IRS Conservation Easement Rules: Requirements, Appraisals, and Penalties

The IRS conservation easement rules allow a landowner who permanently restricts how their property can be used to deduct the resulting loss in the property’s value, but only if the donation satisfies every requirement in Internal Revenue Code Section 170(h) and its regulations. Miss one, and the deduction is gone in full. What follows is what the Service actually checks, in the order it tends to matter.

The Three Statutory Tests

A deductible conservation easement has to clear three tests at the same time.

A Qualified Real Property Interest

The donation must be one of three things: the donor’s entire interest in the property (minus any mineral rights kept back), a remainder interest, or a permanent restriction on how the land can be used.¹ Almost every deduction rides on that third category: you keep the land, but you irrevocably give up specified development rights. The restriction has to run in perpetuity. A term of years does not qualify.

A Qualified Donee

The recipient must be either a government body or a publicly supported 501(c)(3) that also meets Section 509(a)(2) or 509(a)(3).² In practice, it is almost always a land trust, and it must have the resources and legal commitment to monitor and enforce the restrictions forever. A thinly funded organization that cannot realistically police violations for decades is something the IRS looks for.

A Recognized Conservation Purpose

The easement must serve at least one of four purposes:³

Preserving land for the general public’s outdoor recreation or education.
Protecting a relatively natural habitat for fish, wildlife, plants, or a similar ecosystem.
Preserving open space, including farmland and forest, either for the scenic enjoyment of the general public or in line with a clearly defined governmental conservation policy, and yielding a significant public benefit.
Preserving a historically important land area or a certified historic structure.

The open space category trips up more donors than any other. Restricting development on a parcel does not automatically produce a “significant public benefit”; the IRS weighs the measurable public gain against any private benefit to the owner. Façade easements on historic buildings in urban areas draw particular scrutiny, because local zoning may already impose the same restrictions, meaning the donor is giving up little or nothing.⁴

Mortgage Subordination

If there is a mortgage on the property, the lender has to subordinate its rights to the easement before or at the time of the donation. Treasury Regulation 1.170A-14(g)(2) allows no deduction on mortgaged property unless the mortgagee subordinates its rights to the donee’s right to enforce the conservation purpose in perpetuity.⁵

The logic is simple. If the lender can foreclose and wipe out the easement, the conservation purpose is not truly protected forever. Getting the subordination signed after the deed is recorded does not fix the problem. This is one of the most common reasons the IRS disallows conservation easement deductions outright.

Perpetual Protection in the Deed

Perpetuity is not just a word in the statute. Several specific pieces of paperwork have to line up.

Baseline Documentation Report

Before the donation closes, the donee prepares a Baseline Documentation Report: a detailed snapshot of the property’s condition when the easement takes effect, covering existing structures, land uses, vegetation, topography, and any other features tied to the conservation values being protected. Donor and donee both sign it, and the recorded deed must reference it.⁵ This report is what the donee uses year after year to catch violations.

Reserved Rights

You can keep certain rights to use the property, such as farming, limited timber harvesting, or maintaining existing structures, as long as those activities do not undermine the conservation values the easement is meant to protect. Every reserved right has to be spelled out in the deed. Reserving the right to build additional structures on a parcel supposedly preserved for open space, for example, is inconsistent with the stated purpose and can invalidate the deduction.

The Extinguishment Clause

The most technically demanding provision addresses what happens if unforeseen circumstances make the conservation purpose impossible and a court orders the easement terminated. The deed must ensure that on any later sale or exchange of the property, the donee receives a share of the proceeds proportionate to the easement’s value relative to the property’s total unrestricted value at the time of the original donation.⁶ That proportion stays fixed, even if values change dramatically. Omitting or miscalculating this language is grounds for complete disallowance, and courts have enforced the requirement strictly.

Mineral Rights and Surface Mining

If you keep a mineral interest under the easement land, no deduction is allowed unless surface mining is prohibited.² There is one exception: when surface and mineral ownership were already separated before the donation, and the probability of surface mining is “so remote as to be negligible,” the perpetuity test can still be met. Donors in regions with active mineral extraction face a higher burden of proof.

How the Deduction Is Valued

The deduction is not what the land is worth. It is how much value the land loses because of the permanent restrictions. Treasury regulations use a before-and-after approach: the property’s fair market value without the easement, minus its value with the easement in place.⁶

The “before” figure has to reflect the property’s realistic development potential given existing zoning and other regulations already in force. An appraiser who ignores existing zoning to inflate the “before” number is building a case the IRS will dismantle. The “after” figure reflects the deed restrictions and any uses you reserved.

Some easements do not reduce value at all, and some may increase it. A conservation easement on a residential lot surrounded by preserved open space, for instance, could make the lot more desirable. In that case, no deduction is available.

The Enhancement Rule

If granting the easement increases the value of other property owned by the donor or a related person, the deduction is reduced by that increase, whether or not the other property sits next to the easement parcel.

Reduction for Consideration Received

Anything you receive in exchange for granting the easement, whether cash, other property, or governmental approvals connected to the donation, reduces the deduction. Only the net value counts as a charitable contribution.

Appraisal Requirements

A deduction above $5,000 needs a qualified appraisal, and the IRS is strict about who prepares it, when, and how.⁷

Timing

The appraisal cannot be signed and dated earlier than 60 days before the contribution date, and you must receive the completed appraisal before the due date (including extensions) of the return on which the deduction is first claimed.⁷ Miss that window and the deduction cannot go on that return.

Who Qualifies

The appraiser must have verifiable education and experience in valuing the type of property at issue, and either the required coursework plus at least two years of relevant experience or a recognized professional designation.⁸ Certain people are disqualified outright: the donor, the donee, any party to the transaction through which the donor acquired the property, and any appraiser whose fee is a percentage of the claimed value.

Appraiser Penalties

An appraiser whose valuation causes a substantial or gross misstatement faces a penalty equal to the greater of 10% of the resulting tax underpayment or $1,000, capped at 125% of the appraisal fee.⁹ The only defense is showing the appraised value was more likely than not correct.

What Goes on the Return

Even a valid easement can lose its deduction if the paperwork on the return is wrong.

Form 8283

Any noncash contribution over $500 requires Form 8283.¹⁰ Conservation easement deductions above $5,000 go in Section B, which needs a qualified appraisal summary, the donee’s signed acknowledgment of receipt, and the appraiser’s signed certification of qualifications and independence. Every required field must be completed. Writing “available upon request” counts as nonresponsive and can trigger disallowance. If you truly cannot supply something like the acquisition date or cost basis, attach a written explanation showing reasonable cause.⁷

Attaching the Full Appraisal

When the claimed deduction is more than $500,000, the entire qualified appraisal has to be attached to the return, not just the Form 8283 summary.¹¹ Skipping this is its own separate ground for disallowance.⁷

Contemporaneous Written Acknowledgment

For any contribution of $250 or more, you need a written acknowledgment from the donee before the filing deadline for the return claiming the deduction. It must state whether the donee provided any goods or services in exchange and, if so, give a good-faith estimate of their value.² Keep it in your records; it does not get filed.

How Much You Can Deduct Each Year

A qualified conservation contribution is deductible in any single year up to 50% of the donor’s adjusted gross income, with unused amounts carrying forward for up to 15 years. Qualified farmers and ranchers get a 100% of AGI limit in the year of the contribution, with the same 15-year carryforward.²

Syndicated Deals and the 2.5x Rule

Syndicated conservation easements are the most aggressively enforced corner of this area, and the rules tightened substantially in recent years. These deals typically involve a promoter assembling investors into a partnership, which buys land, places an easement on it, and allocates deductions to partners that far exceed their investment.

Listed Transaction Status

The IRS has formally identified syndicated conservation easements as listed transactions. Final regulations define the transaction as one where promotional materials offer investors a possible deduction equal to or exceeding 2.5 times their investment in the pass-through entity, the entity contributes an easement on property it owns, and the entity allocates the deduction to investors.¹² Anyone who participates in a transaction that fits this description must file Form 8886 with their return.¹³ Failing to file when required triggers a penalty equal to 75% of the decrease in tax from the transaction, capped at $100,000 for individuals and $200,000 for other entities, regardless of whether the underlying deduction ends up valid.¹⁴

The 2.5x Basis Cap

The SECURE 2.0 Act, enacted in December 2022, added Section 170(h)(7): a partnership’s conservation contribution is not a qualified conservation contribution at all if the claimed deduction exceeds 2.5 times the sum of each partner’s relevant basis in the partnership. The same rule applies to S corporations and other pass-throughs.¹⁵ Three narrow exceptions apply:

The partnership held the property for at least three years before the contribution.
Certain family-owned pass-through entities.
Contributions whose conservation purpose is preserving a certified historic structure.

The cap applies to contributions made after December 29, 2022.¹⁵

Penalties and the Defects That Kill Deductions

An accuracy-related penalty of 20% applies when the claimed value is 150% or more of the correct value. At 200% or more, the penalty jumps to 40% of the resulting tax underpayment.¹⁶ In syndicated cases, the IRS routinely asserts the 40% penalty and the Tax Court has upheld it.¹⁷

Even without inflated values, deductions fail for technical reasons more often than most donors expect. The most frequent causes of complete disallowance:

The lender did not subordinate before or at the time of the donation.
The deed’s proceeds-sharing language does not match the regulatory formula or is missing.
Form 8283 is incomplete or filled with nonresponsive language.
The appraisal was signed too early, received too late, or not attached when the deduction exceeded $500,000.
The donor retained rights inconsistent with the stated conservation purpose.

Each of these defects can wipe out the whole deduction, not just reduce it. The IRS does not typically give partial credit for an easement that fails a technical requirement, even when the underlying conservation value is real.

1
Title 26-INTERNAL REVENUE CODE. 26 USC 170 – Definition: Qualified Real Property Interest
2
Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts
3
Title 26-INTERNAL REVENUE CODE. 26 USC 170 – Definition: Conservation Purpose
4
Internal Revenue Service. Conservation Easements
5
eCFR. 26 CFR 1.170A-14 – Qualified Conservation Contributions
6
GovInfo. 26 CFR 1.170A-14 – Qualified Conservation Contributions
7
Internal Revenue Service. Instructions for Form 8283
8
GovInfo. 26 CFR 1.170A-17 – Qualified Appraisal and Qualified Appraiser
9
Office of the Law Revision Counsel. 26 USC 6695A – Substantial and Gross Valuation Misstatements Attributable to Incorrect Appraisals
10
Internal Revenue Service. About Form 8283, Noncash Charitable Contributions
11
Internal Revenue Service. Publication 561 (12/2025), Determining the Value of Donated Property
12
Federal Register. Syndicated Conservation Easement Transactions as Listed Transactions
13
Internal Revenue Service. Instructions for Form 8886 (Rev. October 2022)
14
Office of the Law Revision Counsel. 26 USC 6707A – Penalty for Failure to Include Reportable Transaction Information With Return
15
Federal Register. Statutory Disallowance of Deductions for Certain Qualified Conservation Contributions Made by Partnerships and Other Pass-Through Entities
16
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
17
Internal Revenue Service. IRS Increases Enforcement Action on Syndicated Conservation Easements