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 value — the unpermitted ones are a code-compliance liability we'd discount or remove. (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-to-negative: the unpermitted structures (see below) carry a code-compliance / demolition liability, and the equestrian, event, and glamping build-outs have little resale utility to a buyer who won't run those businesses. The grandfathered cannabis entitlement, the three wells, and 2.5 miles of perimeter fencing are the only clearly value-positive items, and modestly so. 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 legalize-or-remove, firmed up by a contractor walk; 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 | Falls sharply if liability structures removed |
| Insurance (ag structures, SRA wildfire) | $15–25K | Drops with fewer structures / no cannabis |
| 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 (land + house + grazing lease) | ~$90–120K |
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 shedding the variable lines (structures, staff, cannabis, energy) is where the real money is.
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.
Open question — tax on the new build. Prop 13 assesses new construction at the market value it adds on completion, so a $2M house adds roughly $2M to the assessed value → ~$22K/yr of additional property tax (already folded into the carry table above). Site work and landscaping are partly non-assessable, but the habitable structure is fully captured; there's little room to shrink this line. Worth confirming the exact assessable basis with the county assessor before finalizing scope.
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.
A cattle/sheep grazing lease is worth doing on its own merits now — it produces income, shifts pasture maintenance off the owner, and keeps the land working — independent of any tax program. The plan assumes the existing 2.5-mi perimeter and adds interior cross-fencing.