Local zoning · Millbrae

Millbrae — Design Review

Q: Where are the land‑use tables that show permitted uses by district?

The land‑use table is in Article IV § 10.05.0410 ; it shows which uses are permitted, conditional, or accessory in the listed zoning districts and is the starting point for determining whether a use is allowed and whether design review, a conditional use permit, or other approvals are needed § 10.05.0410 .

Design Review under the Millbrae local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page summarizes how the City of Millbrae applies design review under Title 10 (Planning and Zoning). It explains when projects go to staff versus the planning commission, what submittals and findings are required, how the Millbrae Station Area Planned Development (MSAPD) and other districts use site development plans, and where to verify development standards such as setbacks, parking, and ADU treatment. For the code text, see the City zoning and planning material adopted in Title 10. For Millbrae's broader context see the city's main zoning & planning overview and the zoning rules referenced below.

Key controlling code: § 10.05.2500 (Design review permits) and related site/precise development plan rules such as § 10.05.1715 and § 10.05.1720; citations below are to those sections in the Millbrae code .

How Millbrae design review works (plain structure)

Every application for construction, alteration, or exterior modification of a building or any other discretionary entitlement is subject to design review under § 10.05.2500; residential projects use the Residential Design Review Guidelines adopted by the planning commission and city council .
Initial review is performed by community development staff; certain project types must be forwarded to the planning commission (triggers are in § 10.05.2500(B)(1)) while other projects receive final action by staff .
Planning‑commission design review is a noticed public hearing with required exhibits and specific findings (appearance in keeping with neighborhood, compliance with development regulations and adopted design guidelines, no significant visual impact to neighboring principal-room views unless no cost-effective alternative exists, and not detrimental to orderly development) — see § 10.05.2500(C)(1–2) .
No building permit is issued until the design review approval is final (staff or commission) and construction plans substantially conform to the approved exhibits and applicable city rules and the California Building Standards Code (Title 24) requirements, per § 10.05.2520(F) .

Note: Millbrae treats signage and many site plans as design-review subjects — see the sign chapter and the master site/precise development plan rules for the Millbrae Station Area (MSAPD) .

District-by-district design-review implications

Below are the principal zoning districts where design review, site plans, or precise development plans interact with specific district standards. Each subsection lists the district purpose, typical permitted uses, key dimensional standards, and where the district commonly applies.

First occurrence of each related topic is linked to the City's published pages: zoning, land use, development standards, parking, overlay districts, signage, ADUs, and California Building Standards Code.

R-1 — Single‑family Residential

Purpose: Stabilize and protect detached single‑family character; correlates with low‑density General Plan designation § 10.05.0600 .
Typical permitted uses: single‑family dwellings, state‑regulated residential care facilities; accessory uses include ADUs and junior ADUs § 10.05.0610 .
Key dimensional standards (high‑level): minimum lot width 50 ft (interior), corner 60 ft; lot area 5,000 sf; lot coverage 50%; FAR 55% — see § 10.05.0620 .
Design review note: residential projects are reviewed under the Residential Design Review Guidelines referenced in § 10.05.2500(A); staff may act or forward to commission depending on thresholds in § 10.05.2500(B)(1) .

R-2 — Duplex/Triplex Residential

Purpose & uses: medium density; permits duplexes/triplexes and similar housing types § 10.05.0700–0710 .
Key dimensional standards: see § 10.05.0720 — includes minimum lot area/width, lot coverage and parking rules; parking cross‑referenced to the city parking table § 10.05.0720(F) .
Design review: exterior renovations and new multi‑unit buildings follow Article XXV procedures; larger/more impacting work is typically sent to the planning commission per § 10.05.2500(B)(1) .

R-3 — Multifamily Residential

Purpose: higher‑density apartment areas § 10.05.0800 .
Uses: multiple‑family dwellings and various conditional uses; accessory uses include ADUs and short‑term rentals § 10.05.0810 .
Key standards: lot widths and areas specified in § 10.05.0820; lot coverage up to 75%, FAR may be unlimited for R‑3 depending on the site and plan (see § text) .
Design review: new buildings and significant exterior alterations are subject to design review and may need planning‑commission review (see Article XXV) .

C — Commercial District

Purpose: general commercial uses; see § 10.05.1000 (purpose) and development standards § 10.05.1020 .
Uses: retail, services; the city's land‑use Table (Article IV) shows what is permitted/conditional in each district § 10.05.0410 .
Key dimensional standards: minimum lot widths as low as 25 ft, lot area 2,500 sf, lot coverage up to 100%, structure height typically up to 40 ft (with exceptions/height exceptions procedures) § 10.05.1020 .
Design review: many commercial signs and significant permanent signs require planning commission design review under the sign chapter § 10.10.150 .

MSAPD — Millbrae Station Area Planned Development (Millbrae Station Area Specific Plan)

Purpose: area‑specific planned development for the station area; implements the Millbrae Station Area Specific Plan (MSASP) § 10.05.1700–1705 .
Uses and design review: any proposed use involving a new structure or exterior alteration within the MSAPD is explicitly subject to the site development plan and design review per Article XXV § 10.05.1710 .
Site development plan content: the MSAPD requires an extensive submittal (site plan, architecture, landscape, engineering, traffic analysis, utilities, signage, and environmental review) in § 10.05.1715 and § 10.05.1720; approvals are by the planning commission with specific findings tied to the MSASP goals .
Design implications: MSAPD projects routinely require public hearings, environmental review, and multi‑discipline studies; smaller single‑family projects within MSAPD may still be captured if they alter exteriors § 10.05.1710 .

PD — Planned Development district

Purpose: flexible zoning (PD) requires conceptual then precise development plans; any new structure or exterior alteration in PD areas is subject to design review and precise plan procedures § 10.05.1500–1550 .
The planning commission reviews precise development plans for architectural and landscape conformity and makes findings similar to site development plan rules § 10.05.1550 .

Decision‑relevant quick table (selected districts)

District	Typical permitted uses	Key decision standards (lot width / area / coverage / height)	Code reference
R-1	Single‑family; ADUs (accessory)	Width 50 ft (interior) / 60 ft (corner); Area 5,000 sf; Lot coverage 50%; FAR 55%	§ 10.05.0610, § 10.05.0620
R-2	Duplex/triplex	See § 10.05.0720 for lot & yard rules; parking per table in § 10.05.2100	§ 10.05.0720
R-3	Multi‑family	Width 50 / 60; Area 5,000 sf; Lot coverage up to 75%; FAR: varies (see text)	§ 10.05.0810, § 10.05.0820
C (Commercial)	Retail, offices, services	Min width 25 ft; lot area 2,500 sf; lot coverage 100%; height up to 40 ft (exceptions apply)	§ 10.05.1000, § 10.05.1020
MSAPD	Mixed‑use, transit‑oriented	Site development plan required; detailed architecture, traffic, utilities, landscape, signage submittals; public hearings	§ 10.05.1700–1715, § 10.05.1720

What applicants must submit — Checklist

Pre‑application / initial intake with community development staff (staff review required) § 10.05.2500(B)
Site plan showing relationship to streets, sidewalks, utilities, ingress/egress, existing/proposed structures, all setbacks and garage/driveway dimensions § 10.05.2500(C)(1)(a)
Architectural plans and elevations (all exterior sides), materials, colors, and at least one perspective § 10.05.2500(C)(1)(b)
Landscape and irrigation plans (plant list, maintenance provisions) § 10.05.2500(C)(1)(c) and related landscaping/screening rules § 10.05.2010
For MSAPD or PD: full site development / precise development plan package (engineering, traffic, utilities, environmental review materials) § 10.05.1715, § 10.05.1545
Soils/geotechnical report if requested § 10.05.2500(C)(1)(d)
Samples of proposed exterior materials and colors § 10.05.2500(C)(1)(e)
Payment of application fees (set by City Council resolution) § 10.05.2500(H) — Verify current fee schedule with Community Development

Practical tips: confirm whether the project meets a planning‑commission trigger (second‑floor additions larger than 500 sf, all new buildings, significant exterior alterations, or any project requiring a conditional use/variance) before preparing full commission‑level exhibits § 10.05.2500(B)(1) .

Risks & Ambiguities

Issue	Why it matters	What to verify
Threshold for “significant exterior alterations”	Staff discretion determines whether planning commission review is required; unclear threshold can change process and timeline	Verify with Community Development what triggers “significant” for your project (code: § 10.05.2500(B)(1)(c))
View impacts and "no viable alternative" test	Design findings prohibit significant visual impact to neighboring principal‑room views unless applicant proves no viable/cost‑effective alternative § 10.05.2500(C)(2)(c) — this is subjective and can require additional studies	Anticipate and prepare view‑impact analyses and alternatives; confirm submittal expectations with staff
Residential Design Review Guidelines (detailed standards)	Code requires adherence but the Guidelines' specifics are outside the zoning text § 10.05.2500(A)	Request the current Residential Design Review Guidelines from the Community Development Department — Not found in retrieved materials
Fees and consultant costs (third‑party reviews)	City may require independent consultant review at applicant's expense (e.g., design consultant, traffic) § 10.05.2500(C)(3) and MSAPD site plan sections	Ask for an estimate of potential consultant review costs and standard deposit amounts — fee schedule not specified in retrieved excerpts (set by council)
Applicability to small ADUs or minor accessory work	The code says every construction/alteration is subject to design review, but minor exceptions exist in practice (staff review, minor exceptions) § 10.05.2500	Verify whether small ADU exterior work is handled administratively (staff) or requires planning commission review for your parcel — Verify with the jurisdiction

Plain‑English summary

If you change how the outside of your Millbrae house or building looks — new building, big addition, or significant exterior change — your project will go through Millbrae design review: staff checks it first and some projects go to a public planning‑commission hearing; you must submit site plans, architecture, landscape, and other technical studies, and the project has to meet the code findings (fit the neighborhood, follow standards and guidelines, avoid major view impacts) before a building permit is issued § 10.05.2500, § 10.05.1715 .

Source References

Design review (procedures, staff vs. commission, submittals, findings): § 10.05.2500 — downloaded from the City of Millbrae code (ecode360) at https://ecode360.com/MI4538.
Effectiveness of approvals and permit tie‑ins to building permits / Title 24: § 10.05.2520(F) .
Planning commission design review submittal list and findings: § 10.05.2500(C)(1–2) .
Planning commission vs. staff triggers (what must go to commission): § 10.05.2500(B)(1) .
MSAPD — Millbrae Station Area Specific Plan requirements, site development plan content and planning commission findings: § 10.05.1700–1715, § 10.05.1720 .
PD / precise development plan requirements (content and review): § 10.05.1545 and § 10.05.1550 .
Residential district rules (R‑1): § 10.05.0600–0620 .
Duplex/triplex (R‑2) development standards: § 10.05.0700–0720 .
Multifamily (R‑3) purpose, uses, development standards: § 10.05.0800–0820 .
Commercial district standards: § 10.05.1000, § 10.05.1020 .
Sign design review rules (signs that require planning‑commission review and standards): § 10.10.150 .
Exceptions, variances and appeal rules relevant to design review outcomes: § 10.05.2530 and Article XXVII / Article XXVIII references (appeals and amendments) .

(These citations are drawn from the Millbrae zoning code material retrieved from ecode360 on the Millbrae Title 10 zoning chapters.)

Sources

Retrieved passages

Millbrae Zoning Code (§ 8606) High relevance
CBC § 10.05.2500 (§ 10.05.2500) High relevance
Millbrae Zoning Code (article establishes) High relevance
Millbrae Zoning Code (chapter shall) High relevance
CBC § 10.05.2500 (§ 10.05.2500) High relevance
Millbrae Zoning Code (§ 10.10.150.) High relevance
Millbrae Zoning Code (§ 10.05.1715.) Medium relevance
Millbrae Zoning Code (§ 8606) Medium relevance
Millbrae Zoning Code (chapter in) Medium relevance
Millbrae Zoning Code (§ 8102) Medium relevance
CBC § 4.20.010 (section for) Medium relevance
Millbrae Zoning Code (Article XVI) Medium relevance
Millbrae Zoning Code (§ 8605) Medium relevance
Millbrae Zoning Code (§ 7906) Medium relevance
Millbrae Zoning Code (§ 10.05.2000) Medium relevance

Cited sections

Official Millbrae code library

Frequently asked questions

Do I always need design review for an ADU in Millbrae?

Not always — the ordinance states that applications for construction, alteration, or exterior modification are subject to design review and that residential review follows the Residential Design Review Guidelines § 10.05.2500(A). However, small or purely interior ADU work may be handled administratively by staff; whether an ADU requires planning‑commission review depends on the scope (e.g., second‑floor additions, exterior changes) and the staff triggers in § 10.05.2500(B)(1). Verify with Community Development for parcel‑specific application of the rule .

What submittals will the planning commission expect for design review?

For planning‑commission level design review, the code requires a site plan, architectural drawings/elevations and perspective, landscape/irrigation plans, soils/geologic reports if requested, and material/color samples § 10.05.2500(C)(1)(a–e). MSAPD or PD projects require expanded engineering, traffic, utilities, and environmental materials as specified in § 10.05.1715 and § 10.05.1545 .

Which projects are automatically forwarded to the planning commission?

Staff shall forward to the planning commission: (a) second‑floor or higher additions except limited small additions under 500 sf to single‑family detached dwellings, (b) all newly proposed buildings, (c) significant exterior alterations as determined by staff, and (d) any application requiring a conditional use, variance, or exception § 10.05.2500(B)(1) .

What findings must planning commission make to approve design review?

The commission must find that the architecture/landscaping/appearance fit neighborhood character; the project complies with development regulations; it complies with adopted design review guidelines and will not cause significant visual impacts to neighboring principal‑room views unless no viable alternative exists; and it is not detrimental to orderly and harmonious development § 10.05.2500(C)(2) .

Does design review approval expire?

Yes — planning commission approvals are effective for one year from the date of approval (or up to three years if designated by the commission) unless extended; the commission may extend approvals per § 10.05.2520(D). Also, approvals are not final until the 10‑day appeal period has elapsed or appeals resolved § 10.05.2520(E) .

If my project is in the Millbrae Station Area (MSAPD), what extra steps are required?

MSAPD projects require a site development plan that refines the MSASP concept and a host of exhibits (site plan, architectural drawings, landscape, engineering, traffic and utilities analyses, environmental review materials). The planning commission makes MSASP‑specific findings tying the project to MSASP goals § 10.05.1715–1720 .

Are sign permits covered by design review?

Yes — many permanent signs and certain illuminated awnings require planning commission design review; smaller signs (50 sf or less) may be administratively approved by the community development department, but exceptions exist § 10.10.150 .

Can design review conditions be appealed or modified later?

Decisions are appealable to the city council per the appeals process (Article XXVII); modification of precise development plans or site development plans is possible — minor technical changes may be made by the director, while major changes go back to the planning commission § 10.05.1555–1560, § 10.05.2500(E) .

Where are the land‑use tables that show permitted uses by district?

The land‑use table is in Article IV § 10.05.0410; it shows which uses are permitted, conditional, or accessory in the listed zoning districts and is the starting point for determining whether a use is allowed and whether design review, a conditional use permit, or other approvals are needed § 10.05.0410 .

What if staff asks for a consultant review (e.g., design consultant or traffic)?

The code allows the city to require independent technical review at the applicant’s expense (MSAPD and Article XXV materials reference such consultant reviews); the applicant pays those costs — be prepared for possible consultant fees and deposit requirements § 10.05.1715, § 10.05.2500(C)(3) .

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