Adaptive reuse costs on a historic industrial building come down to a handful of big line items: the roof, the structure, electrical, and the tenant buildout. On one 43,000 square foot building at the Peerless Mill, the roof alone is about $400,000, and the plan only works because our basis stays around $30 a foot, a fraction of what it would cost to build new.
We bought the Peerless Mill about four years ago with a group of partners. It's 32 acres, 29 buildings, and about 1.5 million square feet. In a recent video, I walked through the real adaptive reuse costs and budget on one of those buildings, Building 21, with the partner who's taking it on. Here's what we're spending, why, and how the numbers pencil.
Watch: Renovating Historic Industrial Buildings: Real Costs and Budget
The deal behind the renovation
Building 21 is about 43,000 square feet with roughly 2.5 acres of yard that can work as a laydown yard for industrial outdoor storage. We're selling it for $500,000 into a new partnership with Dave Codrea and the Greenleaf team. I'm a partner on both sides of that deal, which is a big reason it makes sense to me (I want the building fixed, and I want the mill to win).
Why sell a building out of the larger project? The biggest raise I've done is about $8.5 million. I can't go raise $100 million to renovate the whole mill myself, so bringing in strategic partners building by building is how this project actually gets done. If you're curious about the background, here's the Peerless Mill revitalization story and the 2026 update on the mill.
The biggest adaptive reuse cost line items
Where the money goes on Building 21
- Roof. A new roof runs about $400,000, and it's the single biggest number in the budget.
- Decking. We budgeted to replace about 20% of the roof decking. If it turns out to be 25%, that line grows by a quarter.
- Electrical. A basic package up front, with more of it covered in tenant improvements later.
- Demising. Splitting the building into suites a tenant can actually use.
- Contingency. Renovations almost never come in under budget, so plan for that.
On the roof, we got three bids on the same scope. That's the only way to compare apples to apples, and with old buildings the gap between bids can be huge. And you can't know how much decking is rotten until the old roof comes off, which is why the contingency matters so much.
Why the layout drives the budget
This building has columns on a roughly 20 to 25 foot grid, so every bay is about 400 to 500 square feet. That's a big deal for leasing. A simple rectangle with a regular column grid is easy to demise into smaller suites, and every suite can have its own door to the outside.
I try hard to avoid common area in these buildings. Hallways and shared space cost money to build and maintain, and nobody pays rent on them. Tenants today also want space that's turnkey, so the budget has to include enough buildout to get someone moved in. Here's more on tenant improvement allowances and what commercial build-out includes.
How the adaptive reuse numbers pencil
We're buying at about $11 a foot and investing about $20 a foot, which puts the basis around $30 a foot. That lets us go to market at a half to a third of what new space rents for. Dave's math was that around $4.50 a foot in rent covers everything and still produces better than a 10% return.
The income comes from two places. The yard can lease for about $3,000 an acre per month, or about $7,500 a month and $90,000 a year. The building can lease for about $2 a foot net. My working number for the property is NOI of about $160K a year on a net lease, where the tenant takes care of things like utilities and landscaping. At an 8 cap, that's a building worth about $2 million, with about $1.5 million in it. For comparison, rebuilding it from scratch would cost about $4 million.
Building 21 at a glance
That gap between basis and replacement cost is the whole thesis of adaptive reuse. If you can get in cheap enough, you can rent for less than anyone building new and still make a strong return. Leasing brokers will handle the suites, and the yard plays into demand for industrial outdoor storage.
What happens next
We expect construction to start at the end of 2026 or early 2027. Elsewhere at the mill, the self-storage building is waiting on EPB to redo a transformer pad before it can open, which is a good reminder that utilities set the schedule on these projects as much as contractors do. If you want to understand how projects like this get funded, here's my breakdown of the capital stack.
Frequently asked questions
How much does adaptive reuse cost?
It depends on the building, but the big line items are usually the roof, structural repairs like decking, electrical, demising, and tenant buildout. On Building 21 at the Peerless Mill, we're investing about $20 a foot on top of an $11 a foot purchase, for a basis around $30 a foot.
Is adaptive reuse cheaper than new construction?
It can be. Building 21 would cost about $4 million to rebuild from scratch, and we'll have about $1.5 million in it. That gap between basis and replacement cost lets us rent for less than new space and still make a strong return.
What is the biggest cost in renovating an old industrial building?
On this project it's the roof, at about $400,000. You also can't know how much roof decking is rotten until the old roof comes off, which is why a contingency line matters.
Are there tax incentives for renovating a historic building?
Some historic buildings qualify for the federal historic tax credit. The National Park Service explains the rules on its Historic Preservation Tax Incentives page. Talk to your CPA before you count on it in your underwriting.
Follow the Peerless Mill renovation as it happens on my YouTube channel.
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