Can You Finance Converting Vacant Office Space Into Medical Office in 2026?

The quick read: Yes, you can finance converting vacant office space into medical office in 2026 when a signed healthcare lease anchors the project. Lenders treat it as a renovation or construction loan sized on the value the lease creates, with tenant improvements and the plumbing, electrical and elevator work funded in the budget. CRE Daily's February 28, 2026 brief put 2025 medical office occupancy at 92.3%, against 80.2% for traditional office. Without a lease, the building is still a vacant office, and Trepp put office CMBS delinquency at 12.16% in September 2026.

Can you finance converting vacant office space into medical office in 2026?

Yes, you can finance an office-to-medical conversion in 2026 when a healthcare tenant has signed a lease before the loan closes, because the lease turns a vacant office into an income-producing medical property that a lender can value on completion. Without that lease, lenders still underwrite the building as vacant office.

The distinction comes from bank valuation guidance. The OCC's Comptroller's Handbook on commercial real estate lending (Version 2.0, updated as of March 20, 2025) says a preleased property to be constructed should generally be valued as completed, while one not preleased to stabilized levels calls for an as-stabilized value. The first rests on rent a tenant has agreed to pay; the second rests on an assumed lease-up.

A lender looks for three things on a conversion file:

• A signed lease with a healthcare tenant whose credit the lender can underwrite, which is where how medical tenant entities affect office financing matters
• A budget that funds completion, including the medical building systems and the tenant improvements
• Equity and an interest reserve that carry the loan until rent starts

The same handbook says a loan for partial construction without committed funds for completion is generally considered a liberal underwriting practice. An unpriced plumbing riser or a missing elevator is that gap.

Value standard with a signed lease (OCC Comptroller's Handbook): as-completed
Value standard without a lease to stabilized levels (OCC Comptroller's Handbook): as-stabilized

Why do lenders prefer medical tenants to general office tenants in 2026?

Lenders prefer medical tenants in 2026 because medical office kept occupancy high and rents rising over the same two years general office rents fell, while the distress in office loans sits in the general office collateral that a speculative conversion still resembles. The occupancy gap alone is more than twelve percentage points.

CRE Daily's February 28, 2026 brief, summarizing a national medical office research report, said medical office occupancy averaged 92.3% in 2025 against 80.2% for traditional office, that medical office rents rose 6.2% from 2023 to 2025 while general office rents declined 3.4%, and that medical office cap rates compressed to 6.49% by year-end 2025. The same brief said deliveries of new general office space fell 54.1% from 2023 to 2025, while medical office deliveries fell 5.3%.

Bisnow's June 25, 2026 conference report, citing industry research, said medical office demand has exceeded supply nationally by 4.7 million square feet since the pandemic. Its February 26, 2026 report, citing a separate study, said outpatient revenue has increased 45% since 2020, compared with 16% for inpatient care. Outpatient care is the use a converted office floor can house.

The lending tape agrees. Trepp's report of October 2, 2026 put the office CMBS delinquency rate at 12.16% in September, up 16 basis points, against 8.02% for CMBS overall. In the Federal Reserve's October 14, 2026 Beige Book, the Chicago District said "office leasing in government, medical, and higher education spaces increased" while overall commercial real estate activity was unchanged.

Table: Medical office versus general office, the datapoints a lender reads

What does a medical conversion cost that a general office refit does not?

A medical conversion costs more than a general office refit because exam rooms, procedure rooms and dental operatories need extra plumbing, wiring and structure, and because a healthcare tenant removes an accessibility exemption that an ordinary small office building keeps. The OCC states the cost gap plainly for construction and tenant improvements.

The OCC handbook says medical office buildings need additional plumbing and wiring for examination room fixtures and equipment, so construction and tenant improvement costs are higher than for conventional office. Bisnow's June 2026 report described a dental buildout that needs water and vacuum at every patient chair and reinforced floor plates against equipment vibration. At a February 2026 Bisnow forum, a healthcare real estate executive warned against converting a three-story office building that lacks gurney-sized elevators, because adding a custom one becomes prohibitively expensive.

Accessibility is the line investors most often leave out of a first budget. Under the ADA rules at 28 CFR 36.404, an altered facility that is less than three stories, or has less than 3,000 square feet per story, does not have to install an elevator, except when it houses the professional office of a health care provider, among a few other uses. Only floor levels that house, or are designed for, a health care provider count, so a provider on the upper floor of a small two-story building takes that floor out of the exemption.

Section 36.403 adds the path-of-travel rule: altering a primary function area means making the route to it, and the restrooms, telephones and drinking fountains serving it, accessible unless the cost is disproportionate, which the rule defines as more than 20% of the cost of the alteration to the primary function area. Alterations a tenant makes in tenant-only space do not trigger that duty for landlord-controlled areas that are not otherwise being altered, which is why the lease work letter belongs in the loan file.

We found no public source we could verify that states a typical per-square-foot cost to convert office to medical, so this guide does not print one. Price the scope from your architect and a contractor's bid, and expect the lender's construction consultant to test it.

Elevator exemption for altered buildings under three stories or under 3,000 square feet per story (28 CFR 36.404): does not apply to the professional office of a health care provider
Path-of-travel cost deemed disproportionate (28 CFR 36.403): above 20% of the primary-function alteration cost

How do lenders value and size a leased medical conversion?

Lenders value a leased medical conversion on its prospective as-completed value, which reflects the signed lease, and size the loan against both that value and the actual cost, because bank guidance caps construction loans below completed-property loans and limits disbursements to actual construction outlays. The signed lease is what makes the as-completed value bankable.

The interagency lending guidelines in 12 CFR part 365, Appendix A, tell banks to keep internal loan-to-value limits within supervisory ceilings: 80% for commercial and other nonresidential construction and 85% for improved property. A construction loan there includes rehabilitating buildings, which describes a conversion, and completed commercial property counts as improved property. Loan disbursements should not exceed actual construction outlays.

The OCC handbook says a construction appraisal should include a prospective market value, as complete and as stabilized, and that prudent policies set minimum preleasing as a condition of commitment or funding, checked for bona fide commitments. A signed medical lease is that commitment.

Illustrative example (our hypothetical numbers and arithmetic, not an appraisal or a quote from any lender): on a converted building with a $10,000,000 as-completed value, the 80% construction ceiling is $8,000,000 and the 85% improved-property ceiling is $8,500,000. Neither is a loan amount. The lender's own policy, the actual budget and the building's income sit underneath, and the smallest of them sets the proceeds.

Supervisory loan-to-value ceiling, commercial and other nonresidential construction (12 CFR part 365, Appendix A): 80%
Supervisory loan-to-value ceiling, improved property (12 CFR part 365, Appendix A): 85%

How is an office-to-medical conversion loan structured?

An office-to-medical conversion loan is structured in one of two ways: a floating-rate bridge loan that funds the purchase at closing and holds back the conversion and tenant improvement budget for draws, or a construction-to-permanent loan that funds the work and then converts to long-term debt once the tenant opens and pays rent.

Bridge with a holdback. The lender funds the purchase or refinance at closing, holds back the conversion budget and releases it in draws against completed work. It fits a building whose shell and elevators already suit medical use. Bridge loans float over an index, and SOFR was 3.90% on October 22, 2026, per FRED. A takeout follows once rent starts; the value-add loans page covers renovation-to-stabilization plans.

Construction-to-permanent. One lender funds the conversion and converts the loan to permanent debt once the building is complete and the lease is in effect, which removes the separate takeout refinance. Fixed-rate permanent debt is typically quoted as a spread over a Treasury yield of similar term, and the 10-year Treasury yield was 5.13% on October 21, 2026, per FRED.

Either structure needs an interest reserve. The OCC describes it as a lender-established account that covers loan interest during construction and lease-up, sized to carry interest through completion and lease-up, sale, or occupancy.

Illustrative example (our hypothetical assumptions and arithmetic, not a quote from any lender): a $5,000,000 conversion loan at SOFR's 3.90% plus an assumed 3.50% spread, or 7.40% all in. Fully drawn, interest runs about $30,833 a month. Over a 12-month conversion with the loan half drawn on average, the reserve needs about $185,000.

• Leased: the medical tenant signed before closing and starts paying rent three months after completion. Add about $92,500, for a reserve of about $277,500.
• Speculative: no tenant has signed, and lease-up takes nine months after completion. Add about $277,500, for a reserve of about $462,500.

The speculative version needs about $185,000 more reserve on the same building, before any free rent or leasing commission for a tenant not yet found.

SOFR, October 22, 2026 observation (FRED): 3.90%
10-year Treasury yield, October 21, 2026 observation (FRED): 5.13%

Can you finance a medical conversion before a healthcare tenant signs?

You can finance a medical conversion before a healthcare tenant signs only as a vacant office loan with a renovation budget, sized on the building's as-is value and an as-stabilized value that depends on assumed leasing, which means a longer interest reserve and more equity at risk than the same project with a signed lease.

Until a tenant signs, the lender is lending against an empty office building, the property type behind Trepp's 12.16% office CMBS delinquency rate in September 2026. The medical occupancy and rent figures above describe leased medical buildings; they do not transfer to a floor with no medical tenant.

The OCC handbook adds that construction costs closely approaching or exceeding the expected value of the project's income generally indicate a project is not feasible, and a speculative conversion has to show that value on an assumed rent from an assumed date.

The practical sequence is to tie up the building, sign the healthcare tenant to a lease or binding letter of intent with an agreed work letter, then close the conversion loan. If the purchase must close first, a smaller bridge on the as-is office, refinanced once the lease is signed, limits the equity at risk.

How do you get an office-to-medical conversion loan placed?

You get an office-to-medical conversion loan placed by sending lenders one package that pairs the signed healthcare lease with a contractor-priced budget for the medical systems, accessibility work and tenant improvements, so each lender can size the as-completed value and the holdback on the same facts and compete on terms.

Option 1, the brokerage route (our pick; YieldStack publishes this guide): YieldStack is an AI-native commercial mortgage brokerage that arranges financing for commercial real estate investors. The reasons it comes first for a medical conversion:

• Breadth: the deal is matched against 20,000+ loan programs, so the search reaches bridge, construction and permanent lenders whose appetite for medical tenants and office collateral differs
• Speed: YieldStack reports a median first offer in under an hour, from an institutional lender
• Side of the table: Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed.
• Cost: It costs Zero upfront to submit a deal and review offers; YieldStack's broker fee is 0.50–1.00% of the loan amount and is paid only at closing.

That fits a conversion because the terms that move the outcome, the value standard, the holdback release conditions, the interest reserve and the takeout, differ from lender to lender, and comparing term sheets side by side shows total proceeds rather than only the rate.

Option 2, a lender you already know: one lender gives you one view of the medical lease, one holdback policy and one value standard, and you negotiate each of them alone.

The package that gets comparable quotes carries:

• The signed lease or letter of intent, the tenant entity's financial statements and any guaranty
• The work letter showing what the landlord and the tenant each fund
• The architect's scope for plumbing, electrical, mechanical, elevator and accessibility work, with a contractor's bid
• The purchase contract or payoff, a property condition report, your equity and your timeline to rent commencement

When it is ready, send the medical conversion for review. For a building that is already complete and leased, the medical office loans page and the guide on how to finance a medical office building cover the permanent loan.

The bottom line

A vacant office becomes financeable as medical office when a healthcare tenant signs. The lease lets a lender use an as-completed value, and medical office's 92.3% occupancy in 2025, per CRE Daily, supports lending on it. The budget has to fund the plumbing, wiring, elevator and accessibility work the OCC and the ADA rules point to, and the reserve has to reach rent commencement. Without the lease, it is an office loan. Sign the tenant first, price the medical scope second, close the loan third.