Monument Ranch, Perris, CA
Adding an ADU in Monument Ranch
Monument Ranch is a 2004-and-later tract community of roughly 2,100 residents in east Perris.
Newer construction means tighter lots, but Perris has the cleanest buildable geography of any city we serve — flat valley floor, sewered by Eastern Municipal Water District, low fire hazard — so site work tends to hold fewer surprises here than in the hillside communities.
- Free
- No account
- No phone number
- Your result first
Aerial: USGS/USDA NAIP
The basics
Monument Ranch at a glance
- Built
- 2004 onward
- Homeowners association
- Yes
- Lots
- Tract lots
- ZIP
- 92571
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 Monument Ranch lots the same size answer differently
Both of these are 7,200 sq ft with the same 40 × 46 ft house, under Perris's rules. The only difference is the shape, and it changes the answer.
60 ft wide, 120 ft deep
FitsStudio
- Buildable after setbacks
- 2,423 sq ft
- Plans that fit
- 1 of 5
90 ft wide, 80 ft deep
UnlikelyStudio
- Buildable after setbacks
- 2,049 sq ft
- Plans that fit
- 0 of 5
Two made-up lots, but not made-up numbers: the green area, the fit verdicts and the plan counts are computed with Perris's own 4 ft setback and 10 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 needs about 20 by 20 ft of clear space — and staying under 750 sq ft waives impact fees entirely.
Your HOA
The Monument Ranch association cannot say no
- It cannot prohibit an ADU. Gov. Code §66315 voids covenants that prohibit or unreasonably restrict one on a single-family lot.
- It can apply architectural standards. Expect an architectural committee submission.
- Submit to both at once. Association review and city plan check are independent. Running them in sequence adds a month for no reason.
Nearby
Other Perris neighborhoods
See what fits on your Monument Ranch lot
Free. You see the result before we ask for anything.