Local zoning · Los Altos Hills

Los Altos Hills — Signage

Q: What does the Los Altos Hills code say about signs on wireless facilities?

The wireless facilities article specifically states no signs or advertising devices other than certification, warning or other signage required by law is permitted for those facilities ( § 10‑1.1308(d)(1) ) and requires that required notices and an emergency contact sign be posted per permit conditions ( § 10‑1.1310(j) ) .

Q: Are there district‑specific sign standards I should follow (R‑A vs OSR)?

The Town has only R‑A and OSR districts by ordinance ( § 10‑1.301 ); however, no district‑specific numeric sign standards were found in the retrieved materials. Sign location will be subject to setback/height/coverage rules in Article 5 and any Site Development/Design Review conditions § 10‑1.301; § 10‑1.704 .

Q: Does the Town treat signs attached to poles or small structures differently?

The code's wireless section defines building‑mounted and mentions "freestanding sign" inside that definition, which creates interpretive risk; the Town may treat attachments to poles or other structures on a case‑by‑case basis. Request staff interpretation under § 10‑1.1302 if your sign attaches to non‑building structures .

Signage under the Los Altos Hills local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

Los Altos Hills does not maintain a standalone municipal sign chapter in the portions of the zoning code retrieved; signage-specific controls appear only in narrow contexts (for example, wireless telecommunications facilities). For general questions about land use and where signage rules would normally live, consult the Town overview and the Town's zoning code; see the Los Altos Hills zoning & planning overview and the Town's Zoning map and district rules for context. The code establishes only two use districts—Residential‑Agricultural (R‑A) and Open Space Reserve (OSR)—so any sign policy would be applied within that limited district structure (see § 10‑1.301) .

Important: everything below is grounded in the Los Altos Hills Municipal Code excerpts provided. Where the ordinance text does not specify sign size, area, illumination, or permit thresholds, the page notes that explicitly as "Not found in retrieved materials" and recommends verifying with the Town.

What the code actually says about "signs" (short answer)

There is no general, townwide sign ordinance or sign schedule found in the retrieved zoning code files. Not found in retrieved materials.
A narrow prohibition/limit tied to wireless telecommunications facilities states: "No signs or advertising devices other than certification, warning or other signage required by law is permitted." That requirement is in § 10‑1.1308(d)(1) and applies to wireless facility installations outside the public right‑of‑way (and the wireless facility article generally) .
The code also requires that certain required notices and emergency contact signs be posted for wireless/telecom facilities as part of permit conditions § 10‑1.1310(j) .
The code defines terms used in the wireless article and, notably, defines building‑mounted in a way that references other structures (including a "freestanding sign") under § 10‑1.1302, which creates interpretation risk for signage that is attached to other structures .
General nonconforming‑use rules that would affect legacy signs are present (repairs/maintenance, discontinuance) in §§ 10‑1.403–10‑1.406 .

Because the ordinance does not include numeric sign standards (square footage, height, setback, illumination allowances) in the retrieved materials, applicants should treat signage as governed by case‑by‑case site development, design review, or specific permit conditions until the Town provides an explicit sign chapter. Verify with the jurisdiction.

District-by-district breakdown (where signage language appears or might be applied)

Note: The Town's zoning structure contains only two established districts; there are no district‑by‑district sign tables in the retrieved materials. The descriptions below synthesize each district's purpose and point to where development standards live; any sign proposal would be evaluated under the district standards, the Site Development/Design Review process, and special articles such as the wireless article when applicable.

Residential‑Agricultural (R‑A)

Purpose / typical uses: The R‑A district is intended for low density, rural residential and agricultural uses; primary/ accessory/conditional uses are listed in the R‑A article (e.g., § 10‑1.701 et seq.) .
Where it applies: The R‑A zone is the default residential district established by the Town zoning map (§ 10‑1.301) .
Key dimensional references that control overall site development (thus influencing signage placement/visibility): setback, height and coverage limitations are handled by Article 5; R‑A specific cross‑references appear in § 10‑1.704 (see Article 5) .
Sign specifics: No dedicated R‑A signage standards found in the retrieved materials. Sign proposals on R‑A lots would be judged under general site development and design criteria (e.g., neighborhood compatibility, ridgeline/view protections) — see Design Review and Development Standards for process and objective criteria. Not found in retrieved materials for numeric sign limits.

Open Space Reserve (OSR)

Purpose / typical uses: The OSR district is for open space, forest preserve, and agricultural/open space uses (see § 10‑1.801) .
Where it applies: OSR parcels are mapped on the Town zoning map; accessory structures are limited and fences/plantings are subject to Article 5 height limits (§ 10‑1.802) .
Sign specifics: No general OSR signage standards found in the retrieved materials. Any sign in OSR would be judged under the permitted accessory structure rules, Article 5 and any site development permit conditions. Not found in retrieved materials for numeric sign limits.

Most decision‑relevant standards and uses (quick table)

What a reviewer most needs to know	Short guidance	Code Reference
Town districts (where sign rules would be applied)	Only Residential‑Agricultural (R‑A) and Open Space Reserve (OSR) districts are established in the zoning code; sign rules would be interpreted within these districts and the Site Development process	§ 10‑1.301
Wireless facility signage prohibition	Wireless facilities: No signs or advertising devices other than certification, warning or other signage required by law is permitted. This is a categorical limit for telecom installations	§ 10‑1.1308(d)(1)
Required contractor/emergency signs for telecom	Permit conditions require posting of FCC/CPUC notices and an emergency contact sign per permit	§ 10‑1.1310(j)
Definitions that affect interpretation	Building‑mounted is defined in § 10‑1.1302 and explicitly references other structures (including a freestanding sign), so what "building‑mounted" means for a sign may be ambiguous locally	§ 10‑1.1302
District dimensional controls that indirectly affect signs	Height, setbacks, lot coverage limits are in Article 5 and applied to R‑A/OSR via § 10‑1.704 and § 10‑1.803 — these control where a sign structure could be physically located	§ 10‑1.704; Art. 5 cross‑refs
Nonconforming (existing) signs	Nonconforming uses/structures rules (maintenance, repair, discontinuance) apply to legacy signs	§§ 10‑1.403–10‑1.406

Practical guidance & interpretation (plain‑English synthesis)

If you are proposing a standard residential address, nameplate, or non‑commercial sign on a private R‑A lot, the zoning code does not give a numeric allowance or explicit prohibition in the retrieved materials; expect review under the Site Development/Design Review criteria and the Article 5 development standards (setbacks/height/coverage). Verify with the Town because no numeric sign rules were found in the retrieved materials.
If the sign is part of a wireless telecommunications installation (on a pole, monopine, or attached to telecom equipment), the code explicitly restricts advertising signage — only certification/warning/required legal signage is allowed (§ 10‑1.1308(d)(1)) and permit conditions will require emergency contact signage (§ 10‑1.1310(j)) .
Because the code defines building‑mounted in the wireless article in a way that mentions freestanding signs, placement/attachment of signage to non‑building structures could be interpreted inconsistently; ask staff to confirm whether your sign is treated as building‑mounted or freestanding (§ 10‑1.1302) .
For numeric construction/attachment safety standards (wind, structural anchorage, illumination safety, etc.), follow the California Building Standards Code; see the California Building Standards Code reference for construction/attachment requirements (building code rules are outside the zoning title and were not adopted as sign‑specific municipal rules in the retrieved zoning excerpts) .

(First time the page mentions review processes and technical site standards it links to relevant town pages: Los Altos Hills Zoning, Development Standards, Design Review, Overlay Districts, Parking, ADUs, and California Building Standards Code.)

Checklist (what an applicant must satisfy or confirm)

Confirm whether the Town maintains separate sign regulations (not found in retrieved materials); ask Community Development staff for the current sign policy. Verify with the jurisdiction.
Determine which district the parcel is in: R‑A or OSR (§ 10‑1.301) .
Confirm applicable setback/height/coverage limits from Article 5 and the district cross‑references (these govern where a sign structure may sit) § 10‑1.704 (R‑A) .
If the sign is attached to or part of a telecommunications installation, comply with § 10‑1.1308 and § 10‑1.1310 (sign content limited; required postings) .
Prepare site and elevation drawings showing sign size, location relative to setbacks, and materials; anticipate Design Review and Site Development review where required (see the Town's Design Review and Development Standards).
For illuminated or structural signs, obtain building permits and follow the California Building Standards Code for construction/electrical standards (see the California Building Standards Code page) .
Check whether a variance or conditional development permit is needed (if sign encroaches into setbacks, exceeds height, or alters a protected view/ridgeline) and prepare findings per Article 10 if pursuing a variance § 10‑1.1007 .

Risks & Ambiguities

Issue	Why it matters	What to verify
No townwide, numeric sign standards located in retrieved files	Applicant cannot rely on a clear square‑foot, height, or illumination allowance — review will be discretionary	Ask Community Development for any separate sign policy or post‑1986 ordinances; request written guidance. Not found in retrieved materials.
Wireless article sign prohibition vs. normal signs	Telecom permits explicitly prohibit advertising signage; conflict could arise if a sign serves both wayfinding and advertising purposes	If your sign is on/near wireless equipment, confirm applicability of § 10‑1.1308(d)(1) to your proposal
Definition ambiguity — "building‑mounted" mentions freestanding sign	Could affect how staff classifies signs on non‑building structures (e.g., mailbox kiosks, pole signs)	Request written interpretation from Planning Director; include citation § 10‑1.1302
Nonconforming sign treatment	Existing signs may be maintained but reconstruction/alteration rules could limit enlarging or changing a legacy sign	Check §§ 10‑1.403–10‑1.406 for repair/discontinuance rules and confirm if the existing sign is legal nonconforming
Site‑specific scenic/view protections	Signs that alter ridgeline or view character may trigger design or conditional review (subjective findings)	Expect Design Review; consult Design Review and the ridgeline/view siting standards in Article 7/Article 5. Verify with planning staff.

Plain‑English summary

Los Altos Hills' zoning code excerpts provided do not contain a townwide sign ordinance or numeric sign standards; signs are therefore evaluated through existing district development standards and discretionary site/design review, except that wireless telecom installations are explicitly limited to required/legal signage only (§ 10‑1.1308(d)(1)) and must post permit‑required notices (§ 10‑1.1310(j)) . Verify with the Planning Department before ordering fabrication or installation.

Source References

Town of Los Altos Hills Zoning and Site Development (Los Altos Hills Municipal Code, excerpts downloaded from ecode360): reference to districts § 10‑1.301 and district articles § 10‑1.701 et seq.; wireless article § 10‑1.1302–§ 10‑1.1314; sign‑related language § 10‑1.1308(d)(1); posting requirement § 10‑1.1310(j); nonconforming uses §§ 10‑1.403–10‑1.406. See the Town code at https://ecode360.com/LO4964 (download/print date visible in the retrieved files) and the code excerpts provided above (LosAltosHills_ZoningCode.md).
California Building Standards Code (for construction/illumination/electrical standards that apply to sign structures and attachments; building code Appendix H governs structural/attachment criteria): California Building Standards Code (Title 24) — see the California Building Standards Code reference/appendix in the provided materials.

Information Gaps

No townwide sign chapter, numerical sign area/height allowances, temporary sign rules, or permit threshold language were found in the retrieved zoning code. Not found in retrieved materials.
No explicit rules for commercial leasing signs, billboard/pole signs, or political signs were found. Not found in retrieved materials.
The process for minor, ministerial sign permits (if any) is not described in the retrieved excerpts. Not found in retrieved materials.

Sources

Retrieved passages

Los Altos Hills Zoning Code (§ 1) Medium relevance
Los Altos Hills Zoning Code (§ 10-2.1305.1) Medium relevance
Los Altos Hills Zoning Code (§ 10-2.1310.) Medium relevance
Los Altos Hills Zoning Code (Section 1.6100) Medium relevance
Los Altos Hills Zoning Code (Section 66499.37) Medium relevance
Los Altos Hills Zoning Code (§ 10-1.1007) Medium relevance
CBC § 1138A.4 (Section 1138A.4) Medium relevance
Los Altos Hills Zoning Code (§ 10-1.1304) Medium relevance
CEC § H103 (SECTION H103) Medium relevance
CBC § H101 (SECTION H101) Medium relevance
CBC § H103 (SECTION H103) Medium relevance
CBC § H113 (SECTION H113) Medium relevance
Los Altos Hills Zoning Code (Article 10) Medium relevance
Los Altos Hills Zoning Code (§ 10-1.1307) Medium relevance
Los Altos Hills Zoning Code (§ 10-1.1305) Medium relevance
Los Altos Hills Zoning Code (§ 10-2.1314.) Medium relevance

Cited sections

Official Los Altos Hills code library

Frequently asked questions

Do I need a sign permit in Los Altos Hills?

Los Altos Hills' retrieved zoning code does not include a general sign permit schedule or numeric permit thresholds; the code treats development through site development/design review procedures and district standards, so whether a separate sign permit is needed must be confirmed with the Planning Department. Not found in retrieved materials; verify with the jurisdiction.

What does the Los Altos Hills code say about signs on wireless facilities?

The wireless facilities article specifically states no signs or advertising devices other than certification, warning or other signage required by law is permitted for those facilities (§ 10‑1.1308(d)(1)) and requires that required notices and an emergency contact sign be posted per permit conditions (§ 10‑1.1310(j)) .

Are there district‑specific sign standards I should follow (R‑A vs OSR)?

The Town has only R‑A and OSR districts by ordinance (§ 10‑1.301); however, no district‑specific numeric sign standards were found in the retrieved materials. Sign location will be subject to setback/height/coverage rules in Article 5 and any Site Development/Design Review conditions § 10‑1.301; § 10‑1.704 .

Can I install an illuminated or electric sign?

Structural/electrical safety and illumination standards are regulated by the California Building Standards Code (Title 24). The zoning excerpts do not set out illumination allowances or prohibitions for signs; follow building permit requirements and consult the Town for allowable illumination under local design policies. See California Building Standards Code for construction/safety rules; local permit requirements not found in retrieved materials .

What if I already have a sign that doesn't match current rules?

Nonconforming use/structure provisions in the code allow maintenance and limited repair of legal nonconforming structures, but substantial structural changes or changes of use may be limited — see §§ 10‑1.403–10‑1.406 for discontinuance and repair rules. If the sign is nonconforming, verify allowable repairs or required removal with staff .

Who enforces sign rules and who should I ask for an interpretation?

The Town's Zoning Administrator and Community Development (Planning) staff administer zoning and permit matters. Ask the Planning Director or Zoning Administrator for a written interpretation of how your proposed sign is classified (e.g., building‑mounted vs. freestanding) — the wireless article's definitions (e.g., § 10‑1.1302) create possible ambiguity for attachments to non‑building structures .

If my sign needs to encroach into a setback or be taller than allowed, can I get an exception?

The code authorizes variances and sets findings and procedures in Article 10; the Staff Committee or Planning Commission grants variances following the standards in § 10‑1.1007. Expect discretionary review; provide findings that show practical difficulties and that intent of the ordinance is preserved if seeking a variance .

Does the Town treat signs attached to poles or small structures differently?

The code's wireless section defines building‑mounted and mentions "freestanding sign" inside that definition, which creates interpretive risk; the Town may treat attachments to poles or other structures on a case‑by‑case basis. Request staff interpretation under § 10‑1.1302 if your sign attaches to non‑building structures .

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