Local zoning · Portola

Portola — Parking

Q: What parking ratio applies to a new 2‑bedroom apartment in Portola?

Use the multi‑family rates in § 17.40.030 : 2 per unit for 2+ bedrooms; projects with 10+ units also must add guest parking at the rate of 1 space per 10 units (round up) — see § 17.40.030 (residential table) .

Q: Do downtown Portola businesses have to provide off‑street parking?

Many principally permitted uses inside the Downtown Core (DC) and Old Town (OT) overlays may be permitted without providing additional off‑street parking per § 17.40.030(D) ; however community assembly, colleges/universities, and discretionary new uses must provide parking or request a reduction/variance — verify parcel location and use in § 17.28.030–.040 and § 17.40.030(D) .

Q: How many bicycle racks do I need for a 60‑space parking lot?

The code requires one bicycle space per 20 required vehicle spaces up to 100 . For 60 vehicle spaces you would need at least 3 bicycle spaces (60 / 20 = 3) per § 17.40.020(C) .

Q: What are the minimum parking stall and aisle dimensions Portola requires?

Standard stall size is 9' x 18' , compact 8' x 16' , parallel 10' x 22' ; accessible stalls follow Title 24. Minimum two‑way aisle for 90° stalls is 24' (see § 17.40.040(A) for full geometry, compact/motorcycle substitution, and curb/wheel‑stop rules) .

Parking under the Portola local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page summarizes what the City of Portola's Title 17 (Zoning) requires about parking — off-street vehicle stalls, loading, and bicycle parking — and where those rules change by district or overlay. The controlling ordinance text is in Title 17 — ZONING, primarily Chapter 17.40 (Off‑Street Parking and Loading); read this chapter first for the basic rules and design standards (see § 17.40.010–.040) . For related topics you will also want the city’s maps and development standards: see the links below for the city zoning map, development standards, overlays, design review and ADU rules.

First-use links in prose: the city’s zoning overview and the Portola Zoning and Development Standards pages are where applicants typically start. The code requires compliance with the California Building Standards Code for accessible parking dimensions, and the code ties into local design review, overlay districts, and ADU rules where applicable.

Key takeaways: the City sets use‑based minimums in § 17.40.030, vehicle and compact stall dimensions and aisle widths in § 17.40.040, a bicycle‑parking minimum in § 17.40.020(C), and special downtown/old‑town parking relief in § 17.40.030(D) and the overlay rules (§ 17.28.030–.040) .

District-by-district (what matters for parking)

Note: Title 17 establishes the primary zone districts in § 17.10.010; those district labels are the ones used throughout the parking tables and overlays . Below I show the districts named in the ordinance and how the parking rules apply in each. Where the code does not include a district-specific parking number, the use‑based table in § 17.40.030 controls.

Rural Residential (RR)

Purpose / where shown: established in § 17.10.010 as RR (see zoning map) .
Typical permitted uses: rural single‑family and accessory uses — see Article II for full list (not reproduced here).
Parking standard: default residential standards apply (generally 2 per dwelling for single‑family / two‑family unless otherwise stated) per § 17.40.030 .
Practical note: driveways and garages count as required spaces provided they meet setback/placement rules in Article II (front/setback restrictions apply; see § 17.40.040(C)) .

Low Density Residential (LDR)

Zone label: LDR (§ 17.10.010) .
Parking: residential ratios in § 17.40.030 govern; second/ accessory units follow § 17.70.040(G) for ADU/second unit parking (each studio/1‑bed ADU requires 1 off‑street space) .

Medium Density Residential (MDR)

Zoning label MDR; also specifically referenced for density bonus applicability in § 17.43.010 (so modified parking standards for density‑bonus projects can apply) .
Parking: multi‑family ratios (e.g., 1.5 per studio/1‑bed; 2 per 2+ bed) and guest parking rules are in § 17.40.030; density bonus projects may request modified/maximum reduced ratios under § 17.43.090 .

High Density Residential (HDR)

HDR — similar to MDR for parking control; density bonus applicability and modified parking rules (see § 17.43) apply in HDR as well .

Core Commercial (CC), Commercial Mixed Use (CMU), Service Commercial (SC)

Commercial zones CC, CMU, SC are listed in § 17.10.010 and use the commercial parking ratios in § 17.40.030 (retail/service, restaurants, adult businesses, automotive uses, etc.) .
Special downtown/old‑town treatment: parcels inside the Downtown Core (DC) or Old Town (OT) overlays may be allowed to operate without providing additional off‑street parking for principally permitted uses (see § 17.40.030(D) and the overlay code at § 17.28.030–.040) .

Business Professional/Light Industrial (BP/LI)

Industrial/office use parking rates are listed in § 17.40.030 (see the commercial tables); loading and maneuvering standards and surfacing/aisle geometry rules in § 17.40.040 apply for service/warehouse uses .

Utilities (U), Public/Quasi‑Public (P/QP), Parks (PR), Open Space/Conservation (OSC)

These zone labels appear in § 17.10.010; parking demand for civic/public uses is addressed in the Civic table of § 17.40.030 (many are “as determined by the planning commission”) .

Old Town (OT) overlay

The Old Town (OT) overlay is established in § 17.28.030; it is explicitly intended to allow selected parcels to modify parking requirements because lots/streets are narrow — see the overlay purpose and the cross‑reference to § 17.40.030(D) for the parking exemption rules .

Downtown Core (DC) overlay

The Downtown Core (DC) overlay is established in § 17.28.040 for parcels along Highway 70; it can modify parking requirements per § 17.40.030(D). Principally permitted uses in DC and OT (with exceptions) may not need to provide additional off‑street parking; discretionary/new uses still follow the standard tables or must apply for reductions/variances .

Floodplain (FP) overlay

Floodplain (FP) is an overlay in § 17.10.010(B); the floodplain chapter allows accessory parking areas as permitted accessory uses in the FP overlay, but other development actions in FP are subject to flood‑encroachment rules and may be restricted (see the floodplain provisions quoted in the code) .

Quick reference table — common parking minimums (decision‑relevant)

Use (typical)	Required parking (Portola)	Code Reference
Single‑family / Two‑family dwelling	2 per dwelling	§ 17.40.030 (residential table)
Multi‑family (studio / 1‑bed)	1.5 per unit (+ guest parking rules)	§ 17.40.030 (residential table)
Multi‑family (2+ bed)	2 per unit	§ 17.40.030 (residential table)
Second unit / ADU (studio/1‑bed)	1 off‑street space (may be in front setback)	§ 17.70.040(G) (ADU/second unit parking)
Retail / general commercial	Table rates in § 17.40.030 — typical 1 per 400 sq ft or as listed for specific uses	§ 17.40.030 (commercial table)
Places of worship / assembly	1 per 4 fixed seats or 1 per 50 sq ft (as specified)	§ 17.40.030 (civic table)
Bicycle parking	1 bicycle space per 20 required vehicle spaces up to 100; additional as determined by PC	§ 17.40.020(C)
Accessible parking	Must meet Title 24 (California Building Standards Code) (counts toward total)	§ 17.40.020(A) + California Building Standards Code

See § 17.40.030 for the full, use‑by‑use matrix (automotive uses, gas stations, carwashes, schools, hospitals, etc.) and § 17.40.040 for stall sizes, compact substitution, aisle widths, surfacing, bike racks, curb stops and loading design requirements .

Information Gaps (what the code as retrieved does not show)

Full, district‑level purpose and permitted‑use lists for every primary district (for exact permitted uses in RR, LDR, CC, etc.) are in Article II but those full lists were not included in the retrieved snippets; verify permitted uses for parcel‑level analysis in Article II (the Zoning Map + Article II) — see § 17.10.020 for map adoption .
Any local amendments or recent ordinances (post‑print) that change parking numbers, EV charging readiness, or bicycle parking minimums beyond the excerpts provided — verify with the Planning Department.
Specific design‑review triggers and site‑specific loading stall dimensions are determined through design review in some cases; those details live in the design‑review chapter and application checklists — confirm via the Portola Design Review page and planning staff.

Checklist

Confirm the zoning district for the parcel on the City of Portola Zoning Map (§ 17.10.020) .
Determine required vehicle spaces from § 17.40.030 (use‑based table) and round up to whole spaces .
Provide required accessible stalls to Title 24 standards (counts toward total) and dimension per § 17.40.040(A)(1)(a) .
Provide bicycle spaces: 1 per 20 required vehicle spaces up to 100, then as required by PC (§ 17.40.020(C)) .
Design parking lot layout to meet stall sizes, aisle widths, compact/ motorcycle substitution rules and surfacing (§ 17.40.040) .
If in Old Town (OT) or Downtown Core (DC) overlay, confirm whether the use is a principally permitted use and thus eligible for the parking relief in § 17.40.030(D) and § 17.28.030–.040 .
If proposing a reduction from the table, prepare a parking study and apply for an administrative permit or variance as required by § 17.40.030(C) and related parts .
For ADUs/second units, ensure § 17.70.040(G) parking compliance (one required space for studio/1‑bed ADU; may be in front yard setback) .
Include loading location/size in site plans and expect loading design to be reviewed during design review; no truck backups into public right‑of‑way (§ 17.40.040(F)) .

Risks & Ambiguities

Issue	Why it matters	What to verify
Overlay parking exemptions (OT / DC)	Some parcels inside OT/DC can avoid providing off‑street parking for principally permitted uses; misreading this can underpark a site and fail review	Confirm overlay boundaries on the zoning map and whether the proposed use is a “principally permitted” use or a discretionary use (see § 17.40.030(D) and § 17.28.030–.040)
Which line in the commercial table applies	The commercial table has many specific rows (gasoline sales, carwash, restaurant, automotive) — using a wrong row miscalculates requirements	Match your exact use to the code’s use descriptions in § 17.40.030; if ambiguous, the director/planning commission interpretation rules apply (see § 17.07.010–.020)
Bicycle parking adequacy	The ordinance gives a minimum (1/20 seats) but allows the Planning Commission to require more	Confirm whether a Transportation Systems Management plan or project conditions increase bicycle requirements (§ 17.40.020(C))
ADU parking vs. state ADU law	Local ADU rule requires one space for studio/1‑bed; state law has changed timing and entitlement rules that may supersede local rules	Verify current state ADU rules and how they interact with § 17.70.040; consult planning staff for parcel‑specific application of state law
Accessible parking (Title 24)	Portola requires compliance with Title 24; incorrect dimensions or signage will fail building inspection	Use the California Building Standards Code standards plus § 17.40.020(A) for counting and design

Plain‑English Summary

Portola’s zoning code (Title 17) makes you provide off‑street parking based on the use type (the tables in § 17.40.030), design those stalls and aisles to the sizes in § 17.40.040, supply bicycle racks (one per 20 vehicle stalls up to 100) in § 17.40.020(C), and follow accessible stall rules in Title 24; downtown/old‑town parcels may be given relief from off‑street parking in many cases — check the overlay map and the exact use before you design a lot .

Source References

Title 17 — ZONING, Portola Municipal Code (Title 17). Key excerpt: § 17.10.010 (zoning districts) .
Chapter 17.40 — OFF‑STREET PARKING AND LOADING; includes § 17.40.010 (purpose), § 17.40.020 (general rules, bicycle spaces), § 17.40.030 (parking space requirements by use type), and § 17.40.040 (parking design) .
Overlay rules: § 17.28.030 (Old Town (OT)) and § 17.28.040 (Downtown Core (DC)) — parking relief cross‑references to § 17.40.030(D) .
ADU / second unit rules with parking requirement: § 17.70.040(G) (one space for studio/1‑bed ADU; may be in 20‑ft front setback) .
Density bonus / modified parking standards authority: Chapter 17.43 and § 17.43.090 (modified parking for eligible projects) .
Design standards for special uses, outdoor seating and parking additions: § 17.61.020(F) (outdoor restaurant seating parking addition) and related chapters .
California Building Standards Code — referenced by the ordinance for accessible parking stall dimensions (Title 24) — see California Building Standards Code and the code citations in § 17.40.020(A) .

Sources

Retrieved passages

Portola Zoning Code (Chapter 17.40) High relevance
Portola Zoning Code (Section 17.46.) High relevance
Portola Zoning Code (Section 17.40.030) High relevance
Portola Zoning Code (Section 17.46.020) Medium relevance
Portola Zoning Code (Article II) Medium relevance
Portola Zoning Code (Section 17.37.020) Medium relevance
CBC § 256 Medium relevance
Portola Zoning Code (§ 65915) Medium relevance
Portola Zoning Code (section shall) Medium relevance
CBC § 2 (§ 2) Medium relevance

Cited sections

Official Portola code library

Frequently asked questions

What parking ratio applies to a new 2‑bedroom apartment in Portola?

Use the multi‑family rates in § 17.40.030: 2 per unit for 2+ bedrooms; projects with 10+ units also must add guest parking at the rate of 1 space per 10 units (round up) — see § 17.40.030 (residential table) .

Do downtown Portola businesses have to provide off‑street parking?

Many principally permitted uses inside the Downtown Core (DC) and Old Town (OT) overlays may be permitted without providing additional off‑street parking per § 17.40.030(D); however community assembly, colleges/universities, and discretionary new uses must provide parking or request a reduction/variance — verify parcel location and use in § 17.28.030–.040 and § 17.40.030(D) .

How many bicycle racks do I need for a 60‑space parking lot?

The code requires one bicycle space per 20 required vehicle spaces up to 100. For 60 vehicle spaces you would need at least 3 bicycle spaces (60 / 20 = 3) per § 17.40.020(C) .

Can I put required ADU parking in the front setback?

Yes — the ADU/second‑unit parking rule allows the required one space for a studio/one‑bed ADU to be provided within the 20‑foot front yard setback per § 17.70.040(G); check the exact setback measurement on your lot and confirm ADA/title 24 needs do not conflict .

What are the minimum parking stall and aisle dimensions Portola requires?

Standard stall size is 9' x 18', compact 8' x 16', parallel 10' x 22'; accessible stalls follow Title 24. Minimum two‑way aisle for 90° stalls is 24' (see § 17.40.040(A) for full geometry, compact/motorcycle substitution, and curb/wheel‑stop rules) .

If my use does not fit a table row, how is parking calculated?

The code says parking for uses not specifically listed is to be determined by the planning commission or the director; applicants can request an administrative permit with a parking study to support a reduction under § 17.40.030(C) (burden of proof on applicant) .

Are loading spaces regulated in Portola?

Yes — loading requirements and the requirement that no truck backup maneuvering occur in the public right‑of‑way are in § 17.40.040(F); the location, number and size of loading areas are subject to design review .

Does Title 24 still control accessible‑stall dimensions for Portola?

Yes. Portola requires accessible parking to meet Title 24 (California Building Standards Code) and counts those spaces toward the total required by the zoning tables per § 17.40.020(A); always confirm the current Title 24 edition for dimensions and signage requirements .

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