The condition report looked clean. Repair estimates were modest, nothing was flagged as urgent, and the deal closed on time.
Within the first year, the roof required full replacement, a chiller failed during the first heat wave, and the electrical service was undersized for the incoming tenant.
That does not mean the assessment was incorrect. In most cases, it delivered exactly what was in scope. The issue is that buyers often treat a condition report as a forecast, when it is only a snapshot in time.
This distinction matters more as the building stock ages. According to the U.S. Energy Information Administration, the median U.S. commercial building was built in 1982, and 46% were built before 1980.
Many buildings changing hands today are operating major systems at or beyond their expected service life. This is exactly where a standard walkthrough and age table provide the least certainty.
The gap between the report and the building’s actual needs often appears as unplanned first-year capital spending that was never priced into the deal.
Here is where that gap comes from, and how to close it before you commit.
What a standard condition assessment covers, and what it doesn’t
Most commercial condition assessments follow ASTM E2018, the industry’s baseline standard. The current version, E2018-24, took effect on January 1, 2024. It’s useful and widely accepted, but it is limited by design.
The standard itself acknowledges that the baseline process carries a moderate level of uncertainty and is not meant to be technically exhaustive.
A typical assessment is a visual, non-invasive walkthrough. The assessor observes major systems, reviews available documents, interviews the property contact, and estimates remaining useful life based mostly on equipment age and typical service life.
Cost opinions usually come from general cost data.
There’s also a dollar filter. Conditions that would cost less than a set threshold, typically $3,000, are left out of the report. Each one may be small, but across a building, dozens of them add up to a real first-year budget line.
What a baseline assessment usually does not include, unless you add it to the scope:
- Destructive or invasive testing, such as roof cores, opening walls, or scoping drain lines.
- Performance testing of mechanical and electrical systems under load.
- A detailed review of code compliance or accessibility.
- Environmental review, which is handled separately in a Phase I.
- An evaluation of whether the building can support your plan for it.
The scope can differ widely. One assessment firm describes a buyer who had ordered a lighter report on an older seven-story commercial building with an underground parking garage. A more in-depth acquisition-level assessment found $4.5 million of remaining work on the garage alone, and the buyer walked away from the deal.
You get the scope you pay for. The key is to select that scope deliberately, based on the asset and your business plan, rather than assuming the standard package covers your risk.
Seven things buyers commonly miss
1) Remaining useful life based on age, not use
Two rooftop units installed the same year can be in very different condition. One ran on a reasonable schedule with regular maintenance. The other ran long hours in a hot climate and missed a service cycle every year.
On paper, both have the same remaining life.
That’s because most condition assessments estimate remaining life from benchmark tables.
ASHRAE, the industry’s main HVAC standards body, puts the median service life of a commercial rooftop unit at 15 years. But a median is only the midpoint.
In ASHRAE’s own service life database, rooftop units still in operation range from 3 to 37 years old. Age tells you where a unit sits on the benchmark, not how much life it actually has left.
Age-based estimates are a starting point. Maintenance records, run hours, and service history tell you how much life is actually left.
This matters even more going into a season of sustained heat, which pushes aging equipment past the point where repair still makes sense.
2) What’s behind the surface
Some of the most expensive problems in a building are the ones a walkthrough can’t see:
- Wet roof insulation under a membrane that looks intact.
- Failed flashing at a parapet.
- Corroded plumbing below the slab.
- Envelope leaks patched from the inside for years.
Targeted testing costs little compared with what it protects, and each of these has a matching test:
- Infrared roof scans to map trapped moisture across the roof.
- Core cuts to confirm insulation condition and roof layers at suspect areas.
- Camera inspections of drain lines to find corrosion, breaks, and blockages below the slab.
- Moisture readings at known trouble spots to check walls, parapets, and window openings.
Together, they turn an assumption into a documented number before closing.
3) The building’s operating history
A walkthrough shows you a building on one day. Its operating records show you the last two years.
Request 24 months of work orders, service call logs, utility bills, and preventive maintenance records. Look for recurring issues, after-hours emergency calls, unexplained energy increases, and missed maintenance.
Patterns in this data often clearly indicate systems nearing end of life, and they rarely appear in a standard condition report.
Utility data deserves particular attention. Pacific Northwest National Laboratory estimates that 10% to 30% of the energy used in commercial buildings is wasted through improper operation, and that the same operating and maintenance gaps also shorten equipment life.
A building with unexplained energy creep often has systems that are wearing out faster than their age suggests.
The upside is that many of these issues are fixable, often cheaply. A Lawrence Berkeley National Laboratory study of commissioning projects in about 1,500 North American buildings found that correcting operational problems in existing buildings paid for itself in a median of 1.7 years, with median energy savings ranging from 5% to 14% depending on how the work was done.
Nearly half of the corrective measures were simple schedule and setpoint changes. For buyers, poor operating history is both a risk to price into the deal and an opportunity to create value after closing.
If the seller can’t produce these records, that tells you something too.
4) Capacity versus your business plan
A building can work well for its current tenants and still fail to support what you plan to do with it.
A standard assessment measures the building against its current use. If your plan involves a lab conversion, a medical tenant, higher occupancy, heavier industrial operations, or any use change, measure the building against that plan.
The questions shift from whether it is in good condition to whether it can support your business plan, and what it will cost to get there.
Each plan stresses different parts of the building:
The gaps that cost the most are usually the hardest to fix after closing: electrical service that requires a utility upgrade with a long lead time, floor-to-floor heights too low for the ductwork the new use needs, or a structure that can’t take the added load without reinforcement.
Any one of these can turn a straightforward conversion into a major capital project.
The solution is straightforward but often missed: bring your business plan into due diligence. Share the intended use with the assessment team, request structural drawings and MEP as-builts, confirm available utility capacity, and have an engineer verify the critical numbers before you commit.
5) Cost estimates that don’t match the current market
General cost data often lags behind local market conditions. Labor rates, material prices, and contractor availability vary widely, and national averages can understate actual costs.
This year, the lag is especially wide. According to Associated Builders and Contractors’ analysis of federal producer price data, construction input prices rose more in the first four months of 2026 (6.2%) than over the prior three years combined (4.8%).
As of August, nonresidential construction inputs were 8.8% higher than a year earlier, and prices for switchgear, copper wire and cable, and iron and steel were each up more than 10%.
A cost opinion built on last year’s data can be outdated before the deal closes.
Lead times matter as much as price. Much of the electrical equipment commercial buildings depend on is now competing for factory capacity with data centers and utility projects:
A replacement that seems routine in a report can become months of temporary equipment rental and extended tenant disruption if you don’t account for procurement time.
Two practical steps close most of this gap: For any major system flagged as near end of life, get current quotes or budget pricing from local contractors, not just the assessment’s cost opinion. For long-lead equipment, build the procurement timeline into your first-year capital plan.
The clock starts when you order, not when the equipment fails.
6) Obligations you inherit at closing
When you buy the building, you also take on its contracts, and not all of them help you.
Research from World Commerce & Contracting, which studies contract performance across industries, finds that organizations lose an average of 11% of procurement contract value after signing.
Two of the largest drivers are renewal costs from poor planning ahead and scope changes that were never formally recorded, each accounting for roughly 2% to 3% of lost value. Building service contracts are prone to both. Agreements often renew automatically year after year, and their scope drifts away from what the building actually needs.
Before closing, review four areas:
- Service agreements: check for automatic renewals, termination terms, and scopes that don’t match what the building needs.
- Warranties: confirm which equipment and roof warranties transfer to a new owner and on what conditions. Some manufacturers require an inspection or fee before a warranty transfers.
- Leases: determine who is responsible for repairing and replacing major systems, because that decides who pays for the findings.
- Permits and inspections: look for open permits or unresolved inspection items that become your responsibility after closing.
Due diligence is the one point where all of these are still negotiable. After closing, they’re yours.
7) Obsolete systems
Some systems work fine today but are approaching the end of their support life. This includes building automation platforms the manufacturer no longer supports, outdated controls, and equipment running on refrigerants that are being phased out.
R-22, whose U.S. production ended in 2020, is the familiar example. The bigger issue for most buyers today is R-410A, the refrigerant in much of the HVAC equipment installed over the past 15 years.
Under the federal AIM Act, the EPA is phasing down HFC production and consumption, including R-410A, by 85% by 2036. Since January 1, 2025, manufacturers can no longer produce or import new residential and light commercial air conditioning equipment with R-410A.
Existing R-410A systems can still be legally serviced, and the refrigerant remains available. But as supply tightens, service costs are expected to rise, and when a unit fails, the replacement will use a different refrigerant. That can mean more than swapping one unit for another, depending on the system and its configuration.
These systems often keep running until they fail. When that happens, parts are hard to source, repairs take longer, and a planned replacement turns into an emergency.
During due diligence, inventory refrigerant types, controls platforms, and equipment ages to see how much of the building is on a clock. This lets you schedule replacements on your terms, not the equipment’s.
Turning findings into deal terms
Diligence findings are only useful if they change the deal. Depending on what you find and how much negotiating room you have, they can support:
- A price adjustment that reflects capital needs the seller didn’t disclose or price in.
- Seller credits at closing for specific, documented items.
- Escrows or holdbacks tied to repairs that can’t be fully priced before closing.
- Repairs completed before closing, with defined scope and sign-off.
- A funded capital reserve sized to the real first-year capital needs.
How those terms are structured is a conversation for your counsel and lender.
The diligence team needs defensible numbers: clear scope, current cost ranges, timing, and the reasoning behind each item.
Vague findings are easy for a seller to dismiss. Documented findings are much harder to dispute.
Build the first-year capital plan before closing
The best time to build the capital plan for a new acquisition is during due diligence, while you still have leverage and before you inherit the problems.
Use the findings to sort every item into one of three groups:
That third group is where plans most often fail. Deferral is reasonable when it is documented and monitored. It becomes expensive when it turns into neglect.
Rick Biedenweg of Pacific Partners Consulting Group estimates that every $1 of deferred maintenance becomes $4 in future capital renewal needs. A deferral without a trigger is usually just a larger bill scheduled for later.
If you’ve used a scoring framework for capital priorities before, the same approach works here: rank items by risk, asset protection, operating impact, and tenant impact, then let those scores decide which group each item falls into.
The goal is to close with a clear view of first-year costs, not to discover them through a year of surprises.
How Building Operations supports buyers before closing
A condition assessment provides an engineer’s view of a building. Buyers also need an operator’s perspective: people who have run these systems, managed these vendors, and delivered these replacements in occupied buildings.
Building Operations brings that perspective to the diligence process. With over 20 years of experience across commercial office, industrial, retail, medical, and life science properties, we know where buildings tend to hide costs and how to quantify them.
We help buyers scope diligence around their business plan, review third-party reports with a focus on how the building will actually perform, and turn findings into a capital plan that supports ownership from day one.
Because we also provide project and property management, our work doesn’t stop at the transaction. The people who identified the issues can manage the repairs and run the building once it’s yours.
Every finding has a price. Before signing, you can negotiate it. After, you pay it.
If you’re evaluating an acquisition, we’ll work alongside your assessor and advisors to make sure the building you’re buying matches the one you underwrote, and that you start ownership with a clear path forward. Let’s talk before you close.