The standard for AI in office acquisitions

Reforecasting an office acquisition after a 20,000-square-foot giveback

This article works through a 312,000-square-foot office acquisition after the anchor tenant signs a renewal for 42,000 of its 62,000 square feet. It shows how the contraction, free rent, tenant improvements, expense-base reset and downtime change cash NOI, debt sizing and required equity even though the tenant renewed.

Office acquisitions Worked re-underwrite 15 minute read

A renewal probability collapses several outcomes that stop being interchangeable once an amendment is signed. A tenant can renew and still return a floor, reset its expense base year, receive more free rent and consume more landlord capital per retained square foot. Recording that outcome as “renewed” resolves the probability and loses the economics.

Here, the anchor renewal was already included in the acquisition case. The signed amendment improves the starting rent by $1.00 per square foot and extends the tenant for ten years. It also removes 20,000 square feet from the premises, adds four months of free rent, increases the allowance on the retained space and replaces a 2013 expense base with a 2027 base year. The amendment is not better or worse because one of those terms moved. Its effect appears only after all of them occupy the same cash flow.

The following case is illustrative rather than client data. The purchase price is $126 million. The quoted senior loan is the lower of 60% LTV and a 10.25% minimum Year 1 debt yield, with interest-only debt service at 6.25%. The acquisition closes September 30, the existing anchor lease expires December 31 and the amendment begins January 1.

The acquisition case before the amendment

The initial model carries a full-space renewal. The anchor retains 62,000 square feet for ten years at $54.00 per square foot with 2.5% annual increases, ten months of free rent, an $85-per-square-foot tenant-improvement allowance and an $8 per square foot commission. The leasing memo also carries the existing recovery structure, so the model retains the 2013 expense base and the current recovery amount.

That case keeps the building 91.0% leased after the December expiry. Two months of anchor cash rent fall into Year 1 after the ten-month abatement, contributing $558,000. The old expense base contributes another $341,000 of recoveries. With $8.950 million of base rent from the other tenants, the initial case produces $8.400 million of Year 1 cash NOI.

The signed amendment changes that case without changing the tenant's identity or the lease-expiration date. The tenant retains 42,000 square feet at $55.00, receives 14 months free and a $95-per-square-foot allowance, and surrenders 20,000 square feet at expiry. The retained premises use a 2027 expense base. The returned floor requires demising work before it can be marketed as a separate suite.

Case after the lease expiry

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Underwriting lineInitial caseSigned caseMovement
Anchor renewal area62,000 sf42,000 sf−20,000 sf
Building leased after expiry91.0%84.6%−640 bps
Year 1 cash NOI$8.400M$7.500M−$0.900M
Modeled leasing exposure$8.556M$11.042M+$2.486M
Day-one loan proceeds$75.600M$73.171M−$2.429M

What the signed renewal changes

The retained 42,000 square feet and the returned 20,000 square feet separate on January 1. The renewal rent, abatement, allowance and commission apply only to the retained premises. The surrendered space becomes vacant inventory with a different market rent, downtime, free-rent package, allowance and commission. Blending the two areas into a revised anchor rent hides both cash-rent commencement dates.

The base-year reset is applied on the same date. Under the existing lease, the tenant pays the increase in operating expenses above a $12.50-per-square-foot 2013 base. At the current $18.00 expense level, that produces $341,000 across 62,000 square feet. The amendment resets the retained premises to a 2027 base, so the Year 1 recovery is zero. The giveback produces no recovery while vacant.

The replacement case for the giveback assumes 12 months to lease execution and delivery, followed by eight months free at $53.00 per square foot, $110 per square foot of tenant improvements and an $11-per-square-foot commission. Cash rent begins in month 21. The assumptions remain separate from the signed amendment: one is a contractual obligation and the other is the acquisition team's leasing case.

Lease economics carried into the model

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Lease termInitial renewalSigned renewalGiveback case
Renewal area62,000 sf42,000 sf20,000 sf
Starting base rent$54.00 / sf$55.00 / sf$53.00 / sf assumed
Free rent10 months14 months8 months assumed
Tenant improvements$85 / sf$95 / sf$110 / sf assumed
Leasing commission$8 / sf$10 / sf$11 / sf assumed
Expense recovery2013 base year retained2027 base yearNone while vacant
Cash-rent commencementMonth 11Month 15Month 21 assumed

Rebuilding Year 1 cash NOI

The initial case receives two months of anchor base rent after the ten-month free period. The signed case receives none: the 14-month abatement extends beyond Year 1, and the giveback remains in downtime. Anchor and giveback base rent therefore moves from $558,000 to zero. This is a cash-NOI treatment; straight-line rent does not fund debt service or the tenant-improvement draws during the abatement.

The $341,000 recovery attached to the old base year also leaves Year 1. The operating expense line declines by $61,000 because the vacant floor no longer incurs the same occupied janitorial, electricity and after-hours service load. That saving does not offset the lost recovery. Parking and other income falls by $62,000 after the spaces assigned to the surrendered premises are returned.

The other tenants remain unchanged. Their $8.950 million of base rent and $2.850 million of recoveries provide the fixed part of the bridge. With the revised anchor and giveback treatment, effective gross income falls by $961,000 and cash NOI falls by $900,000, from $8.400 million to $7.500 million.

Year 1 cash-NOI reconciliation

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Cash-flow lineInitial caseSigned caseMovement
Base rent — other tenants$8.950M$8.950M
Base rent — anchor and giveback$0.558M−$0.558M
Recoveries — other tenants$2.850M$2.850M
Recoveries — anchor and giveback$0.341M−$0.341M
Parking and other income$1.050M$0.988M−$0.062M
Effective gross income$13.749M$12.788M−$0.961M
Operating expenses($5.349M)($5.288M)+$0.061M
Year 1 cash NOI$8.400M$7.500M−$0.900M

Funding the renewal and the giveback

The smaller renewal does not produce a proportionate reduction in landlord exposure. The initial full-space case carries $5.270 million of tenant improvements, a $496,000 commission and $2.790 million of free rent. The signed renewal reduces those amounts on the retained premises, but the giveback creates a second leasing event with its own capital and carry.

At the base assumptions, the returned floor requires $2.200 million of tenant improvements, a $220,000 commission and $707,000 of free rent. Demising the floor adds $450,000. Twelve months of unrecovered operating expense during downtime adds $360,000. Total modeled leasing exposure rises from $8.556 million to $11.042 million.

These amounts do not occur on one date. The renewal commission is due at execution; the allowance follows the work-letter requisitions; demising work precedes delivery of the contraction space; free rent and vacancy carry appear month by month. The monthly sources and uses therefore needs the lease dates and draw conditions, not only the total allowance per square foot.

Leasing and carry exposure

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Lease-cost lineInitial caseSigned caseMovement
Renewal tenant improvements$5.270M$3.990M−$1.280M
Renewal leasing commission$0.496M$0.420M−$0.076M
Renewal free rent$2.790M$2.695M−$0.095M
Giveback tenant improvements$2.200M+$2.200M
Giveback leasing commission$0.220M+$0.220M
Giveback free rent$0.707M+$0.707M
Demising work and vacancy carry$0.810M+$0.810M
Total modeled leasing exposure$8.556M$11.042M+$2.486M

Carrying the amendment into loan proceeds and equity

At the $126 million purchase price, the initial $8.400 million of cash NOI produces a 6.67% going-in cash cap rate. The $75.600 million loan is constrained by 60% LTV and has an 11.11% debt yield. At 6.25% interest-only debt service, DSCR is 1.78×.

The revised $7.500 million of cash NOI produces a 5.95% cash cap rate. At the same loan amount, debt yield is 9.92%, below the quoted 10.25% minimum. Debt yield now sizes proceeds at $73.171 million, adding $2.429 million to purchase-price equity. Combined with the $2.486 million increase in leasing exposure, the modeled capital behind the purchase price and identified leasing work increases by $4.915 million.

The signed renewal is still valuable. It secures 42,000 square feet for ten years and removes the binary risk of a full 62,000-square-foot vacancy. What it does not do is preserve the original revenue, recovery or capital case. The underwriting changes because the renewal resolved into a different set of lease economics than the probability-weighted line it replaced.

Capital effects at the same purchase price

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Model outputInitial caseSigned caseMovement
Year 1 cash NOI$8.400M$7.500M−$0.900M
Going-in cash cap rate6.67%5.95%−72 bps
Debt yield at 60% LTV11.11%9.92%−119 bps
Day-one loan proceeds$75.600M$73.171M−$2.429M
Interest-only DSCR after sizing1.78×1.64×−0.14×
Equity to purchase price$50.400M$52.829M+$2.429M
Price equity plus leasing exposure$58.956M$63.871M+$4.915M

The amendment is fixed; the re-leasing case is not. Delivering the contraction space in six months rather than 12 reduces vacancy carry and brings cash rent forward. A 24-month delivery assumption does the opposite and requires a higher allowance and longer free-rent package. Each treatment begins with the same 20,000-square-foot giveback rather than changing the signed renewal to make the scenario work.

Alternate giveback treatments

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CaseGiveback treatmentCash rentGiveback exposureTotal exposure
Base case12 months to delivery; 8 months free; $110 / sf TI; $11 / sf LCMonth 21$3.937M$11.042M
Earlier re-lease6 months to delivery; 6 months free; $100 / sf TI; $10 / sf LCMonth 13$3.360M$10.465M
Prolonged downtime24 months to delivery; 10 months free; $120 / sf TI; $12 / sf LCMonth 35$4.677M$11.782M

Reworking the case in Cap Orbit

Cap Orbit can work across the current rent roll, suite schedule, original lease, prior amendments, signed renewal, work letter, operating-expense reconciliations, recovery statements, parking schedule, leasing budget, debt quote and existing acquisition workbook in the same deal. The retained premises and the contraction space can be separated at the surrender date without losing the terms that governed the original 62,000 square feet.

Source-to-model reconciliation

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Current sourceModel treatment
Current rent roll and suite scheduleOccupied area, current rent and post-expiry leased percentage rebuilt
Original lease and prior amendmentsCurrent base rent, expense base year, premises and expiry established
Signed renewal amendment and work letterRetained area, surrender date, free rent, TI and recovery reset carried
Operating-expense and recovery statementsOld-base recoveries removed and post-renewal recoveries recalculated
Leasing budget and broker assumptionsGiveback downtime, market rent, free rent, TI, LC and demising work modeled
Debt quote and acquisition workbookCash NOI carried through debt yield, proceeds, DSCR and equity

From there, you can have Cap Orbit rebuild the post-expiry suite schedule, carry the abatement and tenant-improvement draws on their actual dates, remove the old-base recoveries, create the 20,000-square-foot giveback case and update the monthly debt and equity cash flow in the existing model. The signed area, starting rent, base year, free-rent period and allowance retain their source trace. Downtime, market rent, TI, LC and demising cost remain visible underwriting assumptions.

The same deal record supports the giveback cases that matter here: deliver the space in six, 12 or 24 months; divide it into smaller suites; change the market package; or carry it vacant through the hold. Each case starts from the signed contraction and returns the same connected outputs—leased area, cash-rent commencement, recoveries, leasing exposure, cash NOI, debt yield, loan proceeds and required equity.

That is the standard for AI on this asset class. The useful result is not a lease abstract that says the anchor renewed. It is an acquisition case in which the retained premises, returned floor, recovery reset and landlord obligations resolve into the same monthly cash flow and capital structure.