MEP Plans in Oxnard, CA

Oxnard project facts we design around

County	Ventura County
Title 24 climate zone	Climate Zone 6, confirmed by ZIP for every project
Electric utility (most addresses)	Southern California Edison (SCE)
Permit review	The City of Oxnard building department
ADU permits issued, 2021–2025	1,265 (#13 of 450 cities)
ADU approval timeline	Approve or deny within 60 days of a complete application (state law)

ADU building activity in Oxnard

Oxnard issued 1,265 ADU building permits from 2021 through 2025, the 13th most among the 450 California cities that reported ADU permits. Permits went from 64 in 2021 to 497 in 2025.

2021	2022	2023	2024	2025
64	97	221	386	497

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 Oxnard

The California Energy Commission's design-day data for Oxnard gives the outdoor conditions a Manual J load calculation uses: a summer design temperature of 84°F and a winter design temperature of 30°F.

Summer design (1%)	84°F dry bulb / 68°F wet bulb
Winter design (median of extremes)	30°F
Daily temperature range	21°F
Elevation	49 ft
Heating degree days	2,068

Loads are small in this mild climate, so the common mistake is oversizing. A right-sized heat pump runs longer, quieter cycles and controls humidity better than a rule-of-thumb unit.

Electrical service from Southern California Edison (SCE)

If the load calculation shows you need a service upgrade, a second meter or a relocated service, Southern California Edison (SCE) handles that through its Building, Renovation, and Project Planning Portal, separately from the building permit.

ADU electrical service with Southern California Edison (SCE) →

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.