Mountain House · Zoning · R-M
Mountain House R-M zoning: height, setbacks and lot size
In Mountain House's R-M zone, generally buildings can be up to 2 stories, the front setback is 15 ft and the minimum lot size is 3,000 sq ft, with the conditions listed below (Mountain House code, read October 2026).
Key points
- Maximum number of stories: 2 stories
- Minimum front setback: 15 ft (Tracts with a standard lot size of 3,600 sq ft or more)
- Minimum side setback: 5 ft
- Minimum rear setback: 15 ft (Tracts with a standard lot size of 3,600 sq ft or more)
- Minimum lot size: 3,000 sq ft (Tracts with a standard lot size of 3,600 sq ft or more)
- Maximum lot coverage: 50% (Tracts with a standard lot size of 3,600 sq ft or more)
- Maximum floor area ratio (FAR): 75% (Small-lot tracts (standard lot size under 3,600 sq ft); an average FAR across the Model Home Master Plan)
R-M is a zoning district in Mountain House. Every value below was read from the Mountain House Municipal Code and links to its section (read October 2026). State laws such as the ADU and SB 9 rules can allow more on a residential lot. General information, not legal advice — read the code text and check with the city before you build.
Development standards in R-M
The general rule for a typical lot in this zone. Zoning tables often attach notes, such as rules for corner lots, lots next to a residential zone, or new subdivisions only. Open “code text” under a value to see the table cell or sentence it was read from.
| Maximum number of stories | 2 stories § 9-3-309 · code textTable row “R-M (≥3,600 sf)”, column “Maximum Building Height (stories)”: 2 |
|---|---|
| Minimum front setback | 15 ft Applies: Tracts with a standard lot size of 3,600 sq ft or more § 9-3-309 · code textTable row “R-M (≥3,600 sf)”, column “Front Setback (feet)”: 15 |
| Minimum side setback | 5 ft § 9-3-309 · code textTable row “R-M (≥3,600 sf)”, column “Side Setback (feet)”: 5 |
| Minimum rear setback | 15 ft Applies: Tracts with a standard lot size of 3,600 sq ft or more § 9-3-309 · code textTable row “R-M (≥3,600 sf)”, column “Rear Setback (feet)”: 15 |
| Minimum lot size | 3,000 sq ft Applies: Tracts with a standard lot size of 3,600 sq ft or more § 9-3-309 · code textTable row “R-M (≥3,600 sf)”, column “Minimum Lot Size (square feet)”: 3,000 |
| Maximum lot coverage | 50% Applies: Tracts with a standard lot size of 3,600 sq ft or more § 9-3-309 · code textTable row “R-M (≥3,600 sf)”, column “Maximum Building Coverage (Percent)/ Maximum Average FAR (Percent)”: 50 Coverage |
| Maximum floor area ratio (FAR) | 75% Applies: Small-lot tracts (standard lot size under 3,600 sq ft); an average FAR across the Model Home Master Plan § 9-3-309 · code textTable row “R-M (<3,600 sf)”, column “Maximum Building Coverage (Percent)/ Maximum Average FAR (Percent)”: 75 Average FAR |
Uses in R-M
Uses the code's use tables allow in R-M, or allow with a permit. Each links to its page with the code section.
- Duplex — Allowed
- Child care center — Needs an use permit
- Growing crops — Allowed
When a different number applies
The code sets other values for particular lots, buildings or locations in R-M:
- Minimum front setback: 10 ft — Small-lot tracts: standard lot size under 3,600 sq ft § 9-3-309
- Minimum side setback: 0 ft — Along a common wall in a zero lot-line project, or where buildings are at least the minimum separation apart; coverage and FAR limits still apply. § 9-3-305
- Minimum side setback: 10% of smallest lot width, min 3 ft — Lots less than 51 feet wide within a tract for which a Model Home Master Plan has been approved. § 9-3-305
- Minimum side setback: 5 ft plus 10% of smallest lot width, min 9 ft — Corner lots less than 51 feet wide within a tract for which a Model Home Master Plan has been approved; streetside side setback. § 9-3-305
- Minimum side setback: 10 ft — Corner lots at least 51 feet wide; streetside side setback. § 9-3-305
- Minimum rear setback: 10 ft — Corner lots within Tract 3202. § 9-3-305
- Minimum rear setback: 10 ft — Small-lot tracts: standard lot size under 3,600 sq ft § 9-3-309
- Minimum lot size: 2,000 sq ft — Small-lot tracts: standard lot size under 3,600 sq ft § 9-3-309
- Minimum lot size: 3,600 sq ft — Specific Plan III area § 9-3-309
Not on this page
We did not find a general height, density limit for R-M in the zoning tables we read. The code may still set one elsewhere — check the Mountain House Municipal Code.
Other Mountain House zoning districts
Who this affects
Frequently asked questions
What is the maximum number of stories in Mountain House's R-M zone?
2 stories — Mountain House Municipal Code § 9-3-309.
What is the minimum front setback in Mountain House's R-M zone?
15 ft (tracts with a standard lot size of 3,600 sq ft or more) — Mountain House Municipal Code § 9-3-309.
What is the minimum side setback in Mountain House's R-M zone?
5 ft — Mountain House Municipal Code § 9-3-309.
What is the minimum rear setback in Mountain House's R-M zone?
15 ft (tracts with a standard lot size of 3,600 sq ft or more) — Mountain House Municipal Code § 9-3-309.
What is the minimum lot size in Mountain House's R-M zone?
3,000 sq ft (tracts with a standard lot size of 3,600 sq ft or more) — Mountain House Municipal Code § 9-3-309.
General information, not legal advice.
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