Local zoning · Corte Madera

Corte Madera — Variances and Exceptions

Variances and Exceptions under the Corte Madera local zoning and planning code, with the controlling citations.

Last reviewed: July 1, 2026

Overview

Variances and exceptions in Corte Madera are handled under the Town's zoning ordinance (Title 18). Variances are discretionary deviations from objective zoning standards granted to avoid practical difficulties; exceptions are handled separately through overlay chapters or specific programs such as the Two‑Unit (ministerial) review for state-mandated housing. See the Town's Corte Madera Zoning page for general orientation. (§ 18.28.010)

Note: this page stays strictly within the Town zoning ordinance (Title 18). For building‑code issues see the California Building Standards Code. Link references to related local topics are embedded where they first appear below.

How Corte Madera’s variance system works (quick)

Who can decide: the Planning Commission or the Zoning Administrator may grant variances; the Zoning Administrator may refer controversial or policy‑level applications to the Planning Commission. § 18.28.040
What can be varied: site area, height, density, lot frontage/width, signs, and off‑street parking/loading, among others — but a variance cannot authorize a use that is not permitted in the zone. § 18.28.010; § 18.28.040
Required findings: Corte Madera requires five general findings for all variances plus special findings for parking/loading variances. § 18.28.060
Procedure basics: application + fee, notice (mailing) and hearing rules, effective/appeal period, lapse, and revocation provisions apply. § 18.28.030; § 18.28.050; § 18.28.070; § 18.28.080; § 18.28.090

Below is a Corte Madera–specific breakdown of the zoning districts most often involved in variance requests and the local rules that commonly interact with variances.

(First time we mention these supporting topics they are linked inline:)

Corte Madera Zoning & planning overview: Corte Madera zoning & planning overview
Development standards and dimensional terms: Corte Madera Development Standards
Parking rules and parking variances: Corte Madera Parking
Design review interactions: Corte Madera Design Review
Special overlays and exceptions: Corte Madera Overlay Districts
ADU rules and ADU‑specific exceptions: Corte Madera ADUs
State building code (for building permit interplay): California Building Standards Code

District-by-district guidance (what to expect when seeking a variance)

Notes on format: district names and numeric standards are bolded; the legal authority for each district standard appears after the description.

R-1 (Medium‑Density Residential)

Purpose / typical uses: single‑family dwellings and accessory residential uses consistent with residential density objectives. See the R‑1 development standards and FAR rules in the R‑1 chapter. § 18.08.200 – 18.08.230
Key dimensional standards (where an applicant typically needs a variance):
- Front yard: 20 ft (if lot ≥7,500 sq ft) or 15 ft (if smaller) — § 18.08.220(a)
- Side yards: 6 ft (larger lots) or 5 ft (smaller lots); street side 15 ft or 10 ft depending on lot size — § 18.08.220(b)
- Rear yard: 25 ft (permitted) / 35 ft (conditional) — § 18.08.220(d)
- Coverage: example limits and FAR rules are in the R‑1 section and Chapter 18.24 measurement rules — § 18.08.220; § 18.24.080
Where it applies: parcels zoned R‑1 on the Official Zoning Map; variances here are commonly sought for setbacks, lot coverage, or height where unique topography or lot shape exists. § 18.08.200

R-1‑A (Low‑Density Residential)

Purpose / uses: low‑density single‑family; additional restrictions on new lot creation. § 18.08.300 – 18.08.320
Key dimensional standards:
- Front yard: 25 ft; Side yard: 10 ft (permitted) / 15 ft (conditional); Rear yard: 35 ft (permitted) / 45 ft (conditional); Height: 30 ft. § 18.08.320 (a–f)
Where it applies: parcels zoned R‑1‑A; expectations for variances are stricter because of larger lot minimums — see Chapter 18.18 overlays exceptions where applicable. § 18.08.300

R-1‑B (Very Low‑Density) and R-1‑C (Open Residential)

Purpose / uses: very low density and open/large‑lot residential with correspondingly larger yards and tighter coverage. § 18.08.400; § 18.08.500
Key dimensional standards:
- R‑1‑B: Front yard 30 ft; Side yard 20 ft; Rear yard 50 ft; Coverage 15%; Height 30 ft. § 18.08.410
- R‑1‑C: Front yard 35 ft; Side yard 25 ft; Rear yard 100 ft; Height 30 ft (coverage set through design review). § 18.08.520
Where it applies: neighborhoods mapped as R‑1‑B or R‑1‑C; variances for these districts must make especially strong findings about special circumstances due to the rural/open intent. § 18.28.060

R-2 and R-3 (Multiple‑Dwelling)

Purpose / uses: duplexes and multi‑family housing. Standards appear in Chapter 18.08 (development standards table and district sections) and the R‑2/R‑3 sections. Table 1 in Chapter 18.08 summarizes unit density, setbacks, and lot area across residential districts. (See Table and Chapter references.) Table 1 / Chapter 18.08
Where variance questions commonly arise: density, lot area per unit, and parking for multi‑unit conversions where a strict interpretation would cause practical difficulty. Note the code requires conformity with the general plan and other chapters before special approvals. § 18.24.010; § 18.24.020

MX‑1 (Mixed‑Use) — Neighborhood Zone and Highway Zone

Purpose / typical uses: mixed commercial/residential along Tamal Vista Boulevard and highway‑fronting parcels with two subzones: Neighborhood Zone and Highway Zone. See the MX‑1 district standards for frontages, transparency requirements, and size limits for neighborhood‑scale commercial uses. § 18.13.020 et seq.; § 18.13.125–18.13.185
Key dimensional standards:
- Neighborhood Zone front yard not adjoining Tamal Vista Boulevard: 20 ft; streetscape standards; upper‑story setbacks of 10 ft for stories above the first. § 18.13.125; § 18.13.170
- Neighborhood Zone height cap: 25 ft / two stories; Highway Zone: 35 ft / three stories (subject to specific exceptions). § 18.13.165
Where it applies: MX‑1 parcels identified on the Official Zoning Map; variances here often involve upper story setbacks, increased height allowances (which the Planning Commission may grant under § 18.13.165(d)), and parking. § 18.13.165; § 18.13.170; § 18.13.185

Special Purpose Overlay Districts (exceptions handled separately)

Corte Madera uses overlay chapters (Chapter 18.18) to authorize variations of site development standards through a different mechanism. A variance is not required where the overlay specifically authorizes variations; conversely some overlays require special findings. § 18.28.020
Example: the Town’s Urban Lot Split / Two‑Unit Development provisions let the Zoning Administrator waive or modify limited standards to avoid precluding two 800‑sq‑ft units as required by state law — see the Two‑Unit Development chapter for ministerial exceptions. § 18.31A.050; Chapter 18.18

Quick reference table — common variance triggers and the Corte Madera code reference

What you need a variance for	What Corte Madera allows or requires	Code Reference
Variance purpose / authority	Planning Commission or Zoning Administrator may grant variances for site area, height, density, lot frontage/width, signs, and off‑street parking/loading; cannot grant an unpermitted use	§ 18.28.010; § 18.28.040
Required findings (general)	Five findings: special circumstances, hardship, no special privilege, not detrimental, consistent with objectives/General Plan	§ 18.28.060(1)
Additional parking/loading findings	Separate three findings about traffic, street parking impacts, and public safety	§ 18.28.060(2)
Application steps & notices	File application/fee; notice mailed; hearing rules; 10‑day effective/appeal window	§ 18.28.030; § 18.28.050; § 18.28.070
Lapse & renewal	Variance lapses 1 year if building permit/commencement not started; possible one‑year renewal in narrow circumstances	§ 18.28.080
ADU setbacks & ministerial exceptions	ADU side/rear setbacks 4 ft (with some special reductions); Town must reduce front setback if it would preclude an 800‑sq‑ft ADU per state law; ADUs subject to their chapter’s development standards	§ 18.31.080(d); ADU ministerial rules § 18.31
Two‑Unit (state) exceptions	Zoning Administrator may grant limited exceptions to allow two‑unit development consistent with Government Code § 65852.21 to avoid physically precluding two 800‑sq‑ft units	§ 18.31A.050(c)(3)

Checklist (what an applicant must submit / satisfy for a variance in Corte Madera)

Complete variance application and required fee filed with Planning Department. § 18.28.030
Evidence demonstrating the five general findings (special circumstances of the property, hardship, no special privilege, no detriment to public welfare, consistency with General Plan). § 18.28.060(1)
For parking/loading variances, additional evidence addressing traffic generation and street parking impacts. § 18.28.060(2)
Site plans showing dimensions, setbacks, lot coverage and how the project relates to the underlying district standards in Chapter 18.08 or other applicable district chapter. See Corte Madera Development Standards. § 18.24.080
If the property lies in an overlay (Chapter 18.18) disclose how overlay standards apply and whether the overlay already authorizes variations. § 18.28.020
Mailing list of nearby property owners (as required for notice) and readiness to attend public hearing (if Planning Commission hearing required). § 18.28.050; § 18.36.040
If seeking an ADU related exception, include ADU-specific plans and demonstrate compliance with the ADU chapter rules; note the Town’s ability to reduce front setback in limited ADU circumstances. § 18.31.080; § 18.31A.050

Risks & Ambiguities

Issue	Why it matters	What to verify
Strength of findings (special circumstances & hardship)	Corte Madera requires all five findings—weak or generic hardship claims will likely fail.	Verify site‑specific evidence (topography, lot shape, existing structure locations) and craft factual findings tied to § 18.28.060(1).
Parking variances	Parking variances carry extra findings about traffic and street parking impacts. An approval that increases on‑street parking risk can be overturned.	Provide traffic/parking study; tie justification to § 18.28.060(2).
Overlap with overlays	Some overlay districts (Chapter 18.18) allow variations without a variance; seeking a variance when an overlay mechanism applies can cause procedural delay.	Confirm whether Chapter 18.18 applies to the parcel and whether it already authorizes the needed modification. § 18.28.020
ADU exceptions vs. variances	State ADU law and the Town’s ADU chapter create narrow ministerial exceptions (e.g., front‑setback reductions to allow an 800‑sq‑ft ADU). Applying for a discretionary variance instead may be slower and less predictable.	For ADU projects confirm ADU ministerial path under § 18.31 before pursuing a variance; Town will reduce front setback in specified cases. § 18.31.080; § 18.31A.050
Expiration / lapse	Variance approvals lapse one year if no building permit/commencement — approval without progress can be lost.	If construction timelines are slow, consider applying for renewal before the one‑year lapse per § 18.28.080.
Design review interplay	Some dimensional relaxations can trigger or require design review; conditions of design review can constrain the practical value of a variance.	Verify whether Design Review (Chapter 18.30) will be required and align materials/mitigation to satisfy § 18.30 standards. Not found in retrieved materials: specific cross‑reference text for every variance/design review trigger. Verify with the Planning Department.

Plain‑English summary

If your Corte Madera property can't meet a numeric zoning rule because of a real, site‑specific constraint (shape, topography, existing building location), you can apply for a variance; the Town will only grant it if you show clear special circumstances, real hardship from applying the rule, that the change won't give you a special privilege or harm neighbors, and that it fits the Town's goals. The Zoning Administrator or Planning Commission decides and parking variances need extra proof about traffic/parking impacts. § 18.28.010; § 18.28.060

Source References

Corte Madera Municipal Code, Title 18 — Chapter 18.28, Variances: § 18.28.010; § 18.28.020; § 18.28.030; § 18.28.040; § 18.28.050; § 18.28.060; § 18.28.070; § 18.28.080; § 18.28.090.
Chapter 18.24, General Provisions and Exceptions (setbacks, measurement rules): § 18.24.020; § 18.24.040; § 18.24.050; § 18.24.060; § 18.24.070; § 18.24.080.
R‑1 District rules: § 18.08.200; § 18.08.220 (setbacks, FAR, height).
R‑1‑A rules: § 18.08.300; § 18.08.320.
R‑1‑B and R‑1‑C rules: § 18.08.400; § 18.08.410; § 18.08.500; § 18.08.520.
MX‑1 Mixed‑Use (Neighborhood and Highway Zone): § 18.13.020; § 18.13.125; § 18.13.165; § 18.13.170; § 18.13.185.
ADU chapter and ministerial Two‑Unit provisions: § 18.31.070–18.31.080; § 18.31A.050.

If you need the exact ordinance page/URL for any of the cited sections, verify with the Town’s published municipal code or Planning Department (the file search used here is an excerpt of Corte Madera Title 18). Verify with the jurisdiction for parcel‑specific interpretation.

Sources

Retrieved passages

Corte Madera Zoning Code (title will) High relevance
California Building Code (Chapter 18.28) High relevance
CWUIC § 800 (Title 22) High relevance
Corte Madera Zoning Code (§ 3) High relevance
Corte Madera Zoning Code (§ 12) High relevance
Corte Madera Zoning Code (§ 3) High relevance
Corte Madera Zoning Code (Section 65589.5) High relevance
CBC § 12 (section have) High relevance
Corte Madera Zoning Code (Section 18.04.335) Medium relevance
Corte Madera Zoning Code (Chapter 18.20) Medium relevance
Corte Madera Zoning Code (Chapter 18.04) Medium relevance
Corte Madera Zoning Code (§ 1) Medium relevance
Corte Madera Zoning Code (§ 1) Medium relevance
Corte Madera Zoning Code (§ 3) Medium relevance
Corte Madera Zoning Code (Section 18.18.405) Medium relevance

Cited sections

Official Corte Madera code library

Frequently asked questions

What is a variance in Corte Madera and who grants it?

A variance is a discretionary authorization to relax specific zoning rules (setbacks, height, lot width, parking, signs, etc.) when strict application would cause practical difficulties due to property‑specific circumstances. The Planning Commission or Zoning Administrator may grant variances; the Zoning Administrator can refer controversial applications to the Planning Commission. § 18.28.010; § 18.28.040

What findings does the Town require to approve a variance?

The Town requires five general findings: (A) special circumstances of the property, (B) strict application causes practical difficulty/unnecessary hardship, (C) not a grant of special privileges, (D) not detrimental to public welfare or injurious to nearby property, and (E) consistent with the Title and General Plan. Parking/loading variances require additional findings about traffic, on‑street parking, and safety. § 18.28.060

Can a variance authorize a use that the zone doesn't permit?

No. Corte Madera explicitly states a variance may not authorize a use that is not expressly permitted (or conditionally permitted) by the zone. § 18.28.010

How long does a variance approval last?

A variance lapses one year after it becomes effective unless construction has commenced with a building permit or a certificate of occupancy is issued; a one‑year renewal may be possible in limited cases. § 18.28.080

Are there special rules for parking variances?

Yes — parking or loading variances require additional findings that the use does not reasonably require strict enforcement of the parking regulation, will not result in on‑street parking that interferes with traffic, and will not create safety hazards. § 18.28.060(2)

Can I get a front‑setback reduction for an ADU without a variance?

Possibly. Corte Madera’s ADU chapter contains ministerial/ADU‑specific standards; the Town will reduce front yard setback where otherwise necessary to avoid physically precluding an 800‑sq‑ft ADU. For ADU specifics consult the ADU chapter before seeking a discretionary variance. § 18.31.080; § 18.31A.050

Does an overlay district make a variance unnecessary?

Sometimes. Chapter 18.18 (Special Purpose Overlay Districts) may authorize variations of site development standards as part of overlay procedures; where the overlay grants that authority, a separate variance may not be required. Check the applicable overlay language. § 18.28.020

What notices and appeal rights are associated with a variance decision?

Notice must be mailed as prescribed in the Administration chapter; a variance becomes effective ten days after being granted unless appealed or called up under the Appeals chapter. The Planning Commission holds hearings for the variances it considers; the Zoning Administrator must mail notice at least ten days before a decision. § 18.28.050; § 18.28.070; Chapter 18.34

Will a variance automatically trigger design review?

Not automatically — but many projects seeking dimensional relief (height, coverage, upper‑story setbacks, landscaping changes) will still be subject to the Town’s design review standards in Chapter 18.30. If design review is required, the Planning Commission’s findings for design review must also be satisfied. Verify the procedural triggers with Planning staff. (Design Review reference: Chapter 18.30; design review cross‑references in district sections.) Not all cross‑references found in retrieved materials; verify with the jurisdiction.

If the Zoning Administrator denies a variance, can I appeal?

Yes — decisions can be appealed under the Town’s Appeals chapter (Chapter 18.34). The Town Council can review the record and make findings for approval on appeal. § 18.36; § 18.34

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