A 113-acre LEA-zoned ranch in the Petaluma West dairy belt, off-market since December 2025. Owned since 2001 by Robert L. Hanson and Michael Agins (Bloomfield Farms, LLC). It carries an approved 5-year cannabis permit and a deep stack of improvements — but most of those structures are unpermitted, which makes them a liability rather than value. We underwrite the parcel at just above raw land, and the deciding question is carrying cost, not purchase price.
The thesis in three lines. (1) Value ≈ raw land. The improvements don't add net value — the unpermitted ones are a code-compliance liability we'd discount, then monetize via operator leases rather than run ourselves. (2) Carrying cost is the real decision. A 113-acre estate of this kind runs ~$150–250K/yr to hold, and a purchase raises the largest line (property tax) via Prop 13 reassessment. (3) The residence is a solved problem — a ~$2M / 2,400 sf build, not the seller's $8–12M / 6,000 sf vision.
Williamson Act / conservation easement: ruled out. Confirmed with a land-use consultant — qualifying would require bringing the unpermitted structures up to code (easily six figures), which dwarfs the ~$25–30K/yr tax saving. Not worth it.
Large-acreage parcels in the Petaluma West / Burnside corridor have traded at $24.7K–$35.1K/acre over the last 21 months (4300 Browns Lane $25.9K, 5000 Carroll Rd $24.7K, 5335 Burnside Rd $35.1K). At 113 acres that is a raw-land range of ~$2.8–4.0M.
The improvements net to roughly zero: the unpermitted structures (see below) carry a six-figure code-compliance liability, partly offset by operator-lease income — we'd lease the equestrian, event, and glamping build-outs to operators rather than run them ourselves (demolition is off the table). The grandfathered cannabis entitlement, the three wells, and 2.5 miles of perimeter fencing are modestly value-positive. Net, we value the property a notch above raw land — consistent with the ~$4.3M offer sitting near the top of a defensible range. Analytical estimate, not an appraisal.
The property has a documented pattern of building without permits: 6 recorded Notices of Agricultural Exemption (2002–2018), the lower-barn commercial kitchen installed without permits (TDS § C.4), and wedding-permit violations in 2014 and 2018. Assessed improvements are only $334K because so much was built ag-exempt or unpermitted.
This is the hinge of the whole deal. It is why the improvements don't price as value, why Williamson/easement are off the table (qualifying means legalizing them), and why the cannabis operating certificate is gated (Condition 34 requires abating violations first). Budget a six-figure range to resolve — legalize where lease income justifies it; otherwise lease to operators who run under their own permits and insurance (demolition is off the table). Firm it up with a contractor walk, and treat anything beyond the assessor's listed structures as unpermitted until proven otherwise.
This is the number that matters. A purchase resets property tax upward, and the estate's operating footprint is expensive to hold regardless of use. Annual, at a ~$4.3M close:
| Line | $/yr | Lever to cut it |
|---|---|---|
| Property tax (Prop 13 at ~$4.3M; +~$2M house once built) | $47K → ~$69K | Structural floor — Williamson ruled out |
| Labor (1 FT ranch hand) | $50–70K | Part-time/seasonal if ops wound down |
| Off-site property management | $30–60K | Self-manage → near $0 |
| Building maintenance (many structures) | $15–25K | Offset by operator-lease income; lessees maintain their areas |
| Insurance (ag structures, SRA wildfire) | $15–25K | Push liability to operators via leases; drops if cannabis lapses |
| Pasture, grounds, orchard | $10–15K | Shift to grazing lessee |
| Fencing, road, drainage | $10–15K | — |
| Utilities (3 PG&E services, well pumps, propane) | $10–15K | Solar + battery |
| Well, septic, water service | $5–8K | — |
| Cannabis compliance (if kept active) | $10–15K + $250K yr-1 | Let permit lapse → $0 |
| Full operations | $200–250K | |
| Stripped (self-managed; cannabis lapsed; structures leased to operators) | ~$100–130K, less lease income |
The catch: property tax (~$69K once the house is built) is the one big line Williamson would have cut, and now can't. So the carry floor is structurally higher than for a comparable enrolled ranch — which is exactly why trimming the variable lines (lease the structures to operators, cut staff/management, lapse cannabis, solar) is where the real money is.
The grazing lease is the headline carry lever: a cattle/sheep operator pays to graze, takes pasture maintenance off the owner, and keeps the land working — worth doing on its own merits, independent of any tax program. The plan assumes the existing 2.5-mi perimeter and adds interior cross-fencing.
There's no house on the parcel (original demolished 2001). The seller's vision is a 6,000 sf home with $8.3–11.2M construction bids — irrelevant to us. Our path is a ~2,400 sf house at roughly $2M all-in, which is a reasonable, well-understood build.
Tax on the new build. Prop 13 assesses new construction at the market value it adds on completion, so a $2M house adds ~$2M to assessed value → ~$22K/yr of additional property tax (folded into the carry table above).
Can the house be property-tax-exempt as a farmhouse? No. The "ag exemption" (Health & Safety Code §19100) is a building-permit exemption for structures housing livestock, hay, or machinery — it excludes human habitation and isn't a property-tax exemption. A grazing lease doesn't change this: a dwelling is assessed at market regardless of how agricultural the surrounding land is, and even Williamson assesses the residence at market. The legitimate property-tax move is to keep the dwelling modest and shift spend toward genuine ag improvements (ag-exempt barns/shelters, wells, fencing), which carry little assessed value. Confirm the assessable basis with the assessor before finalizing scope.
Income tax is a different — and real — lever. If the farm is run as a bona fide business through an entity that employs the operator, and there's a genuine reason to live on-site (livestock, security, 24/7 availability), IRC §119 can exclude the home's rental value from the operator's income (employer-provided lodging "for the convenience of the employer"), with a farm-office deduction on top. The catch: this needs us to actively operate the farm, not just collect a passive grazing lease — plus entity structuring and a CPA. It lowers income tax, not the ~$22K/yr property-tax line.
Approved 2026-04-28, 5-year limited term, 15,000 sf — and grandfathered under the pre-2026-07-01 ordinance (a fresh application here likely couldn't clear the new residential setbacks). That optionality is the entitlement's real value. But it's gated and loaded: the operating certificate requires abating the unpermitted-structure violations first (Condition 34); operation requires a 250,000-gal rainwater catchment and caps water at 1.0 ac-ft/yr; and Fidelity won't insure a cannabis-associated transaction, so closing needs a specialty underwriter or a restructure. For a buyer not operating cannabis, letting it lapse removes cost — but keeping the entitlement alive preserves resale optionality.