Vacant Land Appraisal

Highest and best use is the analysis

USPAP Standards Rule 1-3(b) requires an opinion of highest and best use when that is necessary for credible assignment results in developing a market value opinion. For vacant land it effectively always is, because there is no existing use to anchor the value.

The four tests are legally permissible, physically possible, financially feasible, and maximally productive. On California land, the legal test carries most of the weight. General plan designation, zoning, the Subdivision Map Act (Government Code sections 66410 et seq.), CEQA clearance (Public Resources Code sections 21000 et seq.), and any coastal development permit requirement under the Coastal Act (Public Resources Code sections 30000 et seq., permit requirement at section 30600) determine what can be approved and how long approval takes.

On the coast, note who actually issues the permit. Under section 30519(a), once a local government's Local Coastal Program is certified and all implementing actions within the affected area have become effective, development review authority over new development in that area passes from the Coastal Commission to the local government. Section 30519(b) holds back the exceptions: the Commission keeps its own authority over tidelands, submerged lands, and public trust lands, whether filled or unfilled, over port development governed by Chapter 8, and over state university and college lands in the coastal zone. Where a certified LCP is in place, the processing path and timeline start at the city or county counter, so confirm the parcel's LCP status before assuming a Commission hearing.

Outside those reserved categories, the Commission's remaining role over local permit decisions is appellate, in the categories listed at section 30603: development between the sea and the first public road paralleling the sea, or within 300 feet of the inland extent of any beach or of the mean high tide line of the sea where there is no beach, whichever is the greater distance; development on tidelands, submerged lands, or public trust lands, within 100 feet of any wetland, estuary, or stream, or within 300 feet of the top of the seaward face of any coastal bluff; development in a sensitive coastal resource area; major public works projects and major energy facilities; and, in a coastal county, development that is not the principal permitted use. Two of those categories were narrowed effective June 30, 2025, when AB 130 amended section 30603 so that the sensitive coastal resource area category and the coastal county non-principal-permitted-use category no longer apply to a residential development project, which section 30114.5 defines as a multifamily housing project that consists exclusively of residential uses and includes four or more units. A single-family lot does not meet that definition, so the narrowing does not reach it.

Where I conclude a use other than current zoning, I have to support the reasonable probability of the change and then discount for the time, cost, and risk of obtaining it. Without that support it is not a conclusion, it is an assumption, and it has to be labeled as one.

Entitlement status is a ladder, and each rung has a price

Raw land with only a general plan designation, land with base zoning, land with an approved tentative map, land with a recorded final or parcel map, and a finished lot that is permit-ready are five different products. They rarely share comparables, and a single per-acre metric applied across them will mislead.

A tentative map has a statutory life, and an expiring map is a diligence item, not a footnote. Under Government Code section 66452.6 an approved or conditionally approved tentative map expires 24 months after approval, subject to a local ordinance extension of up to 24 additional months, discretionary extensions that may total up to six years, an automatic 60-day extension while a timely extension application is pending, and tolling in defined circumstances such as a development moratorium or litigation. CEQA status matters just as much: a project with a certified EIR or a documented exemption is worth materially more than an identical site facing an initial study.

The entitlement assumption belongs in the report explicitly. If you need a value that assumes approvals not yet in hand, that is a hypothetical condition under USPAP, and it will be labeled as one.

California and San Diego County constraints that drive land value

Habitat. Subregional planning under the Natural Community Conservation Planning Act (Fish and Game Code sections 2800 et seq.) covers San Diego County unevenly, and the difference between an adopted plan and one still in preparation is a difference in permitting path and timeline. Two subregional plans are in place. The County's Multiple Species Conservation Program South County Subarea Plan was adopted by the Board of Supervisors in October 1997, within an MSCP area that also includes the City of San Diego and other cities holding their own subarea plans. The Multiple Habitat Conservation Program, prepared with SANDAG as lead planning entity and completed in 2003, covers the north county cities of Carlsbad, Encinitas, Escondido, Oceanside, San Marcos, Solana Beach and Vista, but MHCP take coverage attaches through each city's own subarea plan, and the Department of Fish and Wildlife's plan summary lists only Carlsbad's subarea plan as carrying an implementing agreement and an NCCP permit, both from 2004. Two more are still in preparation and confer no take authorization: the North County Plan for the unincorporated north county, proceeding under a restated and amended planning agreement signed in 2021, and the East County Plan, which would extend the MSCP into the eastern unincorporated county and has not moved past the preliminary draft map released in 2008. Land in those two areas is permitted project by project, through CEQA review and separate consultation with the state and federal wildlife agencies, which is a slower and less certain path than coverage under an adopted subarea plan. Which plan governs a parcel, if any does, and whether it falls inside a preserve hardline, has to be checked against the applicable subarea plan rather than assumed countywide. Hardline acreage may have little or no development potential and should not be valued on a blended per-acre basis with developable land.

Agricultural restriction. Land under a Williamson Act contract (Government Code sections 51200 et seq.) is restricted to agricultural and compatible uses on a rolling term that adds a year on each anniversary unless notice of nonrenewal is given. A standard contract carries a minimum initial term of ten years under Government Code section 51244; a farmland security zone contract under Government Code section 51296.1 carries a minimum initial term of twenty years, so its nonrenewal unwind runs correspondingly longer. Which of the two encumbers the parcel has to be confirmed, not assumed. For assessment, Revenue and Taxation Code section 423(d) provides that unless a party to the instrument creating the enforceable restriction expressly prohibits such a valuation, the capitalization-of-income valuation may not exceed the lesser of the section 110 valuation or the section 110.1 valuation, each computed as though the property were not subject to an enforceable restriction in the base year. Those two comparison figures are unrestricted values, not restricted ones, and the enrolled value is the lowest of the three. The contract runs with the land, and nonrenewal unwinds over years, not months. That belongs in the value conclusion.

Fire and topography. Fire hazard severity zones, designated moderate, high, or very high, are mapped by the State Fire Marshal under Government Code section 51178 in local responsibility areas and under Public Resources Code sections 4201 through 4204 in state responsibility areas. Those designations, together with steep slope and hillside ordinances and required brush management setbacks, reduce net usable area and raise development cost.

Infrastructure. Water and sewer availability, capacity fees, and legal access are frequently the binding constraint on rural and semi-rural San Diego County parcels. A preliminary title report is essential on a land assignment, because easements and access rights are value-determinative.

Methods appropriate to land

Sales comparison is the primary approach, adjusted on a unit that matches how buyers in that market actually transact: price per acre for acreage, per square foot for infill, per entitled unit or per buildable square foot for development sites.

Where improved sales dominate the market, extraction and allocation help isolate a land component. For an entitled subdivision with a defined lot program, the subdivision development method (a discounted cash flow of lot absorption net of development cost, marketing, and entrepreneurial profit) is appropriate, and the absorption schedule and discount rate have to be supported rather than asserted. That method is not appropriate for raw, unentitled ground, and applying it there inflates value.

Purpose changes the assignment

Estate work uses fair market value as defined in Treasury Regulation 20.2031-1(b) under IRC 2031. For estates only, an alternate valuation date is available under IRC 2032, generally six months after the date of death. The federal estate tax return is due nine months after death under IRC 6075(a), extendable. The federal exclusion amount is indexed annually and I do not quote it; that is a conversation for your CPA or estate attorney.

Gift work uses the parallel definition at Treasury Regulation 25.2512-1 under IRC 2512. There is no alternate valuation date for gifts: IRC 2032 is an estate tax provision and has no gift tax counterpart.

A charitable conservation easement donation for which a deduction of more than $5,000 is claimed requires a qualified appraisal under IRC 170(f)(11)(C), and where the claimed deduction exceeds $500,000, IRC 170(f)(11)(D) requires the qualified appraisal itself to be attached to the return. IRC 170(f)(11)(E) and Treasury Regulation 1.170A-17 supply the definitions of qualified appraisal and qualified appraiser and the requirements each has to meet. Valuation is governed by Treasury Regulation 1.170A-14(h)(3)(i), which looks first to sales of comparable easements where a substantial record of such sales exists, and applies the before-and-after method where it does not. Congress and Treasury have both tightened this area: IRC 170(h)(7), added in 2022 by Public Law 117-328 section 605(a)(1), denies qualified conservation contribution treatment to a partnership contribution exceeding 2.5 times the sum of each partner's relevant basis, subject to exceptions including contributions made at least three years after defined acquisition dates and contributions by family partnerships, and final regulations published October 8, 2024 at Treasury Regulation 1.6011-9 identify certain syndicated conservation easement transactions as listed transactions. Those provisions reach syndicated and pass-through deals rather than an owner's donation of an easement over their own land, but the substantiation rules above apply to every easement deduction.

Eminent domain and partial takings use the California statutory measure of compensation at Code of Civil Procedure section 1263.310 and the fair market value definition at section 1263.320, with severance damages to the remainder and offsetting benefits addressed under sections 1263.410 and following. I offer deposition and expert witness testimony.

For a property tax appeal, value is full cash value under Revenue and Taxation Code section 110, and the regular assessment appeal window is set by section 1603(b): July 2 through September 15 in counties where the assessor mails notice of assessed value to all assessees by August 1, and July 2 through November 30 otherwise. Confirm the current year's deadline with the county Clerk of the Board before relying on either date.

Common questions

Sources

Every statutory and regulatory claim on this page traces to one of the following. Where a source could not be confirmed, the claim was removed rather than softened.

1. USPAP (2024 Edition), Standards Rule 1-3(b): an appraiser must develop an opinion of highest and best use when necessary for credible assignment results in developing a market value opinion. USPAP also defines a hypothetical condition as a condition contrary to what is known to exist but supposed for purposes of analysis, which must be disclosed.
2. California Subdivision Map Act, Government Code sections 66410 et seq.; section 66452.6 (an approved tentative map expires 24 months after approval, subject to a local ordinance extension of up to 24 additional months, discretionary extensions of up to six years total, an automatic 60-day extension pending a timely application, and tolling).
3. California Environmental Quality Act, Public Resources Code sections 21000 et seq.
4. California Coastal Act, Public Resources Code sections 30000 et seq.; section 30600 (coastal development permit required); section 30519(a) (once a Local Coastal Program is certified and all implementing actions within the affected area have become effective, the Commission no longer exercises Chapter 7 development review authority over new development in the area, which is delegated to the local government); section 30519(b) (that delegation does not reach development on tidelands, submerged lands, or public trust lands, whether filled or unfilled, port development governed by Chapter 8, or state university or college lands within the coastal zone).
5. California Coastal Act, Public Resources Code section 30603 (categories of locally approved development appealable to the Commission: development between the sea and the first public road paralleling the sea or within 300 feet of the inland extent of any beach or of the mean high tide line of the sea where there is no beach, whichever is the greater distance; development on tidelands, submerged lands, or public trust lands, within 100 feet of any wetland, estuary, or stream, or within 300 feet of the top of the seaward face of any coastal bluff; sensitive coastal resource areas; major public works projects and major energy facilities; and, in a coastal county, development that is not the principal permitted use), as amended by AB 130 (Stats. 2025, ch. 22), effective June 30, 2025, so that the sensitive coastal resource area category and the coastal county non-principal-permitted-use category do not apply to a residential development project; Public Resources Code section 30114.5 (added by AB 130, defining residential development project as a multifamily housing project that consists exclusively of residential uses and includes four or more units); California Coastal Commission, memorandum of the Executive Director to Planning Directors of Coastal Counties and the Cities of Grover Beach and Dana Point, September 5, 2025, describing those two changes and listing the section 30603(a)(1) and (a)(2) grounds that remain available against residential development projects.
6. Williamson Act (California Land Conservation Act of 1965), Government Code sections 51200 et seq.; Government Code section 51244 (contract initial term of no less than 10 years, with a year added automatically on each anniversary unless notice of nonrenewal is given); Government Code section 51296.1 (farmland security zone contract initial term of no less than 20 years, on the same automatic annual extension); Revenue and Taxation Code section 423(d) (unless a party to an instrument which creates an enforceable restriction expressly prohibits such a valuation, the capitalization-of-income valuation shall not exceed the lesser of the valuation under Section 110 or under Section 110.1, as though the property was not subject to an enforceable restriction in the base year); Revenue and Taxation Code sections 110 and 110.1.
7. Natural Community Conservation Planning Act, Fish and Game Code sections 2800 et seq. County of San Diego Planning & Development Services, County Subarea Plan (the County Subarea Plan, or South County Subarea Plan, was adopted by the Board of Supervisors in October 1997; the San Diego MSCP Plan for the southwestern portion of the county was approved in 1998). California Department of Fish and Wildlife, NCCP Plan Summary, San Diego Multiple Habitat Conservation Program (lead planning entity San Diego Association of Governments; Final MHCP completed in 2003; NCCP permits to be issued to participating cities upon completion and CDFW approval of their individual subarea plans; City of Carlsbad subarea plan implementing agreement signed 2004 and NCCP permit issued 2004). California Department of Fish and Wildlife, NCCP Plan Summary, North County Multiple Species Conservation Program Plan (San Diego County) (restated and amended planning agreement signed 2021; plan documents at public review draft stage; no implementing agreement or permit listed), and CDFW NCCP Plan Summaries (listing the North County MSCP among plans in preparation). County of San Diego Planning & Development Services, East County Plan (plan development slowed; preliminary draft map released 2008).
8. Government Code section 51178 (the State Fire Marshal shall identify areas in the state as moderate, high, and very high fire hazard severity zones based on consistent statewide criteria); Public Resources Code sections 4201-4204 (the State Fire Marshal shall classify lands within state responsibility areas into fire hazard severity zones).
9. IRC 2031 and Treas. Reg. 20.2031-1(b) (estate tax fair market value: the price at which property would change hands between a willing buyer and a willing seller, neither under compulsion, both reasonably informed); IRC 2032 (alternate valuation date, estate tax only); IRC 6075(a) (estate tax return due within nine months of the date of death).
10. IRC 2512 and Treas. Reg. 25.2512-1 (gift tax fair market value; the parallel willing-buyer/willing-seller standard, with no alternate valuation date).
11. IRC 170(f)(11)(C) (qualified appraisal required for contributions of property for which a deduction of more than $5,000 is claimed) and IRC 170(f)(11)(D) (qualified appraisal must be attached to the return where a deduction of more than $500,000 is claimed); IRC 170(f)(11)(E) (definitions of qualified appraisal and qualified appraiser) and Treas. Reg. 1.170A-17 (requirements for each); Treas. Reg. 1.170A-14(h)(3)(i) (conservation easement valuation: sales of comparable easements where a substantial record of such sales exists, otherwise the before-and-after method); IRC 170(h)(7), added by Pub. L. 117-328, section 605(a)(1) (2022) (a partnership contribution is not treated as a qualified conservation contribution if it exceeds 2.5 times the sum of each partner's relevant basis, with exceptions for contributions made at least three years after the defined acquisition dates and for family partnerships); Treas. Reg. 1.6011-9, added by T.D. 10007, 89 Fed. Reg. 81341 (Oct. 8, 2024) (identifying certain syndicated conservation easement transactions and substantially similar transactions as listed transactions).
12. California Code of Civil Procedure section 1263.310 (measure of compensation is the fair market value of the property taken), section 1263.320 (definition of fair market value), sections 1263.410 et seq. (severance damages to the remainder and offsetting benefits).
13. California Revenue and Taxation Code section 110 (full cash value) and section 1603(b) (assessment appeal application filed July 2 to September 15, extended to November 30 where the assessor does not mail notice of assessed value to all assessees by August 1).
14. California Real Estate Appraisers' Licensing and Certification Law, Business and Professions Code sections 11300 et seq. (BREA authority to issue the Certified General Real Estate Appraiser credential).

Related reading

• What is highest and best use?
• Conservation Easement Appraisal
• Commercial real estate appraisal