Local zoning · Grand Terrace

Grand Terrace — Development Standards

Development Standards under the Grand Terrace local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page summarizes the development standards that appear in the Grand Terrace Zoning (Title 18) municipal code: setbacks, heights, lot coverage, density/FAR rules where specified, and the local review pathways that enforce those standards. It is a plain‑English, Grand Terrace–specific digest with district-by-district highlights, practical guidance, and direct citations to the controlling ordinance sections. For related procedural topics see the city's pages for Grand Terrace Zoning, Grand Terrace Parking, Grand Terrace Design Review, Grand Terrace Overlay Districts, Grand Terrace ADUs, Grand Terrace Landscaping and Screening, and the California Building Standards Code.

District-by-district development standards

Notes on citations: every numeric requirement below is tied to the Grand Terrace Zoning Code by its controlling code section (§ number). The file preview containing each quoted § is cited after the § reference.

AP — Administrative Professional

  • Purpose / typical uses: Intended for professional office uses located close to residential areas (purpose statement). See § 18.30.010.
  • Key dimensional standards (site development): Minimum lot area 10,000 sq ft, minimum lot width 70 ft, front yard setback 15 ft, height maximum 35 ft, lot coverage 100% (subject to parking/setbacks/landscaping) as listed in § 18.30.040. Bold: 15 ft front, 35 ft height, 100% lot coverage. (§ 18.30.040)
  • Where it applies: See the AP district chapter; site and architectural review provisions from Chapter 18.63 apply in AP (§ 18.30.080). (§ 18.30.040; § 18.30.080)

C2 — General Business

  • Purpose / typical uses: General commercial and freeway‑oriented retail/service uses; permitted uses are listed in Table 18.27.010. (§ 18.33.010 / § 18.27.010)
  • Key dimensional standards: Minimum lot area 10,000 sq ft, lot width 70 ft, front yard setback 25 ft, rear yard 0 ft (10 ft if adjacent to R district), height maximum 35 ft, lot coverage up to 100% (less required parking/setbacks/landscaping) per § 18.33.040. Bold items: 25 ft front, 35 ft height, 100% lot coverage. (§ 18.33.040)
  • Where it applies: C2 district geographic map in zoning; off‑street parking rules come from Chapter 18.60 (§ 18.33.060). (§ 18.33.040; § 18.33.060)

M2 — Industrial (M2)

  • Purpose / typical uses: Heavier industrial/manufacturing uses with tailored screening and setbacks. (See Chapter 18.40). (§ 18.40.020–.050)
  • Key dimensional standards: Minimum lot area 20,000 sq ft, lot width 70 ft, front yard 25 ft (with 10 ft landscape setback), street side yard 15 ft (with 5 ft landscape setback), height max 35 ft, lot coverage up to 100% (less required parking/setbacks/landscaping) per § 18.40.050. Bold items: 20,000 sq ft, 25 ft front, 35 ft height. (§ 18.40.050)
  • Important controls: outdoor storage must be set back and screened (§ 18.40.060). (§ 18.40.060)

AG‑2 Overlay (Agricultural Overlay)

  • Purpose / typical uses: Large‑lot, agricultural/animal keeping standards where applied (Chapter 18.56). (§ 18.56.060)
  • Key dimensional standards: Minimum lot area 1 acre, front yard 40 ft, rear yard 35 ft, side yards 20 ft, height max 35 ft, building lot coverage 40%. Bold items: 1 acre, 40 ft front, 40% lot coverage. (§ 18.56.060)
  • Accessory buildings: additional specific setbacks and maximum % of rear yard are specified in § 18.56.070. (§ 18.56.070)

Planned Residential Development (process for R2/R3) — PRD (R2 & R3 focus)

  • Purpose: Allows flexibility/clustered design to get higher quality infill and amenities; processed per the planned residential development rules. (§ 18.10.090)
  • Applicability / where allowed: Permitted in R2 and R3 zones and specific parcels listed in § 18.10.090.B. (§ 18.10.090)
  • Key dimensional/density rules in PRD: Density must comply with the underlying zone; lot coverage shall not exceed 60% in a planned residential development; perimeter setbacks: front 20 ft / rear 15 ft / side 10 ft / street side 10 ft; project-level spacing and small-lot subdivision rules are specified. Bold items: 60% lot coverage, 20 ft front perimeter setback. See § 18.10.090 (development standards subsections) and the planned residential detail paragraphs. (§ 18.10.090)
  • Procedures/review: PRD is processed under Chapter 18.63 (Site & Architectural Review) and may require a tentative map under Title 17. (§ 18.10.090.D; § 18.63)

R3 / R3-S / R3‑20 / R3‑24 (Multiple residential districts)

  • Purpose / uses: R3 and R3 variants govern medium to high density multifamily housing; Table 18.10.030 lists permitted residential uses and accessory uses. (§ 18.10.030)
  • Key numeric items captured in the code:
    • R3 minimum lot size 12,000 sq ft; maximum density 12 du/acre (R3). (§ 18.10.030 and explanatory subsections)
    • R3‑S (senior) density limited to 20 du/acre; specific plan process required (no more than 20 units/acre). (§ 18.10.030; R3‑S note)
    • R3‑24 has minimum 20 du/acre and maximum 24 du/acre where adopted. (§ 18.10.030)
  • Multifamily design, entries, spacing, common open space and sustainable design rules are captured in Chapter 18.64 (LEED Platinum requirement for multifamily, building entry orientation, spacing, amenity tables). See § 18.64.040, § 18.64.050, § 18.64.060. Bold items: LEED Platinum requirement for multifamily/mixed‑use (Chapter 18.64). (§ 18.64.040; § 18.64.050; § 18.64.060)

Accessory Dwelling Units (ADUs) / Junior ADUs

  • Local ADU rules: Grand Terrace adopts a local ADU chapter with specific development and parking rules; design standards require ADU materials and roof pitch to match the primary dwelling and a minimum 4 ft side/rear setback for new ADUs unless converting existing structure. See Chapter 18.69 (design § 18.69.060 and parking § 18.69.070). Bold items: 4 ft side/rear ADU setbacks (minimum), one new parking space per ADU (with enumerated exceptions). (§ 18.69.060; § 18.69.070)
  • Second units / two‑unit developments (distinct chapter): Chapter 18.65 sets ministerial approval standards for second units and two‑unit developments, unobstructed space, and deed restriction/impact fees. See § 18.65.020–.090. (§ 18.65.020; § 18.65.080; § 18.65.090)
  • State ADU law interaction: Grand Terrace references and implements ADU rules consistent with state law; where the local code conflicts with state minimums, Government Code standards may control (grand overview in ADU chapter). Noted design/parking exceptions in § 18.69.070 refer to standard state exceptions (e.g., within 1/2 mile of transit). (§ 18.69.070)

Quick reference table — selected, decision‑relevant standards

District Typical permitted uses (short) Key numeric standards (decision‑relevant) Code Reference
AP Professional offices Front setback 15 ft, Height 35 ft, Min lot 10,000 sf, Lot coverage 100% § 18.30.040
C2 General business / retail Front setback 25 ft, Height 35 ft, Min lot 10,000 sf, Lot coverage 100% § 18.33.040
M2 Industrial / manufacturing Front setback 25 ft (10 ft landscape), Height 35 ft, Min lot 20,000 sf § 18.40.050
AG‑2 (Overlay) Ag / animal keeping overlay Min lot 1 acre, Front setback 40 ft, Lot coverage 40%, Height 35 ft § 18.56.060
Planned Residential (R2/R3) Multi‑family/residential planned projects Perimeter setbacks: front 20 ft / rear 15 ft / side 10 ft; Lot coverage ≤60% (PRD); density = underlying zone § 18.10.090 (PRD dev. standards)
ADU (local) Accessory dwelling units / JADUs Side & rear setbacks 4 ft min (unless conversion), ADU height limits & parking rules in § 18.69 § 18.69.060; § 18.69.070

Practical guidance / synthesis

  • Site plan basics: For any development, follow the underlying district numerical standards listed above for setbacks, height and lot coverage; multifamily projects must additionally follow Chapter 18.64 for design, entries, spacing, and sustainability (LEED Platinum) requirements (§ 18.64.040–.050). (§ 18.64.040; § 18.64.050)
  • Review triggers: Projects that exceed thresholds (lot coverage > 25%, additions > 65% of main dwelling, new construction > 6 ft, or projects requiring zoning relief) will be subject to administrative or public Site & Architectural Review under Chapter 18.63; this chapter explicitly evaluates setbacks, height, lot coverage and design. (§ 18.63.020–.030)
  • Parking and landscaping: Off‑street parking requirements are in Chapter 18.60; note specific ADU parking exceptions in § 18.69.070. Landscaping and screening requirements and street‑tree rules are implemented via Chapter 15.56 (MWELO reference in multifamily chapter) and Chapter references in multifamily standards. (§ 18.60; § 18.69.070; § 18.64.040)
  • Specific plans & overlays: Specific plans (e.g., Gateway at Grand Terrace) and overlay districts can supersede or add standards; always check the specific plan chapter first for parcels in those areas (Chapter 18.20 and overlay chapters). (§ 18.20.010)

Checklist

  • Confirm zoning district(s) on subject parcel and which specific plan or overlay (if any) applies. (Verify district map) (§ 18.09.020)
  • Pull the numeric standards for that district: front/side/rear setbacks, maximum height, minimum lot size, lot coverage (use the district § referenced above). (e.g., § 18.30.040, § 18.33.040, § 18.40.050, § 18.56.060)
  • For multifamily or mixed‑use proposals, confirm Chapter 18.64 requirements (LEED, entries, setbacks between buildings, amenity minimums). (§ 18.64.040–.060)
  • For ADUs/JADUs, confirm Chapter 18.69 design and parking exceptions and the Chapter 18.65 rules for second units/two‑unit developments where relevant. (§ 18.69.060; § 18.69.070; § 18.65.020)
  • Prepare plans that demonstrate compliance with the numeric standards and the objective design standards so the Director can determine if the project can be ministerially approved per Chapter 18.63. (§ 18.63.020; § 18.63.030)
  • Check parking calculations (Chapter 18.60) and whether on‑street credits or ADU parking exceptions apply. (§ 18.60; § 18.69.070)

Risks & Ambiguities

Issue Why it matters What to verify
R1 district numeric setbacks / lot coverage not listed in retrieved excerpts Many single‑family decisions hinge on precise R1 setbacks and coverage; missing numbers block accurate feasibility checks Verify the precise R1‑20 / R1‑10 / R1‑7 numeric table in the code (Not found in retrieved materials). (§ — Not found in retrieved materials)
Specific plan overrides Specific plans may supersede Title 18 standards for parcels inside the plan (e.g., Gateway SP) Confirm whether parcel is inside a specific plan (Chapter 18.20) and use that plan's standards first. (§ 18.20.010)
ADU state vs. local standards State ADU law imposes ceilings/floors that may preempt local rules (size, setbacks, parking in specific cases) For borderline ADU proposals, compare local Chapter 18.69 to the current state ADU rules; when in doubt, apply state minimums. (§ 18.69.070; state law references — Not in retrieved materials)
Multifamily sustainability requirement (LEED Platinum) Adds permitting cost and submittal requirements for multifamily/mixed‑use Expect LEED‑level evidence as part of design submittal per § 18.64.040. Verify acceptable "equivalent standard" with Director. (§ 18.64.040)
Parking credits or exemptions Parking affects lot layout and achievable FAR/useable floor area Check Chapter 18.60 and ADU § 18.69.070 for on‑street parking credit rules and ADU exceptions. (§ 18.60; § 18.69.070)

Plain‑English summary

Grand Terrace regulates how tall and how close to property lines buildings can be through Title 18. For commercial and professional zones (like C2 and AP) the code explicitly lists front setbacks (typically 15–25 ft) and caps height at 35 ft; industrial zones set larger lots and landscape setbacks; multifamily projects and ADUs have additional design and parking rules captured in Chapters 18.64, 18.65, and 18.69. Always confirm whether a specific plan or overlay changes the numbers for your parcel. (§ 18.33.040; § 18.30.040; § 18.40.050; § 18.64; § 18.65; § 18.69)

Source References

  • Grand Terrace Zoning: Title 18, Chapter 18.03 et seq.; zoning adoption and general provisions — § 18.03.010–.060.
  • AP district site development standards — § 18.30.040.
  • C2 district site development standards — § 18.33.040; permitted uses Table 18.27.010.
  • M2 district site development standards — § 18.40.050; outdoor storage screening § 18.40.060.
  • Planned Residential Development rules (process, density, lot coverage, setbacks) — § 18.10.090.
  • Multifamily / Mixed‑Use design & sustainability — Chapter 18.64 (e.g., § 18.64.040, § 18.64.050, § 18.64.060).
  • Second units / two‑unit developments — Chapter 18.65 (e.g., § 18.65.020, § 18.65.060–.090).
  • Accessory Dwelling Units (ADUs) — Chapter 18.69 (notably § 18.69.060 design and § 18.69.070 parking).
  • Site & Architectural Review — Chapter 18.63 (scope, application types and issues considered).
  • Specific plans and special areas — Chapter 18.20 (e.g., Gateway at Grand Terrace SP reference).

Sources

Retrieved passages

  • Grand Terrace Zoning Code High relevance
  • Grand Terrace Zoning Code (§ 5) High relevance
  • CBC § 8 (§ 8) High relevance
  • Grand Terrace Zoning Code (Section 65915) High relevance
  • Grand Terrace Zoning Code (Title and) High relevance
  • Grand Terrace Zoning Code (Chapter 18.63) High relevance
  • CBC § 500 (Chapter 18.60) High relevance
  • CBC § 5 (§ 5) High relevance
  • Grand Terrace Zoning Code (§ 5) High relevance
  • CBC § 15 (§ 15) High relevance
  • Grand Terrace Zoning Code (§ 16) Medium relevance
  • Grand Terrace Zoning Code (§ IV) Medium relevance
  • Grand Terrace Zoning Code (Section 21000) Medium relevance
  • Grand Terrace Zoning Code (§ 8) Medium relevance
  • Grand Terrace Zoning Code (§ 16) Medium relevance
  • Grand Terrace Zoning Code (Chapter 18.63) Medium relevance
  • Grand Terrace Zoning Code (Section 18.63.070) Medium relevance
  • Grand Terrace Zoning Code Medium relevance

Cited sections

Frequently asked questions

What can I build on an AP lot in Grand Terrace?

AP (Administrative Professional) is intended for professional office uses; the local permitted uses table references Table 18.27.010 for allowed uses, and the site development numeric standards are in § 18.30.040 (min lot 10,000 sf; front setback 15 ft; height 35 ft). Check Table 18.27.010 for specific uses and confirm site plan needs under Chapter 18.63. (§ 18.30.040; § 18.27.010)

What are Grand Terrace setback requirements for C2 parcels?

The C2 district sets a 25 ft front yard setback, rear yard 0 ft (but 10 ft when adjacent to an R district), side yard 0 ft (10 ft adjacent to R), and a 35 ft height cap; these are in § 18.33.040. Always verify whether a specific plan or an overlay modifies those numbers. (§ 18.33.040)

How much lot coverage can I use for a planned residential development?

For a planned residential development the municipal code states lot coverage shall not exceed 60% of the lot area (PRD standards) while recognizing that specific plans can set different project‑level standards; see § 18.10.090 (PRD development standards). (§ 18.10.090)

Do multifamily projects have special design or sustainability requirements?

Yes. Chapter 18.64 requires multifamily and mixed‑use residential projects to meet objective design standards (entries, spacing, windows, landscaping) and a sustainable design requirement—applications must demonstrate compliance with LEED Platinum or an equivalent standard (see § 18.64.040–.050). (§ 18.64.040; § 18.64.050)

What are the ADU setback and parking rules in Grand Terrace?

Local ADU rules require minimum 4 ft side and rear setbacks for new ADUs unless converting or rebuilding in the same footprint; ADU parking requires one new space per ADU except where statutory exceptions apply (within 1/2 mile of transit, within a historic district, ADU inside main dwelling, on‑street permit rules, or nearby car‑share). See § 18.69.060 (design) and § 18.69.070 (parking). (§ 18.69.060; § 18.69.070)

When will I need Site & Architectural Review in Grand Terrace?

Site & Architectural Review (Chapter 18.63) applies to projects that exceed administrative thresholds or involve public hearings. Examples include most new multifamily projects, projects that alter lot coverage above thresholds, or projects requiring discretionary findings. Small accessory work may be handled administratively if it meets objective standards. See § 18.63.020–.040 for application types and scope. (§ 18.63.020; § 18.63.030)

What are typical R3 standards — lot size and density?

The code states R3 minimum lot size 12,000 sq ft and R3 maximum density 12 du/acre, with R3‑S (senior) and R3‑20/R3‑24 variants establishing higher density caps (R3‑S and R3‑20 up to 20 du/acre; R3‑24 up to 24 du/acre where applicable). See the R3 subsections and Table 18.10.030. (§ 18.10.030)

Can a specific plan change the zoning numeric standards?

Yes. Specific plans referenced in Chapter 18.20 (for example The Gateway at Grand Terrace specific plan) can supersede Title 18 standards where the specific plan addresses an issue; if a specific plan is silent the general Title 18 standards apply. (§ 18.20.010)

Where do I find Grand Terrace parking rules that affect lot coverage?

Off‑street parking standards are in Chapter 18.60 and the ADU chapter § 18.69 modifies parking obligations for ADUs. Use both chapters together to determine required spaces and whether on‑street credits apply. (§ 18.60; § 18.69.070)

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