Parcel is identified as an Eichler home in the City GIS.

Typically R-1 single-family residential. Verify current parcel zoning with City GIS.

If CombiningDistrict = S, the Single Story overlay is active. Verify with City GIS.

If Heritage flag is active, additional Heritage Resource District review may apply.

When CombiningDistrict = S, vertical expansion to a second story requires separate current zoning review. The S flag takes precedence over design-guideline discussion of second-story design.

Do not interpret the absence of an S flag as approval for a second story. Current zoning, FAR, design review, and permit requirements still apply.

The 2009 Eichler Design Guidelines identify review triggers including new construction, floor-area increases of 20% or more, any second-story component, homes exceeding FAR thresholds, and exterior modifications significantly changing appearance.

Verify current design review requirements with the City of Sunnyvale. The 2009 guideline language does not override current zoning or permit procedures.

Eichler homes are characteristically single-story. Maintaining the one-story profile is the primary design-guideline recommendation.

If CombiningDistrict = S, a second-story addition requires separate current zoning analysis before any design-guideline review.

Strong horizontal character is a defining Eichler trait. Additions and modifications should reinforce, not interrupt, the horizontal reading of the structure.

3:12 maximum is the general Eichler guideline approach, except in neighborhoods where original Eichler homes use steeper pitches.

Hip roofs conflict with the design-guideline recommendation. Avoid on new construction or additions.

Retain or repeat wide Eichler roof overhangs. A defining characteristic of the original architecture.

Retain or repeat exposed post-and-beam construction at roofline. Original structural expression.

For Heritage Resource District properties, maintain the original roof pitch.

Rear or side additions are preferred. Front additions that significantly affect original architectural features require review.

If a front addition significantly affects original architectural features, design review is called for.

Flat roof on addition is consistent with Eichler design guidelines.

A steep-pitched roof on an addition requires contextual design review.

New work should appear compatible with the original Eichler structure in materials, scale, and character.

The 2009 guidelines identify a floor-area increase of 20% or more as a design review trigger. Verify current requirements with the City.

If CombiningDistrict = S, a second story requires separate current zoning analysis. The S flag takes precedence over design-guideline discussion.

Absence of the S combining district flag does not constitute approval. Current zoning, FAR, design review, and permit requirements still apply.

3:12 maximum is the preferred guideline approach for second-floor gables.

Side and rear second-floor balconies conflict with the design-guideline recommendation.

Bay windows on a second-story addition conflict with the design-guideline recommendation.

Large windows beyond emergency-egress requirements are strongly discouraged on second-story side and rear elevations.

Clerestory windows, frosted glass, textured glass, and reduced side/rear glazing are preferred privacy strategies for second-story additions.

Low-profile atrium covers with flat or shallow roofs are consistent with the design guidelines.

Post-and-beam atrium cover construction is consistent with original Eichler character.

Large glazing in an atrium cover is consistent with Eichler design character.

Building-code egress requirements may affect whether an atrium can be covered. Verify with current building code before proceeding.

Building-code egress requirements may affect whether an atrium can be covered.

For Heritage Resource District properties, atrium enclosures should not be obviously visible from a public way.

Simple rectangular windows are consistent with Eichler design character.

Triangular gable or eave windows are an original Eichler feature and are compatible with the design guidelines.

Arched windows conflict with the design-guideline recommendation.

Odd-shaped windows not commonly found on original Eichlers conflict with the design-guideline recommendation.

Bay windows on street-visible elevations conflict with the design-guideline recommendation.

Double-hung windows on street-visible elevations conflict with the design-guideline recommendation.

Divided-light windows and snap-in grids on street-visible elevations conflict with the design-guideline recommendation.

Projecting garden windows on street-visible elevations conflict with the design-guideline recommendation.

Fixed, sliding, or casement windows with narrow frames are consistent with Eichler design character.

Vertical-grooved wood siding (Lauan and similar) is the original and preferred Eichler exterior material.

Repairing or replacing siding to match the original material and profile is consistent with the design guidelines.

Rough or irregular stone siding conflicts with the design-guideline recommendation.

Saw-tooth clapboard siding conflicts with the design-guideline recommendation.

Simple cement plaster, brick, smooth real stone, shingles, or horizontal-grooved wood may be compatible where appropriate per the 2009 guidelines.

Original recessed entry is a defining Eichler feature. Preserve where present.

Simple flush wood entry doors are consistent with Eichler design character.

Elaborate entry treatments that create a focal element rising above the roof eave conflict with the design-guideline recommendation.

Simple garage doors, or garage doors faced with compatible vertical-grooved siding, are consistent with the design guidelines.

The 2009 guideline identifies Planning Division permit requirements for fences over 3 feet. Verify current requirements before relying on this threshold.

Verify current permit requirements with the City of Sunnyvale. The 2009 guideline threshold may not reflect current code.

The 2009 guideline identifies a 15-foot setback from the front property line for fences 6 feet or higher. Verify current requirements.

Verify current setback requirements with the City of Sunnyvale.

Simple modern fence designs are consistent with Eichler design character.

Original Eichler fencing is a historically characteristic feature.

Preserve mature landscaping wherever possible. Mature trees and plantings contribute to the character of Eichler neighborhoods.

Radiant floor heating is the original Eichler heating system. Maintaining or restoring it is consistent with the archival character of the home.

Concealed supply ducts are consistent with the design guidelines.

Ductless mini-split, room heat pump, and small-duct central systems are compatible options per the 2009 guidelines.

Roof-mounted equipment requires visual review. Where unavoidable, mitigate visual impact by painting to match the roof or house.

The 2009 design guideline calls for integrating rooftop solar into the architectural design. State law may limit the City's ability to regulate rooftop solar. Verify current requirements.

State law may limit the City's ability to regulate rooftop solar. Verify current requirements with the City of Sunnyvale.

One-story new construction is consistent with the Eichler design guidelines.

Two-story new construction requires contextual design review. The 2009 guidelines identify specific design concepts including maximum 10-foot floor-to-floor height, 3-foot second-floor overhangs, one-story elements forward of two-story walls, and horizontal projecting bands.

New construction should use modernist design with rectangular floor plans, horizontal emphasis, flat or low-pitched roofs, wide overhangs, and post-and-beam construction.

Bay windows on primary street-facing facades conflict with the design-guideline recommendation for new construction.

For Heritage Resource District properties, maintain the one-story character where applicable.

Original entryways and carports should not be enclosed on Heritage Resource District properties.

Preserve eaves, rafters, trellises, front windows, masonry, and other defining architectural features on Heritage Resource District properties.

Alterations to Heritage Resource District properties should use identical or closely resembling original materials.

Major additions or material changes to Heritage Resource District properties may require a Resource Alteration Permit. Verify the property's current designation and permit pathway with the City.

Not every alteration automatically requires a Resource Alteration Permit. Verify the property's current designation and permit pathway with the City of Sunnyvale.