Commercial Real Estate in Walnut Grove: Walnut Grove SPA, Historic Preservation and Delta Rules

By Matthew Martinez, Founder, CEO & Managing Broker, Diamond Real Estate Group. California DRE #01869679.

Walnut Grove is a small, historic Sacramento River town in the Delta, and its commercial property is mostly older storefronts, shop buildings and small industrial and warehouse sites tied to farming. It is unincorporated, so Sacramento County zones it through a dedicated Special Planning Area, and it sits in the Delta’s Primary Zone, where state Delta policy shapes what the County approves. Confirm the sub-area, any historic status and flood and levee constraints for each parcel with County Planning.

Who controls the parcel

Walnut Grove has no city government. The Walnut Grove Special Planning Area in the Sacramento County Zoning Code sets uses and standards, on top of countywide zoning. The first edition dates to 1981. A joint Walnut Grove and Locke edition followed on December 3, 1997, and the current third edition was adopted January 12, 2005 and amended March 1, 2017. The original ordinance’s effective date, March 10, 1983, remains the baseline for judging existing uses, lots and signs.

Walnut Grove is also inside the Delta Primary Zone. The County’s Delta Protection Element, adopted May 28, 2014 and amended September 26, 2017, is adapted from the Delta Protection Commission’s Land Use and Resource Management Plan. General plan amendments affecting the Primary Zone are reviewed for consistency with that plan (DP-5). Nearby Locke and Courtland have their own SPAs; see our Courtland guide.

Walnut Grove zoning for commercial, industrial and mixed use

The SPA’s permitted-use table divides the town into four sub-areas, mapped on Exhibit 504-38.

Prohibited in the SPA. Psychiatric facilities, sanitariums, social rehabilitation centers, massage parlors, tattoo shops and adult theaters and bookstores.

Tasting rooms, breweries, lodging and events

Walnut Grove’s code is friendlier to wine and beer than many river towns:

• Tasting rooms. Off-site tasting rooms can be a building’s primary use in the Commercial-Residential sub-area. They may host events with no cap on size or frequency.
• Event hours. Outdoor activity runs from 8 a.m. to 7 p.m. Sunday through Thursday, and to 11 p.m. on Fridays, Saturdays and holidays. The County Noise Ordinance also applies.
• Production. Small wineries and craft breweries need a use permit in Commercial-Residential. Larger wineries and breweries fit the Industrial and Office-Warehouse sub-areas.
• Lodging. Bed and breakfast inns are allowed by right in Commercial-Residential. Vacation rentals of homes, duplexes and guest houses need a Vacation Rental Permit in the Residential and Commercial-Residential sub-areas.

The County’s short-term rental page says short-term rental can be a property’s primary use only in qualifying zones of the Locke SPA, the Courtland SPA and Walnut Grove (which the page calls an NPA). Everywhere else in the unincorporated County it must stay accessory to a lived-in home. Guests pay the County’s 12% transient occupancy tax plus tourism district assessments.

Historic preservation, design and signs

Historical Preservation Areas. Properties on the National or California Register, shown on Exhibit 504-38, form the SPA’s Historical Preservation Areas.

• Design review. Exterior work there goes through Planning Director review, with applications reviewed by the Walnut Grove Homeowners and Merchants Association and the Sacramento River Delta Historical Society.
• Standards. The design criteria cover style, height, bulk, materials and color, and point to the Secretary of the Interior’s standards. Historic colors such as natural wood, ivory, off-white, light brown and tan are expected; others need historical evidence.
• Size. New buildings and additions must match existing setbacks and heights.

Demolition. Demolishing a building in a Historical Preservation Area needs Planning Director approval and referral to the Delta Citizens Municipal Advisory Council and the historical society. The structure must be documented before a permit issues, and salvage is encouraged.

Signs. Pole signs are prohibited. Signs must be flat or projecting, below the roofline and in keeping with the historic setting. Sign area is capped at 20 square feet per building in Historical Preservation Areas, and window signs at 25% of the glass or six square feet, whichever is greater.

Parking. County parking standards are a guide only, and lesser standards may be approved. Off-site parking needs a recorded agreement, and the SPA encourages owners to form parking associations, which helps older storefronts with no lots.

Delta Primary Zone policies

The Delta Protection Element names Walnut Grove as one of the towns where new non-farm housing should go (DP-4). It treats agriculture and agriculture-supporting commercial and industrial uses as the primary uses of the Primary Zone (DP-2). Other policies that affect a commercial buyer:

• Farm buffers. New non-agricultural projects must provide buffers from adjacent farmland (DP-3).
• Levees. New structures must be set back from levees and future levee expansion areas (DP-7). The County supports raising town levees to 200-year protection (DP-53).
• Recreation and tourism. The element encourages private water-oriented recreation, agricultural tourism and heritage tourism (DP-24, DP-32, DP-36). It also recommends restrooms and pump-outs at marinas (DP-42).

Transfer tax, business tax and property tax

Walnut Grove pays the County documentary transfer tax of $0.55 per $500, per the Clerk-Recorder, with no city tax added. A County General Business License is required for businesses located in the unincorporated area (Department of Finance), and tasting rooms also need state alcohol licensing. A change of ownership generally triggers Proposition 13 reassessment.

Due diligence that matters in Walnut Grove

Start with our commercial due diligence checklist, then add:

• Identify the SPA sub-area on Exhibit 504-38 and confirm the use is listed there.
• Check whether the building is in a Historical Preservation Area; plan for review of any exterior change and for demolition limits.
• Confirm flood zone, levee setbacks and the responsible reclamation district.
• Confirm water and wastewater service; Delta policy limits new sewage facilities in the Primary Zone.
• Verify the existing use and signs against the March 10, 1983 baseline if they predate the SPA.
• For events or tasting, confirm use permit terms and outdoor hours.

Questions people ask

Sources & notes

1. Sacramento County, Walnut Grove SPA
2. Sacramento County General Plan, Delta Protection Element
3. County Planning, short-term rental permits
4. Sacramento County, About Special Planning Areas
5. County Clerk-Recorder, documentary transfer tax
6. County Department of Finance, business license FAQ

Note: The SPA text we reviewed does not describe its boundaries or the sub-area map in words, and does not address flood management. The County’s STR page refers to a "Walnut Grove NPA" while the Zoning Code library lists a Walnut Grove SPA; confirm which governs a given parcel.

This page is general information, not legal or tax advice. Last reviewed October 2026 by Matthew Martinez.

Related: Walnut Grove real estate guide · Multifamily property in Walnut Grove · Commercial real estate services