Calimesa — Overlay Districts

Last reviewed: July 3, 2026

Overview

Overlay districts in Calimesa are special zoning layers that modify or add rules to underlying base zones to achieve targeted objectives — for example, creek-adjacent design, higher-density infill, or hillside conservation. The principal overlays explicitly established in the Calimesa Municipal Code are the Calimesa Creek Overlay (CCO), the Residential Infill Priority Area Overlay (RIPAOZ), and the Planned Residential Development (PRD) overlay; the downtown business district and its downtown zones also operate with overlay-like, controlling standards in the downtown core. See the city zoning map and chapter list for where each applies. § 18.05.080

(Links: the citywide context for these rules is set in the Calimesa zoning & planning overview and the chapter-by-chapter rules live under Calimesa Zoning. When planning a project, expect to reconcile overlay rules with the base zone development standards in Calimesa Development Standards, and to satisfy any required design review. For overlays that affect parking or frontage, consult Calimesa Parking. If you propose accessory dwelling units, consult the city's ADU rules at Calimesa ADUs.)

Calimesa Creek Overlay (CCO)

• Purpose: Establishes design and public-access guidelines for redevelopment along Calimesa Creek to promote pedestrian access, protect scenic downtown character, and integrate creek-front improvements with downtown circulation. § 18.40.030(A)
• Where it applies: Properties mapped within the overlay on the official zoning map (downtown core). § 18.39.030(A)
• Permitted uses: Uses allowed are those of the underlying zone (i.e., the CCO does not create a new use list; it modifies development standards). Uses shall be permitted in accordance with the underlying zone district. § 18.40.030(B)
• Key development standards (practical highlights):
  • Preserve a natural creek look; avoid concrete channelization or unnatural confinement. § 18.40.030(C)(1)
  • Buildings must address both street and creek frontages; buildings shall not “turn their back” on the creek. § 18.40.030(C)(3)
  • A continuous pedestrian sidewalk or trail, minimum 10 feet wide, may be required along both sides of the creek. § 18.40.030(C)(5)
  • Buildings should be set back from the creek enough to provide lighting and pedestrian access — the code uses performance language rather than a single numeric setback. § 18.40.030(C)(7)
  • The overlay expressly prohibits commercial cannabis activity within the CCO, subject to exceptions in CMC § 18.135.040. § 18.40.030(D)
• Practical guidance: Expect application-level design coordination (façades, signage, lighting) and likely a condition requiring a pedestrian trail or maintenance access; numeric creek setbacks are not specified in the CCO — plan for flexible, site-specific setback/design solutions and verify required trail alignment with Public Works. § 18.40.030(C)

Residential Infill Priority Area Overlay (RIPAOZ)

• Purpose: Encourage residential infill at densities higher than some underlying residential base zones and to implement sites identified in the city’s housing element. The overlay encourages higher-density residential infill. § 18.20.020(H)
• Where it applies: Parcels mapped as RIPAOZ on the official zoning map; the overlay is listed among zone districts. § 18.05.080
• Permitted uses and special rules:
  • When RIPAOZ parcels sit on mixed-use base zones, the overlay may allow 100% residential and requires residential to occupy at least 50% of floor area of a mixed-use project. § 18.20.020(H)(1)
  • For sites used to satisfy RHNA shortfalls, the overlay requires a minimum density of 20 units per acre and that sites accommodate a minimum of 16 units per site. § 18.20.020(H)(2)(d)(i–ii)
  • Projects that provide at least 20% affordable units on certain candidate sites in the housing element may be approved as “use by right” and not require discretionary permits; however, such projects remain subject to design review (and design review will not be a “project” under CEQA for these specific cases). § 18.20.020(H)(2)(a–c)
  • Where RIPAOZ standards are more restrictive than the base zone, the base zone standards prevail in some contexts; conversely where RIPAOZ requires higher minimum densities, RIPAOZ controls. § 18.20.020(H)(3)(a–b)
• Key development standards (decision-relevant):
  • Minimum density: 20 units/acre for overlay sites intended to meet RHNA shortfalls. § 18.20.020(H)(2)(d)(ii)
  • Minimum units per site: 16 units (site-level requirement for certain RHNA overlay sites). § 18.20.020(H)(2)(d)(i)
• Practical guidance: If your project is for‑profit or market-rate without the required affordable set-aside, you will likely go through regular discretionary review (design/site review). If you target the 20% affordability on qualifying sites, you may achieve a by‑right path — confirm site eligibility through the housing element sites inventory and coordinate early with Planning. § 18.20.020(H)

Planned Residential Development (PRD) overlay

• Purpose: Encourage clustering, density transfers, and preservation of open space in hillside or environmentally sensitive terrain; the PRD overlay is used to lessen impacts by concentrating development on appropriate portions of a site. § 18.55.080(A–B)
• Where it applies: Applied where a PRD is processed for a development site — often in hillside classification areas mapped under the code. § 18.55.040 – § 18.55.080
• Permitted uses: The PRD is a procedural overlay — it does not itself list new uses but establishes clustering/density transfer tools and potential density bonuses up to 10% above the General Plan land use district if public amenities or enhancements are provided. § 18.55.080(B)
• Key development standards and mechanisms:
  • Clustering and density transfer are allowed to concentrate development on suitable areas of the site. § 18.55.080(A)
  • Up to 10% density bonus may be granted when the PRD provides public resources, amenities, or design excellence. § 18.55.080(B)
  • Hillside open-space percentages are tied to slope categories (e.g., 16–20% slopes require 20% natural open space, 31–45% require 75%) — open-space calculations are performed by slope category. § 18.55.070(C) (slope-open space table)
• Practical guidance: On slopes or hillside parcels, expect required open-space set-asides, a PRD-concurrent application, and possible tradeoffs (reduced setbacks or clustered lots) in exchange for preserved open space. Plan for geotechnical and erosion-control submittals. § 18.55.090

Downtown business district (context and overlap)

• The downtown business district chapters (Chapter 18.39) organize Downtown Village Commercial (DVC), Downtown Neighborhood Commercial (DNC), and Downtown Visitor-Serving (DVS) zones and explicitly integrate the Calimesa Creek Overlay as a priority design element for the downtown core. The downtown chapter controls within its boundaries and may supersede duplicative zoning provisions. § 18.39.010–030

Overlay Decision‑Relevance Table

Checklist

• Confirm that the parcel is mapped within the overlay on the official zoning map (official zoning map on file with City Clerk). § 18.05.090–100
• Determine the underlying base zone and its allowed uses; overlays may require additional standards but do not always change permitted uses (CCO uses follow underlying zone). § 18.40.030(B)
• Prepare a development plan and submit for the applicable level of plan review (minor or major development plan review) per Chapter § 18.90.030–040; the planning director or planning commission will be the approving authority. § 18.90.030–040
• If proposing infill under RIPAOZ, document site eligibility against the Housing Element sites inventory and confirm whether the project qualifies for the use‑by‑right path (≥20% affordable on qualifying sites). § 18.20.020(H)
• For PRD or hillside projects, prepare slope/open‑space calculations and erosion control and geotechnical reports per the hillside chapter. § 18.55.070–090
• Coordinate design elements required by CCO (trail, creek bank treatment, building orientation, pedestrian amenities) and be prepared to show how the design complements downtown function. § 18.40.030(C)
• If your project has parking impacts, check the Calimesa Parking standards and show compliance in the site plan. § 18.45.010–030
• Confirm whether proposed ADUs are allowed with overlay rules and follow the city ADU rules and state law. See Calimesa ADUs and applicable code references. Not all overlay text explicitly addresses ADUs; verify with Planning. § 18.90.030(C)(11)

Risks & Ambiguities

Plain-English Summary

Calimesa’s overlays add place-specific rules on top of the base zoning: the Calimesa Creek Overlay focuses on creek preservation, pedestrian trails, and downtown-facing building design (§ 18.40.030) ; the RIPAOZ pushes certain parcels toward denser residential development and can allow by‑right approval for qualifying affordable projects (§ 18.20.020(H)) ; and the PRD overlay is a tool for clustering housing and preserving open space on hillside parcels, with density‑bonus options (§ 18.55.080) . Verify the overlay mapping, reconcile overlay rules with the base zone, and expect design/development plan review. § 18.05.080

Source References

• Calimesa Municipal Code, § 18.40.030 Calimesa Creek overlay (CCO) — https://ecode360.com/CA4374
• Calimesa Municipal Code, § 18.20.020 Residential zone districts (including RIPAOZ) — https://ecode360.com/CA4374
• Calimesa Municipal Code, § 18.20.020(H) RIPAOZ special provisions — https://ecode360.com/CA4374
• Calimesa Municipal Code, § 18.55.070–090 (Hillside standards; PRD clustering & density transfer) — https://ecode360.com/CA4374
• Calimesa Municipal Code, Chapter 18.39 Downtown Business District (DVC/DNC/DVS and downtown standards) — https://ecode360.com/CA4374
• Calimesa Municipal Code, Chapter 18.90 Development Plan Review (minor/major) — https://ecode360.com/CA4374
• Official zone list and mapping authority, § 18.05.080–100 Zone districts & official zoning map — https://ecode360.com/CA4374

(Downloaded from eCode360 — City of Calimesa Zoning, Land Use and Development Code.)

Retrieved passages

• CMC § 18.55.050 (section does) High relevance show source text
• Calimesa Zoning Code (§ 18.55.020) High relevance show source text
• CMC § 18.135.040 (§ 12.7.02) High relevance show source text
• CMC § 18.55.050 (§ 18.55.070) High relevance show source text
• CMC § 18.135.040 (§ 18.15.130) High relevance show source text
• CMC § 18.20.020 (Title 16) Medium relevance show source text
• Calimesa Zoning Code (Section 65583.2) Medium relevance show source text
• Calimesa Zoning Code (title is) Medium relevance show source text

Cited sections

• Calimesa Municipal Code, **§ 18.40.030 Calimesa Creek overlay (CCO)** — (§ 18.40.030)
• Calimesa_ZoningCode.md