Local jurisdiction · Santa Clara County
Monte Sereno Zoning, Planning & Building Codes
What you can build in Monte Sereno depends on its local zoning and planning code, layered on the California Building Standards Code. Ask GoCodebook about any Monte Sereno address.
Key points
Last reviewed: July 3, 2026
Overview
Monte Sereno’s zoning and planning rules are codified in the city’s municipal zoning Title and implemented through a set of chapters that establish district types, overlay rules, development standards, and permit procedures. The code formally adopts the zoning plan and delegates plan interpretation and administration to the City Council and City Planner (see § 10.02.010 and § 10.01.030) . Major review tools include site development permits and planned development permits administered under Chapter 10.08 (site & architectural review) and district-specific development standards in Chapter 10.05 (zoning districts) (see § 10.08.010 and § 10.05.010) . This page orients you to where the rules live, how they are applied, and how California housing laws intersect with Monte Sereno rules.
(For a quick navigation to topic pages, see the City’s topical menu: Monte Sereno Zoning, Monte Sereno Development Standards, Monte Sereno Design Review, Monte Sereno Parking, Monte Sereno Overlay Districts, Monte Sereno ADUs, and the California Building Standards Code.)
How Monte Sereno's code is organized
- The city organizes zoning and land-use rules within a municipal Title that contains numbered chapters and sections; the zoning map is an adopted part of the Title and kept on file with the City Clerk (see § 10.04.010 and § 10.04.020) .
- Chapter headings you will use most often include: the zoning district chapter (Chapter 10.05, e.g., § 10.05.010 establishes district names), the site development / planned development chapter (Chapter 10.08; see § 10.08.010 and § 10.08.040), and technical chapters such as the floodplain regulations (Chapter 10.21; see § 10.21.150) .
- Interpretations and ambiguous map boundaries are resolved by the City Council or by rules in the Title (see § 10.01.030 and § 10.04.030) .
Zoning district families
Monte Sereno’s base districts and immediate overlays are described in the zoning-district chapter and include the following primary district families (bold = the code name you will see on the map):
- R 1-44 — large-lot single-family residential (≈43,560 sq ft min.) § 10.05.010
- R 1-20 — single-family residential (≈20,000 sq ft min.) § 10.05.010; the R-1-20 district explicitly lists Accessory dwelling unit and Junior accessory dwelling unit as allowed uses (see § 10.05.030)
- R 1-8 — smaller single-family residential (≈8,000 sq ft min.) § 10.05.010
- RM — residential multi-family district (≈14,520 sq ft min.), permits duplexes/triplexes and accessory units where allowed § 10.05.010 and § 10.05.043
- P — public district (for public facilities) and P/RM — Public/Residential Multi-Family Overlay (special rules apply when combined) § 10.05.010 and § 10.05.045
- PD — Planned Development District (applied as a PD overlay on a base district; PDs are adopted by ordinance and governed by a general development plan and a PD permit) § 10.05.010 and § 10.05.047
Cluster housing exceptions are allowed in R 1-8, RM and P/RM under the cluster rules (see § 10.05.050) .
(First mention links: Monte Sereno Zoning)
Citywide development standards
Monte Sereno places most dimensional and site-control rules in the zoning district chapters and the cluster/overlay sections; many districts have district-specific front/side/rear setbacks, maximum structural and impervious coverage, heights, and parking requirements.
- Where to find the standards: district-specific setbacks, lot area, and permitted uses are in the district sections (for example § 10.05.030 for R-1-20, § 10.05.040 for R-1-8, § 10.05.043 for RM, and § 10.05.045 for P/P‑RM). These sections list the precise front/side/rear setbacks and minimum lot sizes applicable to that district (see §§ 10.05.030, 10.05.040, 10.05.043, 10.05.045) .
(For a district-by-district summary, see Monte Sereno Development Standards.)
Key, commonly-encountered numeric rules (district-level — confirm for your lot/district):
- Minimum lot sizes and setbacks: e.g., R-1-20 front setback 30 ft for single‑story and 40 ft for second‑story portions (§ 10.05.030) .
- In P/P‑RM overlay, typical front setbacks are 25 ft (single‑story) and 30 ft (second story) and side setbacks are 6 ft (single‑story) and 10 ft (second‑story) (§ 10.05.045) .
- Cluster developments include special standards such as 3,000 sq ft maximum ground coverage per building, 12 ft minimum building separation, 25 ft minimum setback to exterior boundaries, and a 30 ft maximum height (with slope-based adjustments) (§ 10.05.050) .
- District maximum structural and impervious coverage percentages are set by district; for certain districts the code lists 30% structural coverage and 40% impervious coverage as baseline examples — always check the district subsection for the authoritative numbers (see § 10.05.040 and related district subsections) .
- Parking: district and overlay sections prescribe required off-street parking (examples: R-1-8 parking formulas and P/RM off-street requirements); P/RM off-street parking may require one covered + one uncovered space per unit in certain P/RM rules (see § 10.05.043 and § 10.05.045) .
(See Monte Sereno Parking for topic-level navigation.)
Design and discretionary review
- All new and modified structures are subject to design review under the code; the code requires design review approval in accordance with the Title’s design-review chapter (see § 10.05.046) .
- The Site & Architectural Commission and City Planner are charged with aesthetic/site review; the site development permit process explains what projects trigger commission review versus ministerial review (see §§ 10.08.010, 10.08.040, 10.08.050) .
(See Monte Sereno Design Review for procedural details.)
Overlays, special zones and environmental designations
- The code includes overlay treatments and special zones such as the P/RM overlay, Conservation Zone, and scenic corridor control zones (see § 10.05.045 and § 10.05.060) . The Conservation Zone adds requirements (e.g., minimum building site size, slope limits, a 32 ft setback from the 100‑year flood influence line) § 10.05.060 .
(See Monte Sereno Overlay Districts for a quick index.)
Specific plans & overlays
- Monte Sereno uses PD (Planned Development) zoning to create site-specific rules; a PD is effectuated only by issuance of a PD permit and may override base-district rules where the PD permit is in effect (see § 10.05.047 and the PD provisions) .
- The P/RM overlay and P district contain their own development standards (setbacks, lot sizes, accessory unit allowances) in the P/P‑RM district text (see § 10.05.045) .
- The code also includes corridor controls (Saratoga–Los Gatos Scenic Highway Corridor and Quito Road Scenic Corridor) that trigger architectural review for visible improvements (see § 10.05.070) .
Building permits & review
Permits you will encounter
- Zoning clearance / planning permits: many projects require a zoning clearance or planning permit before a building permit is issued; antenna/wireless and other specialty facilities have their own permitting rules (see § 10.09.050) .
- Site development permit: major residential work (new main house; certain additions; any addition over stated square-foot triggers; second‑story additions; roof height modifications) requires a site development permit issued before building permits (see § 10.08.040) .
- Permit process and hearings: site development and planned development permit procedures (applications, story poles for certain projects, noticing, commission/council hearings, and conditions) are set out in the site-development chapter (see § 10.08.050 and related subsections) .
- Floodplain / special technical permits: in flood hazard areas you must obtain a development permit with specific submittals and engineering certifications (see § 10.21.150 and § 10.21.170) .
How review is typically sequenced (practical orientation)
- Check the official zoning map and district rules (see § 10.04.020 and § 10.05.010) .
- Confirm whether the work triggers a site development permit or PD permit (see § 10.08.040) and whether ministerial review is possible for smaller projects (see § 10.08.040 and § 10.08.050) .
- Prepare the submittal packet — the code lists required drawings and calculations for planned development and site-development submittals (elevations, lot area, structural/impervious coverage, grading, story pole requirements) (see § 10.08.050 and the planned development submission list in § 10.05.047) .
- Expect design review (all structures are subject to design review under § 10.05.046) and public hearing notice for PD and many site development items (see § 10.05.046 and § 10.08.050) .
(When you are ready to file, you will also work with building permits and Title 24 (California Building Standards Code) plan checks — see California Building Standards Code.)
State housing law in Monte Sereno
How state law shows up in the local code
- Two‑unit/missing‑middle rules: Monte Sereno’s code includes a local section expressly addressing residential developments under Government Code § 65852.21 and says incompatibility with the city's density limits is not a basis to deny a qualifying two-unit development — see § 10.05.080 (the code implements state two‑unit provisions) .
- Accessory dwelling units (ADUs) and junior ADUs: ADUs and JADUs are listed as allowed uses in several residential districts (for example R-1-20, RM, and P/P‑RM) — see § 10.05.030, § 10.05.043 and § 10.05.045 . Monte Sereno’s posted code does not reproduce every nuance of the current state ADU rules, so applicants must reconcile local district allowances with state ADU law; see the state ADU guidance for ministerial standards and local limitations that cannot be imposed (see the California ADU law guidance) .
- Density bonus / supportive housing / emergency shelters: the code explicitly allows residential care, supportive housing and emergency-shelter uses in P and RM/P‑RM subject to the listed standards (see § 10.05.045 and § 10.05.043) . For state density bonus entitlements, the city’s PD and use-permit processes will interact with state law (verify with the Planning Department).
- Rent control / tenant protections: there is no municipal rent‑control ordinance text in the zoning chapters we reviewed; no local rent-control provisions were located in the retrieved zoning chapters (Not found in retrieved materials — verify with City staff or municipal code outside Title 10).
(First mention links for housing/state context: Monte Sereno ADUs and California housing laws and California ADU law)
Information gaps / what to verify with the City
- The code text in the supplied materials covers Chapters 10.02–10.21 and specific district provisions, but I was not able to find a single consolidated “ADU ordinance” local supplement that reconciles every recent state ADU change — rely on state law for ministerial ADU standards and confirm local implementation with the Monte Sereno planning counter (see § 10.05.030 for district permissions and state ADU guidance) .
- If you need precise acreage- or parcel-specific setbacks, or the effective PD permit rules for a property already in a PD, confirm the recorded PD permit and adopted general development plan because PD provisions supersede base-district rules once effectuated (see § 10.05.047 and § 10.05.047.B) .
- For rent-law questions and any ordinances outside Title 10 (e.g., municipal ordinances in other Titles), no applicable rent-control text was located in the retrieved Title 10 zoning material (Not found in retrieved materials).
Source References
- Monte Sereno zoning code (districts, map, Title/Chapters): § 10.05.010, § 10.04.020, § 10.01.030
- Site development / planned development permits and procedures: § 10.08.010, § 10.08.040, § 10.08.050, § 10.05.047
- District development standards, setbacks, coverage, parking (R-1-20, R-1-8, RM, P/P‑RM, cluster): § 10.05.030, § 10.05.040, § 10.05.043, § 10.05.045, § 10.05.050
- Design review requirement: § 10.05.046
- Conservation and scenic corridor rules: § 10.05.060 and § 10.05.070
- Floodplain development and permits: § 10.21.150 and § 10.21.170
- State ADU guidance (background on how state law may limit local controls): 2025 California ADU handbook (summary of recent ADU law changes)
Where to read the Monte Sereno code
The Monte Sereno municipal and zoning code is published on Municode — view the official Monte Sereno code library. That lets you read the ordinance section by section.
GoCodebook goes beyond browsing Municode (see how they compare): it reads the Monte Sereno ordinance together with the California Building Standards Code and answers your question — zoning, setbacks, FAR, height, ADUs, permits — with the controlling citation for your parcel.
Who this affects
Frequently asked questions
What zoning districts does Monte Sereno have?
Monte Sereno’s zoning map uses district names including R 1-44, R 1-20, R 1-8, RM, P, P/RM, and PD (Planned Development); those base districts and overlays are listed in the code at § 10.05.010 .
Do I need a permit to build a new house or add a second story?
Yes. A new main house and many substantial additions or any second‑story additions trigger a site development permit that must be issued prior to a building permit (see the site-development triggers at § 10.08.040 and the permit procedures in § 10.08.050) .
Are accessory dwelling units (ADUs) allowed in Monte Sereno?
ADUs and junior ADUs are listed as allowed uses in several residential districts (for example R‑1‑20, RM, and P/P‑RM)—see § 10.05.030, § 10.05.043, and § 10.05.045. Because state ADU law also constrains what local rules can require (ministerial approvals, maximums, parking limits, and setbacks), applicants must reconcile local district allowances with state ADU rules (see § 10.05.030 and state ADU guidance) .
Does Monte Sereno have special overlay rules I should know about?
Yes. The code contains overlays such as the P/RM overlay with its own minimum net lot sizes, setbacks and coverage rules, and a Conservation Zone and scenic corridor controls that add protections and extra architectural review requirements (see § 10.05.045 and § 10.05.060) .
Is design review required for all building projects?
All structures are subject to design review approval as required by the zoning Title’s design-review provisions (see § 10.05.046) . Some smaller residential projects may be handled ministerially by the City Planner, but many new homes, additions, and PD projects go through the commission hearing process (see § 10.08.040 and § 10.08.050) .
What are typical setback and height limits I should expect?
Setbacks and heights are district-specific. Examples in the code include the R-1-20 front setback of 30 ft (single‑story) and 40 ft (second story) (§ 10.05.030), P/P‑RM front setbacks of 25 ft (single‑story) and 30 ft (second story) (§ 10.05.045), and cluster development maximum height 30 ft (with slope adjustments) (§ 10.05.050) — always check the section that corresponds to your parcel’s district for exact numbers .
How is parking regulated for new homes or multi‑unit projects?
Parking requirements are spelled out in each district/overlay. Examples include P/RM off-street provisions and R‑1‑8 parking formulas; some provisions specify covered vs. uncovered spaces and distances to dwelling access (see § 10.05.043 and related district subsections) .
Can the City deny an ADU because my lot is “too small” under local density limits?
The code lists ADUs as an allowed use in multiple residential districts (see § 10.05.030, § 10.05.043, § 10.05.045), but state ADU law limits local ability to impose certain size, coverage and setback barriers. Because Monte Sereno’s local text does not appear to override state ADU rules in all respects in the retrieved materials, you should reconcile local district rules with state ADU law and verify with the Planning Department (see state ADU guidance) .
Does Monte Sereno have rent control?
No rent‑control provisions were found in the zoning chapters retrieved for Title 10 (Not found in retrieved materials). Confirm with the City Clerk or municipal code in other Titles for any tenant‑protection or rent‑stabilization ordinances outside the zoning Title (Not found in retrieved materials).
What if my property is in a floodplain or conservation zone?
If your property lies within a mapped special flood hazard, you must obtain a development permit with detailed submittals and engineering certifications; conservation zones add minimum building site and setback requirements (see § 10.21.150, § 10.21.170, and § 10.05.060) .
More in Monte Sereno code
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