Underwriting the value-add: reno budgets and rent premiums

Value-add sounds clean in a deck: renovate units, raise rents, improve NOI, create value.

In real life, the important question is uglier: how much cash goes into each unit, how much rent comes out, how long does it take, and what happens when tenants do not cooperate?

The model sees identical boxes moving through a line. Operations sees occupied units, different scopes, vendor schedules, permits, surprises, and a leasing clock charging rent for every idle day.

Start with one unit, not forty promises

Suppose a classic unit can be renovated for $9,500 and rented for $175 more per month.

Annual rent premium:

$175 x 12 = $2,100

Simple payback:

$9,500 / $2,100 = 4.5 years

That is before vacancy during renovation, leasing concessions, maintenance surprises, financing costs, and the fact that not every unit turns when the model wants it to.

The $9,500 leaves now. The $175 returns one month at a time after the unit is finished and leased. Simple payback hides that timing friction, so put the renovation draw schedule beside the leasing schedule before calling 4.5 years the answer.

The budget needs parts and measurements

Budget line	Evidence
Interior scope	Written scope by unit type
Labor and materials	Contractor bids or actual invoices
Contingency	Explicit percentage or dollar reserve
Make-ready time	Turn schedule from manager
Rent premium	Signed renovated leases or tight comps

“Light reno” is not a budget. It is a mood.

Ask whether the scope includes demolition, labor, materials, appliances, flooring, fixtures, permits, waste, overhead, vacancy, and change orders. Then find the contingency as an actual number. A budget without one assumes every wall will behave when opened. Walls enjoy that joke more than owners do.

Do not force the rent through the machine

Item	Amount
Current classic rent	$1,225
Proven renovated rent	$1,375
Underwritten premium	$150
Sponsor pitch premium	$225

The $225 premium might happen. But if the proven premium is $150, the extra $75 is not evidence yet. Across 40 units, that extra $75 is $36,000 of annual NOI before expenses.

At a 6.0% cap rate, that unsupported slice represents:

$36,000 / 0.06 = $600,000

Small rent premiums can become big valuation claims. A loose $75 input has been geared into $600,000 of supposed value before anybody signs the lease.

Check renovated leases, tenant ledgers, concessions, bad debt, lease dates, and first collected payments. A rent comp supports possibility. A paying resident supports performance.

Add friction before trusting throughput

Build a renovation tracker before trusting the full plan:

Unit type	Units	Cost/unit	Proven premium	Payback
1x1	20	$8,000	$125/mo	5.3 yrs
2x1	30	$9,500	$150/mo	5.3 yrs
2x2	10	$12,000	$200/mo	5.0 yrs

Then cut the premium by 25% and add 15% to cost. If the plan still makes sense, you may have something worth studying. If it collapses, the renovation budget was wearing a cape.

Before you trust the plan, ask:

• How many units can be vacant and under construction at once without straining cash?
• Which unit types have actually achieved the premium, and with what concessions?
• Who approves change orders, and where is the spending limit?
• Does the budget include downtime, financing carry, and contingency?
• What happens to payback and value after the premium cut and cost increase?

Inspect the last ten units off the line

Ask for the last ten completed unit turns: cost, scope, downtime, old rent, new rent, and lease date. Add invoice totals, concessions, and first collected payment if they are available. That table teaches more than a page of value-add poetry.

Build the same tracker for the next ten turns and update budget versus actual after each one. If the line slows, costs rise, or premiums weaken, reduce the pace before forty projected units turn one small miss into a capital problem.