Dental office build-out cost: what construction really costs in 2026

The build-out is usually the biggest single line in a dental startup or relocation budget, and it is the one owners understand least. Equipment comes with a quote you can read line by line. Construction comes with a number per square foot that sounds precise and usually isn't. This guide walks through what the money buys, how I size it, where it leaks, and how to keep it honest from the first walkthrough to the certificate of occupancy.

One note on the numbers. The rates on this page are the planning assumptions inside the Alithos cost estimator. They are planning math, not a quote and not survey data. I show where they sit against published ranges so you can judge it for yourself. Your contractor's bid on your drawings is the only number that counts in the end.

What does a dental office build-out include?

A build-out (also called a tenant improvement or finish-out) is the construction that turns raw or previously used space into a working dental office. In leased space, that is everything inside the suite. It does not include the dental chairs, delivery units, sterilization equipment or imaging. Those are equipment, and I budget them separately in the dental equipment cost guide.

What makes a dental build-out different from a standard office is how much of the cost hides in walls, floors and ceilings. The table below lists the major scope items and why each one costs more in a dental office.

The short version: in a dental build-out, the expensive work is what patients never see. That is why two suites with identical finishes can price very differently.

How much does a dental build-out cost?

The Alithos estimator sizes the space first, then prices construction per square foot. It assumes 500 sq ft per operatory for 3 to 5 operatories, 450 for 6 to 7, and 425 for 8 or more. It prices leased-space construction at $170 per square foot for standard finish and $220 for premium finish. Cabinetry adds 10% of construction and soft costs add 12%, so the last column multiplies construction by 1.22.

Alithos planning model. Point estimates; the estimator publishes them as ranges of plus or minus 5%. Excludes equipment, imaging, IT and furniture, working capital and any landlord allowance. Not a quote.

How does that compare with the market? A 2026 guide from Dental & Medical Counsel, a California dental law firm, puts leasehold build-outs in California at $150 to $350 per square foot and ground-up projects often at $400 or more [1]. The model's $170 to $220 sits inside that published leasehold range, in the lower half of it. If your market is expensive, your bids can land above it, and I would rather you find that out on paper than in a change order.

You will also see JLL's 2026 benchmark cited: a national average all-in fit-out of $412 per square foot for medical outpatient space, starting from a warm white box, with hard costs of $226 per square foot [2]. That figure is for medical outpatient space, not dental, and "all-in" includes soft costs, furniture, fixtures, equipment and technology. Don't compare it directly with a dental construction-only rate. It is useful as a sanity check that a clinical fit-out is not a $100-per-foot project.

If you only need the per-square-foot question answered, I break it down further in dental office construction cost per square foot. If you need to size the suite first, the operatory square footage calculator does that step on its own. And because construction is only one line of the project, the dental practice startup costs guide shows how it fits with equipment, imaging and working capital. In the model, a 5-operatory lease at standard finish totals about $887,000 to $980,000 all-in, and construction plus cabinetry and soft costs is more than half of it.

Why are dental build-outs more expensive than other offices?

Four things drive the premium. None of them show up on a rendering.

Plumbing density. A general office suite might have water at a break room and two restrooms. A dental suite needs water and drain at every operatory, sterilization, the lab and usually a handwashing sink in or near each operatory. In a slab-on-grade building, reaching each chair can mean saw-cutting and trenching the floor. That work is priced per run, and a 5-operatory office has a lot of runs.

Mechanical systems. Suction and dental air come from a vacuum pump and a compressor in a dedicated mechanical room, piped to each chair. HVAC usually needs more zoning and exhaust than an office. Each system has its own installer, its own testing and its own inspection.

Radiation shielding. Imaging areas need a shielding design from a qualified expert, and the walls and doors have to be built to it. The design depends on the equipment, the room layout and what sits on the other side of each wall. A pano or CBCT room near a shared corridor or a neighbor tenant can change the answer.

Codes for clinical space. Accessibility, plumbing, gas and vacuum, fire and electrical codes all apply, and some, like the rules for gas and vacuum piping, never come up in a standard office. Code-driven work is not optional, so it cannot be value-engineered out late.

Regional pricing matters too. JLL notes that construction in Northeast markets prices higher than in Sunbelt markets [2]. Material and labor inputs move over time as well; the Bureau of Labor Statistics tracks construction input prices in its Producer Price Index program [7]. I don't apply a regional multiplier in the model. I ask for local bids early instead.

How much do cabinetry and soft costs add?

The Alithos estimator adds cabinetry at 10% of construction and soft costs at 12% of construction. On a 2,500 sq ft suite at $170 per square foot, that is $42,500 of cabinetry and $51,000 of soft costs on top of $425,000 of construction, for $518,500. At $220 per square foot it is $55,000 and $66,000 on top of $550,000, for $671,000.

Cabinetry is its own line because it often isn't in the contractor's number. Clinical and sterilization cabinetry may come through an equipment dealer or a millwork supplier, while the general contractor installs only the casework it was asked to price. If nobody owns the line, it lands in your lap after the bids are signed.

Soft costs are the dollars that don't buy materials or labor on site. In a build-out they typically include architectural and engineering design, the shielding design, permit and plan-review fees, utility and impact fees where they apply, testing and inspections, insurance during construction, and legal review of the lease and construction contract. Some of these are fixed fees. Others scale with the project. Either way, a contractor's per-square-foot quote usually doesn't include them, so ask what is excluded. The costs that most often go unbid get their own walk-through in the hidden costs of a dental startup.

What is the difference between a shell, a vanilla shell and second-generation dental space?

The condition of the space you start from changes how much of the build-out you pay for. Landlords and brokers use these terms loosely, so get the actual delivery condition in writing in the lease.

Second-generation space is the one that tempts people most. One construction firm publishes an estimate that previously built-out medical space can cost substantially less to finish [3]. Sometimes that is true. Sometimes the plumbing is in the wrong places for your operatory count, the vacuum lines are the wrong size, the shielding was designed for a different machine, or the suite doesn't meet current accessibility rules. Moving and upgrading old infrastructure can cost as much as starting clean. I treat any savings as a hypothesis until a contractor and designer walk the suite and price it.

For more on choosing the space itself, see the dental office real estate guide.

Who pays for the build-out: you or the landlord?

Usually both. In a lease, the landlord often offers a tenant improvement (TI) allowance: a set amount per square foot toward the build-out. You pay the rest. One contractor's 2026 guide puts typical medical office TI allowances at roughly $40 to $100 per square foot nationally, with more in high-cost metros, and they vary widely by market, lease term and building [3]. I know of no primary national survey of dental TI allowances, so treat any range as a starting point for the conversation, not a benchmark you are owed.

Here is the arithmetic on the 5-operatory example. At $170 per square foot, construction is $425,000. A $50-per-square-foot allowance on 2,500 sq ft is $125,000, which leaves $300,000 of construction for you to fund, plus cabinetry and soft costs. At $100 per square foot, the allowance is $250,000 and your share of construction drops to $175,000. That gap is why the allowance belongs in the first round of negotiation, not the last.

Illustration only. Excludes cabinetry and soft costs. Allowances depend on your market and lease.

Three things matter as much as the headline number. First, what the allowance can be spent on: some leases limit it to hard construction and exclude design fees, cabinetry or signage. Second, how and when it is paid: a reimbursement after completion means you or your lender carry the cost during construction. Third, whether any part is amortized into rent, which means you are borrowing it from the landlord at an interest rate you should compare with your bank's. Your attorney reviews the lease before you sign. I don't give legal advice on lease terms.

I go deeper on negotiating the allowance in tenant improvement allowances: negotiating the landlord's money, and the TI allowance calculator runs the gap for your own square footage and rate.

What codes, permits and inspections apply?

A dental build-out touches more codes than a standard office. The list below is what I make sure is in the budget and the schedule. It is not a compliance checklist, and it changes by state and city.

• Accessibility. Dental offices are public accommodations under Title III of the Americans with Disabilities Act, and new construction and alterations follow the 2010 ADA Standards for Accessible Design [4]. That affects entrances, restrooms, door widths, reception counters and the routes into and through the suite. Many states and cities add their own accessibility codes on top.
• Radiation shielding and x-ray registration. NCRP Report No. 177 (2019) is the national guidance on radiation protection in dentistry, including CBCT and handheld units [5]. Shielding is designed by a qualified expert for your equipment and room layout, and the contractor builds to that design. States regulate x-ray machines through their radiation-control programs. In California, for example, the CDPH Radiologic Health Branch requires a facility to register a radiation machine within 30 days of acquiring it [6]. Check your own state's program early, because some states also review shielding plans before installation.
• Gas and vacuum systems. NFPA 99, the Health Care Facilities Code, covers medical and dental gas and vacuum piping [8]. How much of it applies depends on what you pipe (for example, nitrous oxide) and the level of sedation you plan to offer, and on which edition your jurisdiction has adopted. Installers and verifiers for these systems often need specific credentials.
• Building permit and plan review. Your local building department reviews the drawings for building, plumbing, mechanical, electrical and fire code. Plan review can involve comments and resubmittals, so the schedule should carry time for it.
• Inspections and certificate of occupancy. Inspections happen in stages during construction, and you need a certificate of occupancy or final sign-off before you see patients. Health, fire and radiation inspections can be separate from the building inspection.

How long does a dental build-out take?

I won't give you a universal number of weeks, because the honest answer depends on your city's plan-review queue, the condition of the space, equipment lead times and how quickly decisions get made. What I can give you is the sequence. Every phase below has to finish, or at least overlap carefully, before the next one starts.

1. Space and budgetConfirm the operatory count, square footage and an all-in budget before the lease or purchase is signed. This is the step that decides whether the rest is affordable.
2. DesignFloor plan, then construction drawings with plumbing, mechanical, electrical and shielding design. Equipment selections need to be locked enough for the drawings to show utility locations.
3. PermitSubmit drawings, answer plan-review comments and receive the building permit. Some cities run this fast; others don't.
4. Bidding and contractBid the drawings (or price them with a design-build team), review the quotes against one scope and sign the construction contract.
5. ConstructionDemolition, rough-in of plumbing, vacuum, air and electrical, inspections, walls and ceilings, finishes.
6. Equipment and cabinetry installChairs, delivery units, sterilization, imaging and cabinetry go in after finishes. Imaging may need shielding verification and state registration.
7. Final inspections and occupancyFinal building, fire and other inspections, the certificate of occupancy, then IT setup and staff training before the first patient.

Two practical points. Equipment and cabinetry lead times can be longer than construction, so order them on a schedule that matches the build, not after it. And if rent starts before you can open, every week of delay is a cost, which is why I ask for any free-rent period to line up with a realistic build schedule. The full sequence for a new practice is in how to open a dental practice.

How should you compare contractor bids?

Bids are only comparable if they price the same thing. Most of the time they don't. One bidder includes cabinetry and another excludes it. One carries a large allowance for electrical and another a small one. One includes the vacuum and air piping, and another assumes the equipment dealer handles it. The lowest number on the cover page is often the one with the most exclusions.

Before you compare totals, put every bid on the same scope sheet:

• Same drawings and scope. Every bidder prices the same drawing set and revision. If one bidder priced an older set, the comparison is broken.
• Exclusions. List every exclusion side by side: cabinetry, low-voltage, shielding materials, permit fees, utility fees, signage, equipment hookups.
• Allowances. Any line priced as an allowance is a guess. Compare the allowance amounts and ask how each was set.
• Alternates. Price upgrades and deductions as separate alternates so you can choose them knowingly instead of discovering them later.
• General conditions and fee. Supervision, temporary facilities, insurance, cleanup and the contractor's fee can be shown in very different ways. Normalize them.
• Schedule. A low bid with a long schedule may cost more once rent and delayed opening are counted.
• Contingency. Know whether the bid carries its own contingency, and who controls it.

This is the independent quote review I do in a Project Navigator engagement: lining up the quotes on one scope, flagging exclusions and allowances, and showing what each bid really costs against your budget. I don't negotiate with contractors on your behalf and I don't manage construction. You and your contractor own the contract. I give you a clear read of what you are being asked to sign.

The way the project is delivered also shapes how bids work. A design-build team prices as it designs, while a design-bid-build project bids a finished drawing set. The tradeoffs are in design-build vs. design-bid-build for dental offices. If an equipment dealer is offering a free floor plan, read what a "free" dealer design really costs before you build your bid around it.

How do change orders affect the budget?

A change order is any change to the contract scope, price or schedule after signing. Some are unavoidable: a hidden condition behind a wall, a plan-review comment, a code requirement nobody caught. Others are choices: a different floor, an extra outlet, a moved wall. Both cost money, and they add up quietly because each one looks small next to a six-figure contract.

The discipline is simple and hard to keep. Price every change against the plan before you approve it. That means three questions on every change order:

1. What is the cost and schedule impact?In dollars and days, in writing, before work starts.
2. Is it required or chosen?Required changes come out of contingency. Chosen changes should be traded against something else in the budget, or approved knowing they raise the total.
3. What does the budget look like after it?Keep a running total of approved changes against contingency so you always know what is left.

Change-order review and budget tracking against the plan are both part of the Project Navigator. It starts from $20,000, is quoted per project, and availability depends on your project's state; I confirm that before we engage.

What does a ground-up build add?

A ground-up dental building replaces the landlord's shell with your own. The Alithos estimator prices ground-up construction at $340 per square foot standard and $420 premium, which on a 2,500 sq ft, 5-operatory building is $850,000 to $1,050,000 of construction, or $1,037,000 to $1,281,000 with cabinetry and soft costs. Land is not included. The California guide cited above puts ground-up projects often at $400 or more per square foot [1], so the model's ground-up rates sit at or slightly below that figure, and your market may run higher.

On top of the interior work, ground-up adds the site: land, survey and soils reports, grading, utilities to the lot, parking and landscaping, plus zoning and site-plan approvals. Each brings its own consultants and fees. The full path, including when it makes sense, is in the guide to building a dental office. If you are still choosing between leasing, buying a condo and building, the planning options comparison and build, lease or condo lay out the math.

Build-out budget checklist

Before you sign a lease, a purchase agreement or a construction contract, every item below should be answered in writing.

• Operatory count and total square footage confirmed against your production plan.
• Delivery condition of the space (shell, vanilla shell or second-generation) written into the lease.
• TI allowance amount, what it can be spent on, and when and how it is paid.
• Construction budget per square foot set from local bids or a realistic planning rate.
• Cabinetry carried as its own line, with a named supplier and installer.
• Soft costs budgeted: design, engineering, shielding design, permits, fees, testing, insurance, legal.
• Shielding design ordered from a qualified expert and state x-ray registration planned.
• Vacuum, compressed air and any gas piping assigned to a specific contractor's scope.
• Low-voltage, data and IT cabling assigned to a specific scope.
• Equipment utility requirements given to the designer before construction drawings are final.
• All bids normalized on one scope sheet: exclusions, allowances, alternates, general conditions.
• Contingency set, with a clear rule for who can spend it.
• Change-order process agreed: priced in writing and approved before work.
• Schedule tied to rent start, equipment lead times and opening date.
• Financing sized to the all-in project, not just construction (see dental practice financing).

This is the work the Budget Plan does before you commit. It is a flat fee of $7,500 to $10,000, with the exact fee and scope set in writing before work starts, and it includes the space and equipment budget, build vs. lease vs. condo projections and a lender-ready package. If you want a quick go or no-go first, the Feasibility Check is $2,500 flat and credits toward the Budget Plan.

Dental build-out cost FAQ

Start with your own numbers: run the cost estimator, compare against the Alithos cost benchmark, or book a free Project Fit Call and bring your space and timeline. More guides are in the guides library.

Sources

1. Dental & Medical Counsel (A. Oromchian), "A Dental Lawyer's Guide to Your Dental Office Build-Out" (2026). dmcounsel.com
2. JLL, "Benchmarking the cost of fit-outs for today's outpatient care environment" (2026). jll.com
3. Terrapin Construction Group, "Medical Office Tenant Improvement Cost Per Square Foot" (2026). Contractor publication. terrapincg.com
4. U.S. Department of Justice, Civil Rights Division, "2010 ADA Standards for Accessible Design" (2010). ada.gov
5. National Council on Radiation Protection and Measurements, NCRP Report No. 177, "Radiation Protection in Dentistry and Oral & Maxillofacial Imaging" (2019). ncrponline.org
6. California Department of Public Health, Radiologic Health Branch, "X-ray Machine Registration" (accessed 2026). cdph.ca.gov
7. U.S. Bureau of Labor Statistics, Producer Price Indexes (accessed 2026). bls.gov
8. National Fire Protection Association, NFPA 99, Health Care Facilities Code (current edition). nfpa.org
9. Alithos Advisory, cost estimator and benchmark methodology (2026). alithos.co