving there, building setbacks & zoning are one of those things you probably won't think about until they affect you directly. Folsom has 3 specific rules on the books covering different aspects of building setbacks & zoning, and some of them might surprise you.

Structure Height Limits

Folsom caps single-family homes at two stories and thirty-five feet in the large-lot R-1-L district, and at two and one-half stories, still capped at thirty-five feet, in the medium and small-lot R-1-ML and R-1-M districts. The thirty-five-foot ceiling holds across all three zones regardless of the story count allowed.

Key details: R-1-L height limit: 2 stories, max 35 ft (§17.11.110). R-1-ML height limit: 2.5 stories, max 35 ft (§17.12.110). R-1-M height limit: 2.5 stories, max 35 ft (§17.13.110). Binding ceiling: 35 feet in all three districts. Relief mechanism: Variance under Chapter 17.62.

Constructing a residential structure above the thirty-five-foot height limit, or above the story count allowed for the district, is a zoning violation that the community development department can address by withholding final building permit sign-off, requiring plan revisions, or ordering removal of the noncompliant portion of the structure. A property owner seeking to exceed the limit must obtain a variance under Chapter 17.62 or applicable planned development approval before construction; building first and seeking relief afterward does not cure the violation.

Setback Rules

Folsom sets front, side and rear yard minimums separately for each residential zoning district. R-1-L requires a thirty-five-foot front yard, while R-1-ML and R-1-M require twenty feet; all three require a five-foot and an eleven-foot side yard and a rear yard equal to twenty percent of lot depth.

Key details: R-1-L front yard: 35 ft (§17.11.070). R-1-ML / R-1-M front yard: 20 ft (§17.12.070 / §17.13.070). Side yard, all three districts: 5 ft one side, 11 ft other side. Corner lot street-side yard: 20% of lot width, 11-16 ft range. R-1-L rear yard: 20% of depth, 15 ft minimum.

A structure built into a required front, side or rear yard setback is a zoning violation subject to the enforcement provisions of Title 17; the community development department can withhold or revoke a building permit and require removal or relocation of an encroaching structure. Building without first obtaining an approved permit that reflects the correct district setbacks compounds the violation and can trigger a stop-work order until a variance under Chapter 17.62 is approved or the structure is brought into conformance.

Lot Coverage Limits

Folsom caps how much of a residential lot a house can cover, thirty percent of lot area in the large-lot R-1-L district, rising to thirty-five percent in the medium and small-lot R-1-ML and R-1-M districts. In hillside areas, a separate impervious-surface cap of sixty percent of the lot applies to buildings and paving combined.

Key details: R-1-L building coverage: 30% of lot area (§17.11.060). R-1-ML building coverage: 35% of lot area (§17.12.060). R-1-M building coverage: 35% of lot area (§17.13.060). Hillside impervious cap: 60% of lot, buildings + paving. Hillside waiver authority: Planning commission (§14.33.180(A)(6)).

Exceeding the building coverage percentage for a lot's zoning district blocks issuance of a building permit until plans are revised to conform or a variance is granted under Chapter 17.62. In hillside areas, breaching the sixty percent impervious surface cap in Section 14.33.180 without a planning commission waiver is a violation of the hillside development standards ordinance, enforceable under the general penalty and enforcement provisions of Section 14.33.210, which can include stop-work orders and required remediation of unpermitted impervious surface.

The Bottom Line

Folsom's building setbacks & zoning rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Folsom is broadly strict or permissive.

Keep in mind that Folsom can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.