MEP Plans in Laguna Hills, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in Laguna Hills, prepared for plan check at the City of Laguna Hills building department, with Title 24 available in the same order.
Laguna Hills project facts we design around
| County | Orange County |
|---|---|
| Title 24 climate zone | Climate Zone 6, confirmed by ZIP for every project |
| Electric utility (most addresses) | San Diego Gas & Electric (SDG&E) |
| Permit review | The City of Laguna Hills building department |
| ADU permits issued, 2021–2025 | 22 (#352 of 450 cities) |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in Laguna Hills
Laguna Hills issued 22 ADU building permits from 2021 through 2025, the 352nd most among the 450 California cities that reported ADU permits. Permits went from 2 in 2021 to 15 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| 2 | not reported | not reported | 5 | 15 |
Source: California Department of Housing and Community Development, Annual Progress Report data (ADU building permits by year).
Title 24 in Climate Zone 6
- Windows: U-factor 0.30 or lower and solar heat gain coefficient (SHGC) 0.23 or lower, with total window area up to 20% of floor area (west-facing up to 5%).
- Solar PV sized by the CEC formula kW = (floor area x 0.594) / 1000 + 1.23; no PV is required if that is under 1.8 kWdc, which for a single ADU works out to about 960 sq ft or smaller.
Climate Zone 6 requirements in full →
HVAC design for Laguna Hills
The HVAC is sized from a room-by-room Manual J using the outdoor design conditions for the address, in Climate Zone 6's coastal, marine-influenced climate. Right-size the heat pump from a real Manual J instead of a tonnage guess.
Electrical service from San Diego Gas & Electric (SDG&E)
If the load calculation shows you need a service upgrade, a second meter or a relocated service, San Diego Gas & Electric (SDG&E) handles that through its My Project Center portal, separately from the building permit.
ADU electrical service with San Diego Gas & Electric (SDG&E) →
Plumbing and sewer
The plumbing plan shows the route, slope and cleanouts of the connection to the existing sewer lateral.
Pricing is flat statewide: ADU plans from $995, full ADU MEP package from $2,295, Title 24 add-on $240. See what's in a complete ADU MEP set.
Nearby places compared
| Place | Climate zone | Electric utility | ADU permits 2021–25 |
|---|---|---|---|
| Fullerton | CZ 8 | Southern California Edison (SCE) | 2,171 |
| Garden Grove | CZ 8, 6 | Southern California Edison (SCE) | 2,046 |
| Anaheim | CZ 8 | Anaheim Public Utilities | 1,713 |
| Santa Ana | CZ 8 | Southern California Edison (SCE) | 956 |
| Westminster | CZ 6 | Southern California Edison (SCE) | 908 |
| Huntington Beach | CZ 6 | Southern California Edison (SCE) | 437 |
Guides for Laguna Hills projects
Ready for permit-ready MEP plans in Laguna Hills?
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in Laguna Hills; requirements vary by project. Confirm with the City of Laguna Hills building department.