Before an appraiser writes a single comparable sale onto the grid, a question has to be settled: what is this parcel's most productive legal use, and does the existing house represent it? That conclusion is called HIGHEST AND BEST USE, it appears on nearly every residential appraisal, and on most Claremont properties it is answered in a sentence and never thought about again. On a minority of properties it is the whole assignment.
This article explains the four tests behind the conclusion, why it usually reads as boilerplate, and the specific Claremont situations where it stops being boilerplate. It deepens the appraisal cluster; the general question of how a value is assembled once the use is settled is covered in the what-decides-the-number guide. Standing frame: this is general information about appraisal practice, not zoning, legal or tax advice, and the City of Claremont is the authority on what any particular parcel permits.
The four tests, in order
Highest and best use is the use that is legally permissible, physically possible, financially feasible, and maximally productive - and the order matters, because each test screens out candidates before the next one runs.
LEGALLY PERMISSIBLE comes first. Zoning, recorded restrictions, easements, overlay districts and any applicable historic designation define the universe of allowable uses. A use that is not permitted does not enter the analysis, however profitable it might be.
PHYSICALLY POSSIBLE screens what the site can actually support: size, shape, topography, access, utilities, soil, and in the foothill portions of town, slope. A parcel that is legally divisible but physically awkward may support far less than the zoning suggests.
FINANCIALLY FEASIBLE asks whether a surviving candidate would produce a return sufficient to justify the cost of getting there. MAXIMALLY PRODUCTIVE then picks the single use, among those that survive, that supports the highest value.
The analysis is run twice on an improved property: once for the site as though vacant, and once for the property as improved. That second run is where the interesting answers live.
Why it usually reads as boilerplate
On a typical Claremont house on a typical lot in a residential zone, the existing single-family use is legal, the site supports it, it is plainly feasible, and nothing else would produce more. The appraiser concludes that the present use is the highest and best use, and the report moves on. That is not laziness. It is the correct answer to an easy question, and readers should not read significance into a short paragraph.
When it stops being boilerplate
Several Claremont situations change the answer, and each one changes how the rest of the report should be read.
The first is a house whose contribution has fallen below the site's value. Where an aging, functionally awkward structure sits on a desirable parcel, the property as improved may be worth less than the site as though vacant. When an appraiser reaches that conclusion, the sales analysis shifts toward land, and the comparable set stops being houses.
The second is an accessory dwelling unit. State law has broadened what is permissible on residential parcels considerably in recent years, and the rules have moved repeatedly, so the current standards and the city's own requirements are what govern rather than any general description here. Where a second unit exists or is clearly permissible, the conclusion about the property's most productive use can shift, and the practical point is to verify current standards with the city rather than assume them.
The third is an irregular or oversized parcel. Where a lot could conceivably support more than one dwelling, whether it actually may is a legal question with a specific answer, and the answer belongs to the city and to a land use professional, not to a rule of thumb.
The fourth is a historic or otherwise restricted property, where legal permissibility is narrowed by designation, and the analysis has to respect that narrowing even when the market might reward something else.
What this means for a Claremont seller or buyer
For a seller, the practical consequence is about pricing logic rather than paperwork. If the highest and best use of your property is genuinely as a site, the buyer pool and the comparable evidence are different from what a conventional listing assumes, and marketing the property as a house first can mean pursuing the wrong audience. That is a pricing and positioning conversation, and it is exactly where a broker's opinion of value does useful work - a distinction drawn in the appraisal versus CMA guide.
For a buyer with plans, the warning is sharper. A lender's appraisal values the property as it exists and as it may lawfully be used, not as your architect imagines it. An appraisal will not credit a future project that has not been permitted, and it is not a substitute for a zoning check. Verify what the parcel permits with the City of Claremont before the plan drives the price you are willing to pay.
Anthony Grynchal is a licensed real estate salesperson, not a licensed appraiser and not a land use consultant. He prepares a comparative market analysis for pricing and negotiation, coordinates independent, state-licensed appraisers when a formal valuation is required, and routes zoning and entitlement questions to the city and to qualified professionals. He does not perform, certify or influence appraisals.
Start at the appraisal hub for the full cluster, and read the low-turnover comps guide next if your parcel is unusual enough that the comparable evidence is going to be the hard part. Anthony Grynchal has been licensed in California since November 2009 and treats the highest and best use paragraph as the first thing to read on any report covering an odd parcel. This is general information, not legal, zoning or tax advice; the city and your own advisors govern your property.
Frequently asked questions
What does highest and best use mean on an appraisal?
It is the appraiser's conclusion about the most productive use of a property that is legally permissible, physically possible, financially feasible and maximally productive. On most Claremont homes the existing residential use is the answer and the paragraph is brief.
Can a Claremont house be worth less than its land?
It can. Where an aging or functionally obsolete structure sits on a desirable parcel, the property as improved may contribute less than the site as though vacant. When an appraiser reaches that conclusion the comparable evidence shifts toward land sales.
Does an appraisal confirm what I can build on a parcel?
No. An appraisal values the property as it exists and as it may lawfully be used. It is not a zoning determination. Verify what any parcel permits with the City of Claremont and with qualified land use professionals before relying on a development plan.
Does highest and best use change if I add an accessory unit?
It can, because the analysis turns on what is legally permissible and most productive. State and local standards for accessory dwelling units have changed repeatedly, so confirm current requirements with the City of Claremont rather than relying on a general description.

Written by
Anthony Grynchal
Anthony Grynchal is a California real estate professional with eXp Realty, licensed since November 2009 (California DRE# 01873626), and the Designated Local Expert™ for Claremont — where he has lived for more than 33 years.
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