Prospective Value: The Gap Between Two of Your Three Numbers Is a Feasibility Study

A construction appraisal reports three values. Two of them are separated by an absorption period, and an absorption period is not a valuation technique. It is a market finding, produced by demand analysis, and it is the same finding a feasibility study exists to establish.

Which means one of the three numbers in a construction appraisal is, in substance, a feasibility output wearing a valuation label. The as-stabilized value depends on when stabilisation happens. When stabilisation happens depends on how fast the market absorbs the space. How fast the market absorbs the space is a question about demand, competitive supply and the pipeline, and no amount of comparable sales analysis answers it.

That has a practical consequence worth stating at the outset: the single assumption that moves a construction appraisal most is not a cap rate or a comparable. It is the absorption period, and it is the assumption most often borrowed rather than derived.

This article sets out the feasibility half of prospective value work: how the absorption period is established, why it varies enormously by asset class and why borrowing it across classes is the characteristic error, how it sizes the reserves that keep a construction loan alive, and how the as-completed value now does a second job in the lender's capital calculation that most borrowers never hear about.

It then carries the appraisal framework as the supporting half.

The absorption period is the whole gap

Between physical completion and stabilised occupancy, a property must be leased or its business ramped. During that interval it incurs lease-up or absorption costs, meaning leasing commissions, tenant improvements, concessions and marketing; carrying costs, meaning debt service, taxes, insurance and operating expense against partial or no income; and the entrepreneurial incentive required to induce a developer to undertake the project at all.

A properly developed as-completed value discounts the as-stabilized value back to reflect that interval: the costs incurred, the time value, and the risk that stabilisation takes longer than projected.

So the arithmetic runs one way. Establish the absorption period first, then the as-completed value falls out of it. And because everything downstream depends on that one input, the sensitivity is worth showing:

*Illustrative.*

Same building, same stabilised value, same construction cost. One assumption moved by twelve months and the as-completed value moved by more than a million dollars.

That difference then propagates into three separate places: the loan the lender will size, the interest reserve the deal needs to survive, and the equity the borrower must contribute. All three are downstream of a number that came from a market study.

Absorption is asset-class specific, and borrowing it is the error

The reason absorption gets borrowed is that it feels like a general property, something like "twelve to eighteen months for lease-up." It is not. The interval from certificate of occupancy to stabilisation varies by a factor of six or more across the asset classes that dominate this kind of lending.

Read that table alongside the sensitivity above and the problem becomes obvious. An industrial absorption assumption applied to a self-storage deal understates the interval by two years, which overstates the as-completed value by well over a million dollars on a project of the size worked above, and under-sizes the reserve by a similar order.

There are also structural reasons for the spread that a study should be able to explain rather than simply assert. Industrial absorbs fast because it is frequently pre-leased before completion, so the lease-up largely happened before the certificate of occupancy. Self-storage absorbs slowly because demand arrives one household transition at a time and none of it can be pre-leased. Assisted living absorbs more slowly than independent living because the move-in is triggered by a health event rather than a preference. A hotel does not lease at all; it ramps, on a curve where rate recovers more slowly than occupancy.

So the question a reviewer should ask is not what absorption period was used but where it came from. If the answer is a general rule of thumb, the two prospective values are unreliable. If the answer is a demand analysis specific to this asset class in this submarket, with a competitive supply census and the pipeline accounted for, they are worth something.

This is precisely the point at which the appraisal and the feasibility study are answering the same question with different tools. The feasibility study establishes the absorption period from demand analysis. The appraisal uses it to bridge the two prospective values. Where the two documents assume different lease-up periods, one of them is wrong, and a credit committee that notices the inconsistency will ask about both.

The second job the as-completed value now does

Borrowers are told the appraisal sizes the loan. On a construction facility it does something else as well, and this one runs in a direction most sponsors find surprising.

A construction loan carries a materially higher regulatory capital charge for the lender unless it meets an exemption test, and the appraised as-completed value sits inside that test. The current framework, following the statutory change in 2018, applies to High Volatility Acquisition, Development or Construction exposures, and the exemption generally requires two things together: a loan to value ratio at or below the applicable maximum supervisory level, and borrower-contributed capital of at least fifteen per cent of the real estate's appraised as-completed value, contributed before the lender advances funds and retained through the life of the project.

Note what the fifteen per cent is measured against. Not cost. Value.

Which produces a result that looks wrong until you sit with it:

*Illustrative.*

Project A is the better development by a wide margin. It also has to put in $375,000 more equity to keep the lender out of the higher capital charge, because the test is proportional to the value it creates rather than to the money it spends.

Two practical consequences follow, and neither is intuitive.

A higher appraisal is not unambiguously good news for a highly leveraged sponsor. It supports a larger loan, which helps, and it raises the dollar contribution required for the exemption, which does not. Where leverage is modest the test is not binding and the point is academic. Where leverage is aggressive, the two effects pull against each other and the optimum is not "as high as possible."

What counts as contributed capital matters as much as the amount. The 2018 change permitted contributed real property to be credited at its appraised value rather than at the contributor's cost basis, which materially helps a sponsor contributing land held for a long time. For a sponsor sitting on appreciated land, that single provision can be the difference between meeting the test and not.

The instruction for a borrower is short. Ask the lender, before the appraisal is ordered, which value they will size against and whether the exemption test is binding on this deal. Both are one-sentence questions and both change the capital stack.

Absorption sizes the reserves, and there are two of them

A construction loan survives its lease-up on reserves, and the absorption period is what sizes them.

The interest reserve funds debt service on drawn balances through construction and through the ramp, until net operating income reaches debt service breakeven. It is sized off the absorption schedule in the appraisal or the feasibility study, which is why an optimistic absorption assumption does not merely overstate value: it under-funds the mechanism that keeps the loan current while the assumption is being tested.

The operating deficit reserve is a different thing and is often required alongside it. It funds operating shortfalls, meaning operating expenses, property taxes and insurance not covered by early-stage revenue. A deal can carry an adequate interest reserve and still fail on operating deficit, because operating cost begins at completion while revenue arrives over the absorption period.

The distinction matters because the two reserves respond to different errors. Underestimate the absorption period and the interest reserve runs out. Underestimate the operating cost of a partially occupied building and the operating deficit reserve runs out, which can happen even on schedule.

When either exhausts, the borrower funds debt service or operating cost out of pocket. Failure to do so is a default on a project that may be performing exactly as the market allows, which is the characteristic construction-loan failure: a timing failure rather than a performance failure.

The value gap, and why the feasibility study should find it first

A lender providing construction financing wants an appraisal in which the reconciled prospective value exceeds total project cost. Where it does not, where the completed property is worth less than it costs to build, the project has a value gap that has to be filled by equity, by a subsidy, or by not proceeding.

This is precisely the finding a feasibility study is designed to surface before the money moves, and it is a genuinely common outcome when construction costs have outrun rents.

The discipline is to run the comparison early and explicitly:

*Illustrative.*

A project in that position is not necessarily dead. It may be a build-to-suit where the sponsor accepts a thin margin for a strategic reason, or a first phase that unlocks a second. But it is a project where the equity requirement is larger than the sponsor assumed, and discovering that at appraisal rather than at feasibility means it is discovered after the design fees, the entitlement work and frequently the land purchase.

For the cost side of that comparison, the standard construction cost indices are the reference point rather than a contractor's letter: the Engineering News-Record construction and building cost indices, the Turner building cost index, RSMeans, and the producer price indices for construction inputs.

Entrepreneurial incentive, and why it is not entrepreneurial profit

These are treated as interchangeable in casual use and they are not, and the distinction matters specifically in prospective work.

Entrepreneurial incentive is the anticipated reward a developer expects for undertaking the project and carrying its risk. It is forward-looking, set before or at the start.

Entrepreneurial profit is the reward actually realised, measured after completion. It is extracted from the market retrospectively.

A prospective valuation looks forward to a future effective date, so incentive is the correct figure, because it is the amount that would motivate a developer as of that date. Profit can only be measured after the fact, and importing a realised figure into a forward-looking cost approach is a conceptual mismatch that a reviewer will catch.

Levels are commonly expressed as a percentage of total cost or of value, and vary with property type, risk, hold period and where the market sits in its cycle.

The feasibility connection is direct: entrepreneurial incentive is the required return discussed in a feasibility study, expressed in the vocabulary of the cost approach. If the feasibility study concluded a project clears an owner-operator's required return and the appraisal applies an institutional developer's incentive, the two documents have used different hurdle rates on the same project.

What the appraisal framework does with all this

Why one property produces three values

A stabilised, occupied building has one market value at one effective date. A proposed development does not, because the thing being valued does not yet exist and will pass through distinct states before it does.

The federal Interagency Appraisal and Evaluation Guidelines address this directly. A prospective market value may be appropriate for a property interest related to a credit decision on a proposed development or renovation project, and two prospective value opinions may be required to reflect the time frame during which development, construction and occupancy will occur.

Combined with the current condition of the site, that produces three numbers.

As-is. The market value of the property in its current condition on the current effective date. For a vacant site with a foundation poured, that is land plus whatever improvements are physically in place. This is a present-day value with a present-day effective date.

Prospective market value as-completed. The property's market value as of the time development is expected to be completed. Effective date: a specified future date.

Prospective market value as-stabilized. The property's market value as of the time the property is projected to achieve stabilised occupancy. Effective date: a later specified future date.

Stabilised occupancy has a technical meaning worth stating precisely: the occupancy level a property is expected to achieve after being exposed to the market for lease over a reasonable period of time at terms and conditions comparable to competitive offerings.

The Appraisal Institute's definition of a prospective opinion of value is worth keeping in mind throughout: it is a value opinion effective as of a specified future date. The term does not define a type of value. It identifies when the value is effective, not what kind of value it is.

The distinction almost everyone gets wrong

There is a difference between a prospective "upon completion" value and a hypothetical "as complete" value, and commercial appraisal review teams report encountering the confusion routinely.

Prospective, upon completion. The appraiser values the property as of a specified future date, relying on extraordinary assumptions: that construction will be completed as of that date, in accordance with the provided budget and plans, and that market conditions will not materially change between now and then.

Hypothetical, as complete. The appraiser values the property as of today, relying on a hypothetical condition that the construction is already finished, when the appraiser knows it is not.

These are different assignments producing different numbers, and they are not interchangeable.

The reason it matters practically: a hypothetical "as complete" value uses today's market conditions and today's rent levels. A prospective "upon completion" value must consider what market conditions and rent levels will be at the projected completion date, and must account for the time between now and then. On a project completing in eighteen months, those are materially different questions.

Which one a lender needs depends on the credit decision, and the appraiser cannot guess. This belongs in the engagement, meaning the scope of work discussion between lender, appraiser and borrower at the outset, not a correction after the report is delivered.

Extraordinary assumptions and hypothetical conditions

Both concepts are defined in USPAP and both must be disclosed, but they are not the same thing and they carry different requirements.

An extraordinary assumption is an assignment-specific assumption, as of the effective date, regarding uncertain information used in an analysis which, if found to be false, could alter the appraiser's opinions or conclusions.

A hypothetical condition is a condition, directly related to a specific assignment, which is contrary to what is known by the appraiser to exist on the effective date, but is used for the purpose of analysis.

The distinction in one line: an extraordinary assumption presumes something uncertain to be true. A hypothetical condition assumes something known to be false to be true.

An extraordinary assumption is necessary whenever a prospective value is reported. That is not a technicality. It is the mechanism by which the reader is told that the event underlying the value has not yet occurred, and that the number is a prospective value based on current market perspective rather than a prediction of the future.

Hypothetical conditions carry stricter requirements. Their use must be clearly required for legal purposes, for purposes of reasonable analysis, or for purposes of comparison, a higher bar than an extraordinary assumption has to clear.

For a borrower or lender reading a report, the practical reading is this: the extraordinary assumptions section tells you what has to be true for the value to hold. A report with a short, specific list of extraordinary assumptions is stronger than one with a long list of vague ones, because each assumption is a condition the value depends on.

Effective date is not report date

Three dates appear in a construction appraisal and they are frequently conflated: the date of inspection, when the appraiser physically visited; the date of report, when the report was signed and issued; and the effective date of value, the date to which the value opinion applies.

For an as-is value, the effective date is typically contemporaneous with inspection. For a prospective value, the effective date is in the future, subsequent to the date of the report. That is what makes it prospective.

This matters for two practical reasons. Appraisal validity periods run from the effective date, and lenders apply their own currency requirements. And the prospective effective date must be supportable: an appraiser projecting completion in twelve months when the construction schedule runs eighteen has produced a value effective at a date the project will not reach.

A fourth case: retrospective value

The article's three values all sit at or after the report date. There is a fourth effective-date case that completes the set and that borrowers encounter in circumstances they did not plan for.

A retrospective value opinion has an effective date prior to the date of the report. It is used in litigation, in estate and gift tax work where value is required as of a date of death or gift, in condemnation, in loss causation and diminution-in-value analysis, in bankruptcy and workout, and in tax appeals.

The discipline is that the opinion must reflect market conditions and information available as of the retrospective effective date. Data arising after that date may be considered where it confirms a trend a market participant could reasonably have anticipated, and its use must be disclosed, but it cannot be used to import hindsight that was unavailable on the effective date.

The reason it belongs in this article: a workout on a construction loan frequently requires a retrospective opinion as of the date the loan was made, and the question asked is whether the original prospective value was supportable on the information then available. That is a review of the absorption assumption, performed years later, by someone who now knows how it turned out.

Which value the lender actually uses

This is where borrower expectations most often diverge from reality.

As-is governs the collateral position during construction. The lender is advancing funds against a property that is not finished. Their exposure at any given moment is measured against what actually exists. Construction lenders monitor as-is value through the draw process precisely for this reason.

As-completed and as-stabilized inform loan sizing and the take-out. The lender wants to know whether the finished project will support the permanent debt, and whether it will do so before the interest reserve is exhausted.

For SBA and USDA transactions, the programme requirements and the participating lender's own policy determine which value the advance rate applies to.

Worth knowing alongside that: the appraisal threshold that applies to a bank transaction is not the threshold that applies to an SBA one. The banking thresholds below which an evaluation may substitute for an appraisal are materially higher than the level at which SBA requires an independent appraisal, so a transaction that would not need an appraisal at a bank may well need one under the programme.

The common borrower error is assuming the as-stabilized value, the largest of the three, sets the loan amount. It usually does not, and a capital stack built on that assumption comes up short.

Recertification at completion

The prospective value was based on extraordinary assumptions. Once construction is finished, those assumptions can be tested.

Standard practice, and lender expectation, is that upon completion and final inspection, confirming the workmanship is of expected quality and matches the plans on which the appraiser relied, a recertification of value from the original appraiser validates the original assumptions and estimates.

Recertification is not a new appraisal. It is a confirmation that the conditions the prospective value depended on were in fact satisfied. Where they were not, where the finished building differs materially from the plans, or where market conditions moved, a new appraisal may be required, and that is a timing and cost item worth anticipating rather than discovering at closing.

Common failures

Wrong value scenario ordered. A hypothetical "as complete" delivered where a prospective "upon completion" was needed, or the reverse. Resolvable at engagement, expensive afterwards.

Prospective effective date inconsistent with the construction schedule. The appraisal assumes completion at a date the project cannot reach.

Absorption borrowed from the wrong asset class. The characteristic error, and the one that moves the most money.

Absorption not deducted at all. As-completed and as-stabilized reported as effectively the same number on a project with a real lease-up period.

Interest reserve sized on the absorption assumption without testing it. A reserve that funds an eighteen month lease-up on a thirty month asset.

Operating deficit reserve omitted, so the deal is protected against debt service and not against operating cost.

Extraordinary assumptions that do more work than they should. A long list of vague assumptions is not caution; it transfers risk to the reader and weakens the conclusion.

Feasibility and appraisal disagreeing. Different absorption periods, different stabilised rents, different expense ratios in two documents in the same loan file.

Entrepreneurial profit used where incentive belongs.

Borrower sizing the capital stack on the largest number. As-stabilized is the value furthest in the future, carrying the most assumptions, and is frequently not the basis for the advance.

What a lender is reading for

On the feasibility side

Where did the absorption period come from? A demand analysis specific to this asset class and submarket, or a general rule of thumb?

Does the absorption assumption match the asset class, or was it borrowed from a faster one?

Do the appraisal and the feasibility study use the same absorption period, the same stabilised rents and the same expense ratios?

Is the interest reserve sized to the absorption period actually assumed, and is there an operating deficit reserve alongside it?

Does the reconciled prospective value exceed total project cost? If not, the equity requirement changes.

Is entrepreneurial incentive used rather than realised profit, and does the rate match the developer this project actually has?

On the appraisal side

Which value scenarios were developed, and were they the ones ordered?

What are the extraordinary assumptions, and are they specific? A short precise list is a better report than a long hedged one.

Is the prospective effective date consistent with the construction timeline?

Does the as-completed to as-stabilized gap reflect a real absorption period, with costs deducted?

Which value will the advance be sized against, and is the capital exemption test binding on this deal?

A construction appraisal with three values is not three opinions about the same thing. It is one property described at three points along a timeline, each with its own effective date and its own set of conditions attached. Reading it that way, and knowing which number the lender is actually working from, is the difference between a capital stack that closes and one that has to be rebuilt in week ten.

The feasibility discipline adds the part that decides it. The distance between two of those three points is an absorption period, and an absorption period is not something an appraiser can derive from comparable sales. It comes from a market study, or it comes from a rule of thumb, and the difference between those two sources is worth more than every other assumption in the report combined.

Frequently asked questions

Which of the three values does the lender actually use?

As-is governs the collateral position during construction, because that is what exists while funds are being advanced. As-completed and as-stabilized inform loan sizing and the take-out. The common borrower error is assuming as-stabilized, the largest of the three, sets the loan amount. It usually does not. Ask the lender which value they will size against before the appraisal is ordered.

What is the difference between a prospective value and a hypothetical one?

A prospective upon-completion value has an effective date in the future and assumes construction will be finished by then, using the market conditions expected at that date. A hypothetical as-complete value has an effective date of today and assumes the building is already finished when the appraiser knows it is not, using today's conditions. On an eighteen-month project those are materially different numbers, and which one is needed should be settled at engagement.

Why do as-completed and as-stabilized differ?

Because an absorption period sits between them. The property must be leased or its business ramped, incurring lease-up costs, carrying costs and the developer's required return along the way. The as-completed value discounts the as-stabilized value back across that interval. Where the two numbers are close together on a speculative project, the absorption period has probably not been properly deducted.

Where does the absorption assumption come from?

It should come from a demand analysis specific to the asset class and submarket, which is feasibility work rather than valuation work. Absorption varies enormously by asset class, from six months for pre-leased industrial to several years for a hotel ramp or a manufactured housing lot fill. Borrowing an assumption from a faster asset class is the characteristic error and it overstates value, under-sizes the interest reserve and understates the equity requirement at the same time.

Why does the appraisal affect how much equity I have to contribute?

Because the regulatory capital exemption for a construction exposure is generally tested partly against contributed capital measured as a percentage of the appraised as-completed value, not against cost. A project creating a lot of value therefore faces a larger dollar contribution requirement than a marginal one, which is counterintuitive. Where leverage is modest the test is not binding; where it is aggressive, it changes the capital stack.

What is a retrospective value opinion?

A value with an effective date before the report date, used in litigation, estate and gift tax work, condemnation, loss causation and workouts. It must reflect what was knowable at that earlier date. On a construction loan workout it frequently amounts to reviewing whether the original absorption assumption was supportable on the information available when the loan was made.

*Prepared by UnionMetric Appraisal & Feasibility. This article describes general appraisal practice and regulatory framework and is not a substitute for the specific requirements of your lender, programme or jurisdiction. Appraisal standards and regulatory guidance are periodically revised; confirm current requirements before relying on any detail. Last updated: July 31, 2026.*

*Absorption ranges, reserve sizing, capital treatment and worked examples in this article are illustrative frameworks and require calibration to the subject property, asset class and lender. Regulatory capital rules governing construction exposures were amended following the statutory change in 2018; confirm the operative rule and its current thresholds before applying them to a transaction.*