The standard for AI in affordable-housing acquisitions

Underwriting affordable housing before post-rehab rents become effective

This article works through a 180-unit RAD acquisition whose model starts post-rehab HAP rents on July 1 while the current completion record makes them effective November 1. It follows the approval trigger, voucher status and abatements through Year 1 NOI, permanent debt and $1.706 million of additional equity.

Affordable-housing acquisitionsWorked re-underwrite15 minute read

A post-rehab rent schedule can be final and still not be current revenue. The HAP exhibits can state both the pre-rehab and post-rehab contract rents while the conversion documents make the new schedule effective only after full completion, owner certification and approval. Unit completion alone does not change the voucher rate.

That is the issue here. Exhibit 1A produces $215,400 of monthly pre-rehab contract rent. Exhibit 1B produces $258,000 after rehab. The initial case starts the higher amount on July 1. The current completion certification is approved October 15, making the post-rehab schedule effective on the first day of the following month.

The following case is illustrative rather than client data. The purchase price is $22 million. The permanent loan is the lower of 65% LTV and a 9.5% minimum Year 1 debt yield, with interest-only debt service at 5.75%. Twelve units also have subsidy abatements in the current voucher file.

The acquisition case before completion approval

The initial case carries six months of pre-rehab contract rent and six months of post-rehab rent. Scheduled HAP contract rent is $2.840 million. After $60,000 of abatement and collection loss, $220,000 of resident and other revenue and $1.450 million of operating expense, Year 1 NOI is $1.550 million.

The approved-effective case carries ten months of pre-rehab rent and two months of post-rehab rent. It then uses the current voucher, tenant ledger and abatement report rather than applying a general collection factor to the scheduled contract amount.

Scheduled contract rent falls by $170,400. Abatement, collection loss and resident charges reduce revenue by another $144,000, while operating expense increases by $40,000. Year 1 NOI falls by $354,000.

Case after completion approval

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Underwriting lineInitial caseApproved-effective caseMovement
Post-rehab rent effective dateJuly 1November 1+4 months
Scheduled HAP contract rent$2.840M$2.670M−$0.170M
HAP abatement and collection loss($0.060M)($0.135M)−$0.075M
Year 1 NOI$1.550M$1.196M−$0.354M
Permanent loan proceeds$14.300M$12.594M−$1.706M
Required purchase-price equity$7.700M$9.406M+$1.706M

Rebuilding contract rent from the HAP exhibits

Exhibit 1A contains the current pre-rehab schedule by bedroom type. Seventy-two one-bedroom units produce $75,600 per month, 84 two-bedroom units produce $105,000 and 24 three-bedroom units produce $34,800.

Exhibit 1B increases the monthly amounts to $90,000, $126,000 and $42,000. The total increase is $42,600 per month. Both schedules remain attached to the same 180 contract units; the approval record determines which schedule is effective for a given voucher month.

The rent schedule is not rebuilt from tenant payments alone. The HAP contract establishes total contract rent, while the tenant certification and utility allowance determine the split between resident payment and subsidy. That split is reconciled separately to the monthly voucher and tenant ledger.

Pre- and post-rehab HAP contract rents

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Contract unit typeUnitsExhibit 1A monthly rentExhibit 1B monthly rentMonthly increase
One-bedroom72$75,600$90,000$14,400
Two-bedroom84$105,000$126,000$21,000
Three-bedroom24$34,800$42,000$7,200
Total monthly contract rent180$215,400$258,000$42,600

Rebuilding the rent trigger from the completion record

The initial model uses a May 31 construction completion date and assumes approval before the June voucher cutoff. The current unit and draw records show physical completion on August 28. The owner submits the completion certification on September 6.

The review identifies corrections and missing supporting documents, completed October 8. Approval follows on October 15. Under the current HAP treatment, the post-rehab schedule becomes effective November 1, not on physical completion, submission or the date of the last unit draw.

This sequence preserves the distinction between construction completion and rent approval. A change in the draw schedule moves the forecast only when it also moves the certification, correction and approval dates that control the effective voucher month.

Completion-to-rent approval schedule

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Rehab and approval milestoneInitial caseCurrent recordRent effect
Physical work completeMay 31August 28Completion package cannot precede full rehab
Owner completion certification submittedJune 5September 6Post-rehab rent remains unavailable
Corrections and supporting documents completeJune 20October 8Approval review continues
Completion certification approvedJune 25October 15Approval establishes the rent trigger
Post-rehab rent effectiveJuly 1November 1First day of month following approval

Carrying approved rents and voucher status into NOI

Ten months of pre-rehab rent produce $2.154 million. Two months of post-rehab rent produce $516,000. Scheduled HAP contract rent is therefore $2.670 million in the approved-effective case.

The monthly voucher is then reconciled by unit. Twelve units carry current abatements; tenant payments, subsidy, retroactive adjustments and collection status are assigned to their actual months. Abatement and collection loss reaches $135,000 rather than the $60,000 in the initial case.

Total property revenue is $2.686 million. Operating expense is $1.490 million after extending the compliance, security and construction-closeout costs in the current records. Year 1 NOI is $1.196 million.

Year 1 revenue and NOI reconciliation

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Model lineInitial caseApproved-effective caseMovement
Pre-rehab contract rent$1.292M$2.154M+$0.862M
Post-rehab contract rent$1.548M$0.516M−$1.032M
Scheduled HAP contract rent$2.840M$2.670M−$0.170M
HAP abatement and collection loss($0.060M)($0.135M)−$0.075M
Resident charges and other revenue$0.220M$0.151M−$0.069M
Total property revenue$3.000M$2.686M−$0.314M
Operating expenses($1.450M)($1.490M)−$0.040M
Year 1 NOI$1.550M$1.196M−$0.354M

Carrying approved-effective NOI into permanent debt

At the $22 million purchase price, the initial NOI produces a 7.05% going-in yield. The $14.3 million permanent loan is constrained by 65% LTV and opens at a 10.84% debt yield.

The approved-effective NOI produces a 5.44% yield. At 65% LTV, debt yield falls to 8.37%, below the 9.5% minimum. The debt-yield constraint sizes proceeds at $12.594 million, $1.706 million below the initial case. Purchase-price equity increases to $9.406 million.

Alternate cases move a specific part of the approval chain. Earlier completion review makes the post-rehab schedule effective September 1. An abatement-cure case restores the twelve affected units without moving the contract-rent date. A year-end approval leaves all post-rehab rent outside Year 1.

Capital effects at the same purchase price

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Model outputInitial caseApproved-effective caseMovement
Year 1 NOI$1.550M$1.196M−$0.354M
Going-in NOI yield7.05%5.44%−161 bps
Debt yield at 65% LTV10.84%8.37%−247 bps
Permanent loan proceeds$14.300M$12.594M−$1.706M
Interest-only DSCR after sizing1.88×1.65×−0.23×
Purchase-price equity$7.700M$9.406M+$1.706M
Alternate approval treatments

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Approval caseTreatmentPost-rehab rent effectiveYear 1 NOILoan
Approved-effective baseOctober 15 approval; current abatement and collection fileNovember 1$1.196M$12.594M
Earlier approvalComplete correction package in August and obtain approval August 15September 1$1.282M$13.491M
Abatement curedAll twelve affected units pass correction review before the next voucherNovember 1$1.245M$13.105M
Year-end approvalCompletion approval moves to December; post-rehab rents begin next yearJanuary 1$1.111M$11.697M

Reworking the case in Cap Orbit

Cap Orbit can work across the HAP contract, Exhibits 1A and 1B, RAD conversion commitment, completion requirements, draw schedule, unit completion log, inspection record, completion certification, approval correspondence, TRACS voucher, tenant ledger, abatement report, permanent-loan quote and existing acquisition model in the same deal.

Source-to-model reconciliation

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Current sourceModel treatment
HAP contract and Exhibits 1A and 1BContract units, pre-rehab rents and post-rehab rents established by bedroom type
RAD conversion commitment and completion requirementsWork and documentation required before post-rehab approval identified
Draw schedule, unit completion log and inspection recordPhysical completion and correction dates rebuilt from current evidence
Completion certification and approval correspondenceApproval date carried to first permitted post-rehab voucher month
TRACS voucher, tenant ledger and abatement reportScheduled contract rent separated from current subsidy and collection loss
Permanent-loan quote and acquisition modelApproved-effective NOI carried through debt yield, proceeds and equity

From there, you can have Cap Orbit rebuild the approval chain, apply the correct HAP exhibit by voucher month, reconcile tenant and subsidy payments by unit and update revenue, operating costs, NOI, debt yield, permanent proceeds and equity in the existing model.

The same deal record supports the cases that matter here: a different completion-approval date, correction of specified abated units, delayed documents or post-rehab rents beginning next year. Each case returns the same connected outputs—effective HAP schedule, voucher revenue, collection loss, NOI, permanent debt and equity.

The standard for AI on this asset class is an approval-effective case in which contract exhibits, physical completion, subsidy status and permanent financing resolve into the same monthly revenue schedule.