Multifamily and Duplex Properties for Sale in Redwood Valley: Zoning and Rent Rules

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What multifamily in Redwood Valley looks like

Redwood Valley is a rural community of farms, vineyards and 5- to 10-acre ranchettes, with some clusters of smaller lots, according to the County’s General Plan Chapter 6. Rental property is usually a home with an ADU, a duplex or a few units on a larger lot, mobile homes on acreage, or housing near the East Road and School Way downtown. Most purchases fit 2-4 unit financing; for anything larger, see apartment building loans.

Two facts shape every deal. Water comes from a district with a history of supply limits, and there is no public sewer, so each property depends on its own septic system.

Where the zoning allows it

Redwood Valley is unincorporated, so the County’s Inland Zoning Code applies. Density depends on utility service, and most town parcels have water from the Redwood Valley County Water District but no sewer.

County district	What it is for	Multifamily with water but no sewer
R-C Rural Community (Ch. 20.084)	Mixed town uses	Two-family and multifamily by administrative permit; 1 unit per 12,000 sq ft
C-1 Limited Commercial (Ch. 20.088)	Local commerce with housing	Two-family and multifamily permitted; 1 unit per 12,000 sq ft
C-2 General Commercial (Ch. 20.092)	Downtown commerce with housing above	Same density; 50 ft height
R-2 / R-3 Residential (Ch. 20.076, 20.080)	Duplex and multiple-family districts	Confirm density with Planning
A-G Agricultural (Ch. 20.052)	Farms and vineyards	One home per parcel; clusters at 1 per 40 acres; employee housing permitted
Outside the water district	Rural land	C-1 and C-2 bar two-family and multifamily; 40,000 sq ft per home

Sources: R-C, C-1, C-2, A-G. Parcel-level zoning was not verified; order a County Letter of Zoning.

General Plan policy CP-RV-5 encourages a mixed retail and residential project at the northwest corner of East Road and School Way, and the Redwood Valley goals call for avoiding incremental increases in rural residential density. New units belong near downtown, not on outlying ranchettes.

ADUs. The County’s ADU page allows detached ADUs up to 1,200 square feet and JADUs up to 500. JADUs need an owner living on site; ADUs do not. An ADU cannot go on a leach field or its replacement area, and new ADUs need solar panels. See our ADU investment guide.

SB 9. Redwood Valley parcels may not meet the state’s urban-area test for lot splits; confirm with Planning. Our SB 9 guide explains the tests.

Rent rules: state law only

No Mendocino County jurisdiction appears on the Attorney General’s chart of local rent ordinances (updated July 16, 2026). AB 1482’s statewide caps apply to covered units: 7.7% for increases starting August 1, 2025 and 8.6% for increases starting August 1, 2026 through July 31, 2027, with just cause protections after the tenancy qualifies. Read our AB 1482 guide and just cause eviction guide.

Redwood Valley rental property rules

We found no Redwood Valley rental registration or inspection program. What applies:

Water billing. The water district is now part of the Ukiah Valley Water Authority, per the City of Ukiah’s UVWA page. Redwood Valley accounts moved to the City’s billing system with new account numbers, and the old district office stopped taking payments January 1, 2025. When you buy, transfer each meter through City utility customer service and decide whether the owner or tenant pays.
Rate changes. UVWA became responsible for rates and fees January 1, 2025 and issued a release in December 2025 on proposed rate adjustments after a regional rate study. Build current rates into your budget, not the seller’s old bills.
Short-term rentals. Stays of 30 days or less owe County transient occupancy tax and a Business Improvement District assessment through the Treasurer-Tax Collector.

Water supply, septic and fire

Supply history. LAFCo’s 2013 Ukiah Valley review described the district as formed January 16, 1964, serving about 15 square miles and 1,335 connections. Its Lake Mendocino diversion right of up to 4,900 acre-feet applies only when flow at the forks exceeds 72,000 acre-feet, which the review said happens about 70 days in wet years and a day or two in dry ones. At that time the district had a moratorium on new domestic and irrigation connections. UVWA filed a state SAFER grant application in July 2025 for regional integration. We did not verify current connection policy, so ask UVWA in writing before planning any new unit that needs its own meter.

Septic. With no sewer district shown on LAFCo’s special districts list for the valley, every unit depends on septic. The General Plan (CP-RV-8) encourages the water district to pursue sewage treatment, but no system exists today. Septic capacity often caps bedrooms.

Fire. The Redwood Valley-Calpella Fire District covers the valley. Get insurance quotes before removing contingencies. For three or more units with elevated decks, follow SB 721 balcony inspections.

Underwriting a Redwood Valley multifamily purchase

Confirm each unit has a legal water connection through UVWA and check whether added units can be served.
Inspect the septic system and map the leach field.
Verify County permits for every dwelling.
Model rent increases at or below 8.6% for covered units and collect estoppel certificates.
Use current UVWA rates and quoted fire insurance in your expenses.
Run reassessed property taxes through our rental property analysis.

Questions people ask

Is there rent control in Redwood Valley?

No. AB 1482 caps covered units at 8.6% for increases starting August 1, 2026.

Who supplies water now?

The Redwood Valley County Water District, a member of the Ukiah Valley Water Authority run by City of Ukiah staff.

Can I add a unit that needs a new water meter?

Ask UVWA first. A 2013 LAFCo review reported a moratorium on new connections; current policy was not verified.

How dense can apartments be?

With water but no sewer, about 1 unit per 12,000 square feet in R-C, C-1 and C-2.

Can I add an ADU?

Usually, if it stays off the leach field and the septic system can handle it.

Where does the County want new housing?

Near the East Road and School Way downtown, including a mixed-use project at the northwest corner of that intersection.

Sources & notes

General information, not legal or tax advice. Last reviewed October 2026 by Matthew Martinez.

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