Quail Valley, Menifee, CA
Adding an ADU in Quail Valley
Quail Valley has the large lots an ADU wants and the single most complicated wastewater situation in the region, which is why most builders give you a vague answer here.
The Santa Ana Regional Water Quality Control Board prohibited new septic discharge in 2006. Resolution R8-2020-0004, approved in September 2020, created exemptions in subareas 1, 2, 3, 5, 6, 7 and 8 where no sewer service is available — but subareas 4 and 9 remain under the prohibition pending the Eastern Municipal Water District septic-to-sewer project. Your ADU’s feasibility here depends on which subarea your parcel sits in.
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- No account
- No phone number
- Your result first
Aerial: USGS/USDA NAIP
Before you spend
What to know before you spend anything
The basics
Quail Valley at a glance
- Built
- Older semi-rural
- Homeowners association
- Minimal
- Lots
- Large semi-rural lots
- ZIP
- 92587
We publish only what we verified. Lot dimensions vary enough inside a single tract that a neighborhood average would mislead you, so the tool reads your own parcel instead.
Why two Quail Valley lots the same size answer differently
Both of these are 7,200 sq ft with the same 40 × 46 ft house, under Menifee's rules. The only difference is the shape, and it changes the answer.
60 ft wide, 120 ft deep
Fits1 Bedroom 1B
- Buildable after setbacks
- 2,858 sq ft
- Plans that fit
- 5 of 12
90 ft wide, 80 ft deep
Unlikely1 Bedroom 1B
- Buildable after setbacks
- 2,938 sq ft
- Plans that fit
- 0 of 12
Two made-up lots, but not made-up numbers: the green area, the fit verdicts and the plan counts are computed with Menifee's own 4 ft setback and 6 ft separation by the same functions the lot tool runs on a real parcel. Your lot is not either of these, which is the point — we read yours.
Honest limits
What the geometry check can and cannot tell you
Why three answers, not yes or no
- Public parcel lines sit 3 to 25 ft from the surveyed boundary.
- The setback being measured is only 4 ft.
- When the error bar is wider than the measurement, "yes" is a guess. So: Fits Tight Unlikely
What public data cannot see
- Easements through the rear yard
- Slope
- Sewer or septic capacity
- Electrical panel capacity
- Soil conditions
Any one of these can stop a project that passes the geometry check.
On a tight lot, studio b needs about 15 by 20 ft of clear space — and staying under 750 sq ft waives impact fees entirely.
Nearby
Other Menifee neighborhoods
See what fits on your Quail Valley lot
Free. You see the result before we ask for anything.