Buying Property With a Conservation Easement in Marin, Sonoma or Napa

Buying property with a conservation easement means buying land whose development rights have been permanently limited by a recorded agreement held by a land trust or public agency. In California the easement is an interest in real property, perpetual in duration, that binds every later owner, and the holder can go to court to enforce it. You own the land, farm it and live on it as the deed allows, but you can’t subdivide or build beyond what the easement reserves.

Across West Marin, Sonoma and Napa, many ranches, vineyards and rural estates carry these restrictions. The easement deed, not the zoning map, often sets the real limits on a property. This post explains the law, who holds easements locally, what to read during escrow, and how an easement affects value, financing and a later sale. For the wider market for estates and ranches, see our luxury real estate section.

What a conservation easement is under California law

California’s conservation easement statute starts at Civil Code section 815. Four sections matter most to a buyer:

• Definition (815.1). A limitation in a deed or other instrument, created by the landowner, that binds successive owners and keeps land mainly in its natural, scenic, historical, agricultural, forested or open-space condition.
• Nature and duration (815.2). The easement is an interest in real property, voluntarily created, and “perpetual in duration.” Its particular terms are whatever the recorded instrument says.
• Who may hold one (815.3). A 501(c)(3) nonprofit whose primary purpose is land protection, a government entity allowed to hold real property, or certain California Native American tribes.
• Enforcement (815.7). The holder can seek an injunction against actual or threatened harm and recover damages, including restoration costs and lost scenic or environmental value. The court may award attorney’s fees to the winning side.

Section 815.7 also says an easement isn’t invalid because the instrument doesn’t say it runs with the land. So don’t expect to argue your way out of one. Read it as a permanent term of ownership.

Who holds easements in Marin, Sonoma and Napa

Other nonprofits and agencies hold easements too, so look at who the grantee is on the recorded document. The holder’s identity matters, because its staff will review your plans and visit the property for as long as you own it.

In West Marin, protected ranches cluster around towns such as Nicasio, Tomales and Olema. MALT says its easements now cover the majority of privately owned agricultural land in West Marin.

What the easement deed controls

No two deeds are the same, and Section 815.2 makes the recorded text the rule. When we read one with a buyer, these are the provisions we look for:

• Purpose clause. Agricultural, scenic, habitat or a mix. Holders interpret requests against it.
• Subdivision. Whether parcels may be split, sold separately or adjusted, and whether existing legal parcels must stay under one owner.
• Building envelopes. Mapped areas where homes, barns and other improvements may sit, and anything permitted outside them.
• Residences. How many dwellings are allowed, size limits, and whether guest houses, farmworker units or ADUs count against them.
• Agricultural use. Whether farming is merely allowed or required, and limits on practices such as tillage, grading or new plantings.
• Reserved rights. What the original owner kept, such as a future homesite, a road, a well or a pond.
• Prohibited uses. Commercial uses, mining, dumping, signs, fences or roads that the deed bars.
• Approval process. Which projects need the holder’s prior approval, how far ahead to ask, and how disputes are resolved.
• Transfer terms. Any notice to the holder when the property sells, and any transfer fee or other rights on a sale.

Both MALT and Ag + Open Space publish permitted-use request forms. MALT says new buildings or roads need its approval through a permitted use form before installation. Ag + Open Space says some uses need its approval before they start, and asks for project plans and maps with the request.

What you inherit as the new owner

The restrictions come with the land, and so does the relationship with the holder. Expect:

• Monitoring visits. Ag + Open Space says its staff regularly monitor conserved lands and document their condition. Ask each holder how often it visits and what it records.
• Prior approval for projects. A remodel inside an envelope may be simple. A new barn, road, vineyard block or pond may need the holder’s sign-off as well as county permits.
• Enforcement for past problems. A violation by a prior owner, such as an unapproved structure, can become your problem to fix. That’s why the holder’s file matters as much as the inspection.
• Help, in some cases. MALT runs a Stewardship Assistance Program that offers planning help and funding to landowners with MALT easements.

The easement sits on top of zoning and any Williamson Act contract. A property can be bound by all three; our guide to the Williamson Act covers the farmland tax contract.

Due diligence during escrow

1. Get the recorded easement and any amendments. The preliminary title report lists them; order full copies, including exhibits and maps. Our guide to title insurance in California explains the report.
2. Ask the holder for its file. Request the baseline documentation report, recent monitoring reports, approvals already granted and any notices of violation.
3. Walk the property against the maps. Check that structures, roads, fences and plantings sit where the easement allows and that each has any approval it needed.
4. Test your plans. If you intend to remodel, add a guest house, plant vines or change grazing, write it down and ask the holder before you remove contingencies.
5. Check the other overlays. Zoning, Williamson Act status, water rights and septic capacity still apply. Our vineyard due diligence guide covers the farm side.
6. Talk to your lender and insurer early. Confirm the lender’s appraiser will value the property as restricted.
7. Get advice on the deed. A real estate attorney who has read conservation easements can flag the clauses that affect your plans.

Diamond may refer you to partners we work with, such as attorneys, appraisers and surveyors; you’re free to choose any provider.

Value, appraisal and financing

An easement takes development rights off the table, so price follows what the land can be used for under the deed. A ranch with one permitted homesite isn’t comparable to a nearby parcel that can be split into several lots. Comparable sales should be other restricted properties where possible.

Lenders vary in how they treat restricted rural land. Raise the easement with any lender at the start, and have the appraiser read it. Buyers looking at acreage should also read our posts on ranch and acreage properties in Sonoma County and family compounds, where the number of allowed homes often drives the plan.

Tax background: why easements exist

Many easements were sold to a holder, and others were donated. The IRS says Congress created a federal income tax deduction for owners who give up some of their ownership rights to protect land or buildings for future generations. The Internal Revenue Code calls this a “qualified conservation contribution,” defined in section 170(h)(1).

That deduction belonged to the donor. It doesn’t pass to you as a buyer. The IRS also warns about syndicated easement deals that generate inflated deductions, so if a property was part of a syndicated donation, ask your adviser what that history means for you. This is general information, not legal or tax advice; ask a California real estate attorney who reads conservation easements, or your tax adviser, how a particular deed affects you.

Selling a property with a conservation easement

Sellers should prepare the same file a buyer will ask for: the recorded easement, the holder’s approvals and the latest monitoring report. Check the deed for any notice the holder needs before or after the sale. Price the property against other restricted land, and market what the easement allows, such as the permitted homesite and farm uses, so buyers see the plan clearly. Our pages on Marin County land and Napa County land cover local rules that sit alongside the easement.

Questions people ask

Can you build on land with a conservation easement?

Often yes, but only what the deed reserves, usually inside mapped building envelopes, and often with the holder’s prior approval as well as county permits.

Can a conservation easement be removed?

California law makes conservation easements perpetual. Plan on the restrictions lasting for the whole time you own the property and beyond.

Does the land trust own my property?

No. The holder owns the easement, an interest in real property, while you own the land. The holder has the right to monitor and enforce the deed’s terms.

Will the easement holder visit my property?

Yes, holders monitor their easements. Ag + Open Space says its staff regularly monitor conserved lands; ask each holder how often it visits.

Do I get a tax deduction when I buy land with an easement?

No. Any federal deduction for a donated easement went to the person who donated it. A buyer simply pays a price that reflects the restrictions.

What is a baseline documentation report?

It’s the holder’s record of the property’s condition when the easement was created. Request it in escrow so you can compare today’s improvements with what existed then.

Who enforces a conservation easement in California?

The holder, and in some cases the grantor, under Civil Code 815.7. Courts can order a stop to violations and award damages, including restoration costs.

Looking at a ranch, vineyard or estate with a conservation easement? Contact Diamond and we will help you gather the deed, the holder’s file and the county records before you commit.

Sources & notes

• California Public Law: Civil Code section 815.1
• California Public Law: Civil Code section 815.2
• California Public Law: Civil Code section 815.3
• California Public Law: Civil Code section 815.7
• Marin Agricultural Land Trust: Farmland protection
• Marin Agricultural Land Trust: For landowners
• Sonoma County Ag + Open Space: Frequently asked questions
• Sonoma County Ag + Open Space: Easement stewardship
• Land Trust of Napa County: Home page
• Cornell LII: 26 U.S.C. 170, charitable contributions (qualified conservation contribution defined in 170(h)(1))
• Internal Revenue Service: Conservation easements
• Statutes were read on California Public Law and Cornell LII because the Legislature’s site was unreachable. Each easement’s terms differ; the provisions listed are what to look for, not what every deed contains.

Last reviewed October 2026 by Matthew Martinez.