Lake Forest · Building on your lot
Building on your lot in Lake Forest
Lake Forest's city code sets fence and wall heights by setback and controls home businesses. Accessory structures fall under the rules of the R1 and RS single-family districts.
Key points
- Fence height: City code limits fences to 3.5 feet within the front yard setback and 6 feet in interior side or rear setbacks.
- Home businesses: A home business may use at most 20% of the home's floor area and have 2 customers at a time; only residents may work.
- Accessory structures: City code has accessory use and structure rules for the R1 and RS single-family districts (§ 9.44.060 and § 9.48.060).
Each rule below is marked Lake Forest code or CA state law and links to the section it comes from (checked October 2026). General information, not legal advice.
Fences and walls
| Height anywhere on the lot |
|
|---|---|
| Front yard height |
|
| Side and rear yard height |
|
| Permit |
|
Running a business from home
| Space used |
|
|---|---|
| Customer visits |
|
| Employees |
|
| Businesses not allowed |
|
Lot splits under SB 9
| How the lot may be divided |
|
|---|---|
| Minimum new lot size |
|
| Standards |
|
RV and boat parking
| Parking on the street |
|
|---|
Solar panels and EV chargers
| EV charger permit |
|
|---|---|
| Solar permit process |
|
Pets, chickens and bees
| Large animals |
|
|---|
Other Lake Forest rules on this
Lake Forest's code also has these chapters. We have not summarized their values on this page yet; read them in the library.
- Accessory uses and structures in the R1 district (§ 9.44.060) — single-family district
- Accessory uses and structures in the RS district (§ 9.48.060) — residential single-family district
- Pools, spas and pool equipment (§ 9.144.080.4)
Who this affects
Frequently asked questions
How tall can a fence be in Lake Forest?
City code limits fences to 3.5 feet within the front yard setback and 6 feet in interior side or rear setbacks.
How big can a shed or accessory building be in Lake Forest?
City code has accessory use and structure rules for the R1 and RS single-family districts (§ 9.44.060 and § 9.48.060). Lake Forest also has a related rule: Accessory uses and structures in the R1 district (§ 9.44.060) — single-family district; Accessory uses and structures in the RS district (§ 9.48.060) — residential single-family district.
Can I run a business from my home in Lake Forest?
A home business may use at most 20% of the home's floor area and have 2 customers at a time; only residents may work.
Can I split my lot under SB 9 in Lake Forest?
Lake Forest's code: Each new lot must be between 40% and 60% of the original lot area. (Applies to each lot created by the split.) (§ 7.50.050); Each new lot must be at least 1,200 square feet. (Applies to each lot created by the split.) (§ 7.50.050).
Can I park an RV or boat at my home in Lake Forest?
Lake Forest's code: RVs may park for up to 72 hours. (Non-commercial RVs on residential streets; other vehicles over 22 feet long, trailers and similar oversized vehicles may not park on public streets.) (§ 12.16.070); Only temporarily, while actually loading or unloading. (Oversized vehicles (over 22 feet long, trailers and similar) loading or unloading people or property on a public street.) (§ 12.16.070).
Do I need a permit for solar panels or an EV charger in Lake Forest?
Lake Forest's code: Approved with all needed permits when the application meets the checklist and safety standards; no energizing before City approval. (Applies to EV charging station permit applications.) (§ 8.74.040); Staff issue a nondiscretionary permit when a complete application meets the approved checklist, standard plan and this chapter. (Small residential rooftop solar systems, unless the Director decides a use permit is warranted.) (§ 8.72.070).
Can I keep chickens or bees at my home in Lake Forest?
Lake Forest's code: Livestock need a strong fence; wire fences need 3 tight barbed wires, one at least 4 feet up, or equal. (§ 10.12.090); Animals may not run loose or graze on public land, highways or others' land without written consent. (§ 10.12.080).
General information, not legal advice.
Ask about a specific Lake Forest property
Ask GoCodebook how these rules apply to your address and get an answer that cites the section.
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