Monte Sereno — Overlay Districts

Last reviewed: July 2, 2026

Overview

Monte Sereno's zoning code (Title 10 of the Municipal Code) uses a handful of special zones and combining districts that operate like overlays: conservation/scenic control zones, floodplain/special‑hazard areas, planned development combining districts (PD), and the public/public‑residential overlay standards (P / P‑RM). These overlay rules layer on top of the base R‑1‑8, R‑1‑20, R‑1‑44, RM, and other base districts and impose additional purpose, use and dimensional rules. See the city's official zoning map to know whether an individual parcel is inside an overlay (§ 10.04.020) .

Below I summarize which overlays appear in the Monte Sereno zoning ordinance, what each controls, the most decision‑relevant numeric limits, and the exact code sections to check for applications.

Conservation Zone (Conservation / Scenic control)

• Purpose: Protect natural features (trees, creeks, rock outcroppings), limit disturbance on steep or environmentally sensitive parcels, and preserve rural/visual character. See § 10.05.060 for scope and required protections.
• Typical permitted uses: Residential uses remain allowed (subject to base district rules); commercial uses are generally not permitted in the Conservation Zone (§ 10.05.060).
• Key standards and practical effects:
  • Minimum building site size and slope limits for dwellings are imposed (minimum building site 5,400 sq ft and average slope less than 40% in the Conservation Zone) — see § 10.05.060.
  • Structures near creeks must respect setbacks (“set back at least 32 ft from the 100‑year flood influence line”) and avoid culverting waterways except for crossings (§ 10.05.060).
• Where it applies: Locations designated as Conservation Zone on the official zoning/General Plan layers; confirm on the official zoning map kept by the City Clerk (§ 10.04.020) .

Scenic Corridor / Scenic Highway Control Zones (Saratoga‑Los Gatos Rd & Quito Rd)

• Purpose: Preserve and manage visual character along major corridors by adding architectural/design review and tree/vegetation protection rules (§ 10.05.070) .
• Typical requirements:
  • Architectural review of any fence, wall within 50 ft, or structure within 300 ft of Saratoga‑Los Gatos Road or Quito Road that is visible from the corridor (§ 10.05.070).
  • Tree removal within 50 ft of the corridor is restricted unless replanting is approved (§ 10.05.070).
• Where it applies: Parcels within the corridor mapping (General Plan / zoning map). Verify parcel location with the zoning map (§ 10.04.020) .

Floodplain / Areas of Special Flood Hazard (Overlay)

• Purpose: Regulate development in FEMA‑mapped flood hazard areas to reduce flood loss and ensure safe development (§ 10.21.010 and § 10.21.060).
• How it functions:
  • Development permits required for work in flood hazard areas and specific construction/elevation standards apply (§ 10.21.150, § 10.21.170) — applicants must supply elevation certifications, engineering, and other documentation.
  • The Floodplain Administrator (City Planner) administers and enforces the overlay; variances are tightly limited and require findings relating to public safety and flood heights (§ 10.21.130, § 10.21.240–250)
• Where it applies: The FEMA‑based maps and any city supplemental studies adopted by reference; see § 10.21.070 and the maps on file with the City Clerk.

Planned Development Combining District — PD (combining/overlay style)

• Purpose and effect: The PD is a combining/planned development classification that must be paired with a base district (e.g., RM(PD)) and is effectuated only by adoption of a PD permit and general development plan (§ 10.05.010 and § 10.05.047). Until a PD permit is implemented, the property follows the base district rules. When implemented, the PD permit controls uses, heights, parking counts and exact dimensions — the PD permit prevails over the base code (§ 10.05.047) .
• Typical permitted uses: Whatever the approved PD permit lists; PDs are individually tailored (the code expressly allows a PD to specify particular uses and dimensions) (§ 10.05.047).
• Key project / application impacts:
  • PD requires a general development plan with drawings, parking, landscaping, environmental mitigation, setbacks, and design controls (see PD plan content requirements in § 10.05.047 and PD amendment/approval procedures in § 10.11.015)
  • The City Council may attach conditions and may revoke or refuse PDs — discretion is broad (§ 10.05.047).

Public ("P") and Public/Residential ("P/RM") — labeled in the code as overlay‑style districts

• The code lists P and P/RM districts and then states that certain development standards shall apply in the P and P/RM Overlay Districts (setbacks, lot size, coverage, parking) — see § 10.05.045 (D) and related subparts for numeric standards. These function like overlays that modify the base rules where these districts apply.
• Representative numeric controls (decision‑relevant highlights from the P / P‑RM development standards):
  • Minimum net lot size per unit: 8,000 sq ft (§ 10.05.045 D.1)
  • Front setbacks: 25 ft (single‑story) / 30 ft (second‑story) (§ 10.05.045 D.2)
  • Side setbacks: 6 ft (single‑story) / 10 ft (second‑story); corner side special values also defined (§ 10.05.045 D.3)
  • Rear setback: 30 ft (§ 10.05.045 D.4)
  • Maximum structural coverage (P/RM): 40%; maximum impervious coverage: 60% (§ 10.05.046/§ 10.05.045 numeric tables)
  • Maximum unit sizes (P/RM): 3,300 sq ft (single‑story) / 3,000 sq ft (two‑story) (§ 10.05.046 / 10.05.045 subparts)
• Where it applies: Only to parcels zoned P or P/RM on the official zoning map; check § 10.04.020 for map custody and § 10.05.010 for district definitions.

Quick Reference Table — decision‑relevant standards / permitted uses

Practical guidance (plain‑English synthesis)

• Start at the map: verify whether your parcel sits inside an overlay by checking the official zoning map (City Clerk) and confirming base district + any overlay labels (§ 10.04.020) .
• If parcel is in a Conservation or Scenic corridor zone, expect additional design review and tree/creek protections; setbacks are often larger and culverting is discouraged (§ 10.05.060, § 10.05.070) .
• If in a FEMA flood area, early coordination with the City Planner (Floodplain Administrator) is required; you will need elevation/floodproofing documentation and a separate development permit (§ 10.21.130, § 10.21.150) .
• For parcels in a PD, read the PD permit/general development plan carefully — the PD permit controls parking counts, exact heights and uses when it has been effectuated (§ 10.05.047) .
• Design review is commonly required for structures in these overlays; consult the Site & Architectural / design review procedures early (§ 10.05.046, Chapter 8 / Site Development Permit rules) .
• If your project involves parking changes, be ready to meet the local parking standards and any PD‑specified parking counts (PD permits often specify exact parking) — parking rules are enforced both in base and PD contexts (§ 10.05.047).

(For related planning topics: see the Monte Sereno pages on development standards, parking, design review, ADUs, and historic preservation. Also, building rules must also meet the California Building Standards Code.)

Checklist

• Determine base zone and overlay(s) for the parcel from the official zoning map (§ 10.04.020) .
• For Conservation or Scenic Corridor locations, identify protected trees, creek setbacks, and whether culverting is proposed (§ 10.05.060, § 10.05.070) .
• For flood‑area parcels, get FEMA/City flood maps and obtain required elevation/floodproofing documentation; confirm need for a development permit (§ 10.21.070, § 10.21.150) .
• If property is PD or PD‑eligible, obtain/confirm the PD permit or general development plan and follow the PD’s exact parking, height and use rules (§ 10.05.047) .
• Prepare materials for design review / site development permit as required (story poles, plans, landscaping, neighborhood context) (§ 10.05.046, Chapter 8) .
• Check parking, coverage and setback numeric limits that apply to the overlay (e.g., P / P‑RM standards in § 10.05.045 D) .
• Verify whether any portion of the overlay imposes more restrictive conditions than deed covenants or CC&Rs — the most restrictive rule applies (§ 10.21.090) .

Risks & Ambiguities

Plain‑English Summary

If your Monte Sereno property falls inside a named overlay (Conservation, Scenic Corridor, Floodplain), expect extra rules on where and how you can place buildings, extra design review, and in some cases special setbacks and coverage limits; if a property is in a PD, the PD permit itself — not the generic code — will control once it’s implemented. Confirm overlay status on the official zoning map and talk to the City Planner early. (§ 10.04.020, § 10.05.060, § 10.05.070, § 10.21.060, § 10.05.047)

Source References

• Monte Sereno Municipal Code — Title 10 (Zoning): Official zoning map and district definitions, § 10.04.020, § 10.04.030.
• Conservation Zone regulations — § 10.05.060 (Conservation / Scenic control rules).
• Scenic Corridor controls — § 10.05.070 (Saratoga‑Los Gatos Scenic Highway Corridor & Quito Road Scenic Corridor).
• P / P‑RM development standards (P and P/RM Overlay Districts) — § 10.05.045 D and related subparts for setbacks, coverage, parking, unit sizes.
• Planned Development (PD) combining district rules — § 10.05.010, § 10.05.047 (PD plan & PD permit effectuation).
• Floodplain / Areas of Special Flood Hazard — § 10.21.010, § 10.21.060, § 10.21.070, § 10.21.150, § 10.21.170 (map basis, development permit, elevation/certification standards).
• Site development / design review triggers — § 10.08.040 and § 10.05.046 (design review).

Retrieved passages

• Monte Sereno Zoning Code (Title of) Medium relevance show source text
• Monte Sereno Zoning Code (Section 65801) Medium relevance show source text
• Monte Sereno Zoning Code (Section 10.21.160.) Medium relevance show source text
• Monte Sereno Zoning Code (§ 1) Medium relevance show source text
• Monte Sereno Zoning Code (§1) Medium relevance show source text
• Monte Sereno Zoning Code (§ 4) Medium relevance show source text
• Monte Sereno Zoning Code (§ 1) Medium relevance show source text
• Monte Sereno Zoning Code (§ 1) Medium relevance show source text
• Monte Sereno Zoning Code (Section 10.05.047.) Medium relevance show source text
• Monte Sereno Zoning Code (§ 3) Medium relevance show source text
• Monte Sereno Zoning Code (Chapter pertaining) Medium relevance show source text
• Monte Sereno Zoning Code (Chapter 5) Medium relevance show source text
• Monte Sereno Zoning Code (Chapter 8) Medium relevance show source text
• Monte Sereno Zoning Code (§ 1) Medium relevance show source text
• Monte Sereno Zoning Code (§ 1) Medium relevance show source text
• Monte Sereno Zoning Code (§ 1) Medium relevance show source text
• Monte Sereno Zoning Code (section 65660) Medium relevance show source text
• Monte Sereno Zoning Code (Title of) Medium relevance show source text

Cited sections

• Monte Sereno Municipal Code — Title 10 (Zoning): Official zoning map and district definitions, **§ 10.04.020**, **§ 10.04.030**. (Title 10)
• **Conservation Zone** regulations — **§ 10.05.060** (Conservation / Scenic control rules). (§ 10.05.060)
• **Scenic Corridor** controls — **§ 10.05.070** (Saratoga‑Los Gatos Scenic Highway Corridor & Quito Road Scenic Corridor). (§ 10.05.070)
• **P / P‑RM** development standards (P and P/RM Overlay Districts) — **§ 10.05.045 D** and related subparts for setbacks, coverage, parking, unit sizes. (§ 10.05.045)
• **Planned Development (PD)** combining district rules — **§ 10.05.010**, **§ 10.05.047** (PD plan & PD permit effectuation). (§ 10.05.010)
• **Floodplain / Areas of Special Flood Hazard** — **§ 10.21.010**, **§ 10.21.060**, **§ 10.21.070**, **§ 10.21.150**, **§ 10.21.170** (map basis, development permit, elevation/certification standards). (§ 10.21.010)
• Site development / design review triggers — **§ 10.08.040** and **§ 10.05.046** (design review). (§ 10.08.040)
• MonteSereno_ZoningCode.md

• Official Monte Sereno code library