MEP Plans in Lompoc, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in Lompoc, prepared for plan check at the City of Lompoc building department, with Title 24 available in the same order.
Lompoc project facts we design around
| County | Santa Barbara County |
|---|---|
| Title 24 climate zone | Climate Zone 5, confirmed by ZIP for every project |
| Electric utility (most addresses) | City of Lompoc Electric Utility |
| Permit review | The City of Lompoc building department |
| ADU permits issued, 2021–2025 | 214 (#125 of 450 cities) |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in Lompoc
Lompoc issued 214 ADU building permits from 2021 through 2025, the 125th most among the 450 California cities that reported ADU permits. Permits went from 23 in 2023 to 124 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| not reported | not reported | 23 | 67 | 124 |
Source: California Department of Housing and Community Development, Annual Progress Report data (ADU building permits by year).
Title 24 in Climate Zone 5
- 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 0.585) / 1000 + 1.06; no PV is required if that is under 1.8 kWdc, which for a single ADU works out to about 1,265 sq ft or smaller.
Climate Zone 5 requirements in full →
HVAC design for Lompoc
The California Energy Commission's design-day data for Lompoc gives the outdoor conditions a Manual J load calculation uses: a summer design temperature of 76°F and a winter design temperature of 26°F.
| Summer design (1%) | 76°F dry bulb / 62°F wet bulb |
|---|---|
| Winter design (median of extremes) | 26°F |
| Daily temperature range | 18°F |
| Elevation | 95 ft |
| Heating degree days | 2,888 |
Both seasons matter here. The heat pump is usually sized for the 76°F cooling condition and then checked to confirm it still covers the heating load at 26°F.
Electrical service from City of Lompoc Electric Utility
If the load calculation shows you need a service upgrade, a second meter or a relocated service, open that request with City of Lompoc Electric Utility early; utility lead times are often longer than plan check.
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 |
|---|---|---|---|
| Santa Maria | CZ 5 | Pacific Gas and Electric (PG&E) | 2,199 |
| Santa Barbara | CZ 6 | Southern California Edison (SCE) | 683 |
| Goleta | CZ 6 | Southern California Edison (SCE) | 134 |
| Guadalupe | CZ 5 | Pacific Gas and Electric (PG&E) | 122 |
| Carpinteria | CZ 6 | Southern California Edison (SCE) | 43 |
| Santa Ynez (unincorp.) | CZ 5 | Pacific Gas and Electric (PG&E) | 37 |
Santa Barbara County → · All California cities and communities →
Guides for Lompoc projects
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in Lompoc; requirements vary by project. Confirm with the City of Lompoc building department.