MEP Plans in Big Bear City, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in Big Bear City (unincorporated San Bernardino County), prepared for plan check at San Bernardino County Land Use Services – Building & Safety, with Title 24 available in the same order.
Big Bear City project facts we design around
| County | San Bernardino County (unincorporated) |
|---|---|
| Title 24 climate zone | Climate Zone 16, confirmed by ZIP for every project |
| Electric utility (most addresses) | Bear Valley Electric Service |
| Permits issued by | San Bernardino County Land Use Services – Building & Safety |
| ADU permits issued, 2021–2025 | 17 |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in Big Bear City
San Bernardino County issued 17 ADU building permits from 2021 through 2025 for addresses in Big Bear City, based on the county's reports to the state. Permits went from 2 in 2021 to 3 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| 2 | 1 | 6 | 5 | 3 |
Source: California Department of Housing and Community Development, Annual Progress Report data (ADU building permits by year).
Title 24 in Climate Zone 16
- Windows: U-factor 0.27 or lower (no SHGC limit in this zone), with total window area up to 20% of floor area.
- Solar PV sized by the CEC formula kW = (floor area x 0.59) / 1000 + 1.22; no PV is required if that is under 1.8 kWdc, which for a single ADU works out to about 983 sq ft or smaller.
Climate Zone 16 requirements in full →
HVAC design for Big Bear City
The HVAC is sized from a room-by-room Manual J using the outdoor design conditions for the address, in Climate Zone 16's mountain climate with cold, snowy winters. Cold-climate heat pump sized for the local winter design temperature.
Electrical service from Bear Valley Electric Service
If the load calculation shows you need a service upgrade, a second meter or a relocated service, Bear Valley Electric Service handles that through its Preliminary Service Request process, separately from the building permit.
ADU electrical service with Bear Valley Electric Service →
Plumbing and sewer
The plumbing plan shows the route, slope and cleanouts of the connection to the existing sewer lateral or septic system.
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 |
|---|---|---|---|
| San Bernardino | CZ 10, 16 | Southern California Edison (SCE) | 854 |
| Fontana | CZ 10 | Southern California Edison (SCE) | 754 |
| Ontario | CZ 10 | Southern California Edison (SCE) | 563 |
| Rancho Cucamonga | CZ 10 | Southern California Edison (SCE) | 316 |
| Upland | CZ 10 | Southern California Edison (SCE) | 285 |
| Chino | CZ 10 | Southern California Edison (SCE) | 269 |
San Bernardino County → · All California cities and communities →
Guides for Big Bear City projects
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in Big Bear City; requirements vary by project. Confirm with San Bernardino County Land Use Services – Building & Safety.