A dental practice is one of the most expensive kinds of tenant to relocate. Once you have trenched plumbing into the slab, shielded an imaging room, and built six operatories, moving is a six-figure event. That makes the lease far more consequential for a dentist than for a typical office tenant, and it means the landlord knows you are unlikely to leave. Everything you want in the lease has to be negotiated before you sign, because your leverage drops sharply the day construction starts.
This chapter covers the terms that matter most for a dental tenant: how different lease structures change what you really pay, how tenant improvement allowances work and how to negotiate them, personal guarantees and how to limit them, exclusivity clauses, and the assignment clause that will decide whether your eventual practice sale goes smoothly. Commercial lease law and custom vary by state and by market. Use a tenant-side broker to negotiate business terms and a dental-specific real estate attorney to review the document before you sign anything, including the letter of intent.
Key takeaways
- Compare leases on total occupancy cost per year, not base rent. An NNN lease with lower base rent can cost more than a gross lease once taxes, insurance, and common area charges are added.
- Tenant improvement allowances usually cover only part of a dental buildout. Negotiate the amount, what it covers, and especially when the money is paid out.
- Personal guarantees are standard for small tenants, but you can often cap them, have them burn off over time, or convert them to a "good guy" structure.
- An exclusive use clause is one of the few ways to keep a competing dental office out of your plaza. Ask for it in the letter of intent.
- The assignment clause decides whether you can sell your practice. Get landlord consent standards, a pre-approved path for sale to a qualified dentist, and release of your guarantee on assignment.
Why a dental lease is different from an ordinary office lease
A standard office lease assumes a tenant who needs desks, lights, and outlets. A dental office needs a great deal more from the building, and many of those needs have to be written into the lease or the landlord has no obligation to allow them:
- Plumbing and slab work. Operatories need water, drain, compressed air, and vacuum lines to each chair, often run through trenches cut into the concrete slab. The lease must permit cutting and coring, and must say whether you have to restore it at the end.
- Mechanical equipment. Compressors and vacuum pumps need a mechanical room, and the vacuum typically exhausts outdoors. You may need rights to vent through a wall or roof.
- Radiation shielding and registration. Imaging rooms may need shielding, and the building must allow it.
- Heavy utility use. Dental offices use more water and electricity than a general office. In multi-tenant buildings with shared meters, landlords may charge extra or require submeters.
- Long payback. Because buildout is so expensive, you need a long initial term plus renewal options to amortize it. A five-year lease with no options on a six-figure buildout is a bad trade.
- A future sale. Most owners eventually sell to another dentist or a DSO, and the buyer's lender will require a lease that can be assigned with enough remaining term.
NNN vs. gross vs. modified gross: what you actually pay
Commercial leases allocate property operating costs between landlord and tenant in a few standard ways. The labels are used loosely, so always read how the lease defines each cost rather than relying on the label.
Triple net (NNN)
You pay base rent plus your proportionate share of the property's three "nets": real estate taxes, the landlord's property insurance, and common area maintenance (CAM), which covers things like parking lot upkeep, landscaping, snow removal, common area utilities, and often a management fee. The landlord estimates these charges, you pay the estimate monthly, and the landlord reconciles to actual costs after year end, which can mean a bill if costs came in higher. NNN is common in retail strip centers and freestanding buildings.
Gross (full service)
You pay a single rent and the landlord covers operating expenses. It is predictable, but the landlord prices expected costs and some cushion into the rent. Pure gross leases are uncommon in multi-year commercial deals; most "gross" leases include some mechanism for passing through increases.
Modified gross
A middle ground. Rent includes some operating costs, and the tenant pays others (commonly its own utilities and janitorial). Many modified gross leases use a base year or expense stop: the landlord covers operating costs up to the level of a base year, and you pay your share of any increase above it.
Comparing them honestly: a hypothetical example
The figures below are hypothetical, for a 2,400 square foot suite, to show how the same space can be priced three ways. They are not market quotes.
| Structure | Quoted rent | Pass-throughs in year 1 | Year 1 total | Year 3 if operating costs rise from $9 to $10.50 per sq ft |
|---|---|---|---|---|
| NNN | $26.00 per sq ft | $9.00 per sq ft (taxes, insurance, CAM) | $84,000 | Base rent with 3 percent bumps ($27.58) plus $10.50 = $91,400 |
| Modified gross, base year | $34.00 per sq ft including operating costs at year 1 level | None in year 1; tenant pays own utilities | $81,600 plus utilities | Rent with bumps ($36.07) plus $1.50 increase over base year = $90,169 plus utilities |
| Gross | $36.00 per sq ft all in | None | $86,400 | Rent with bumps ($38.19) = $91,662 |
The point is not which structure is cheapest in this made-up case. It is that you cannot compare offers without converting each to a total annual cost, projecting how pass-throughs might grow, and reading exactly which costs sit where. Also confirm whether utilities are separately metered, since that is a large line item for a dental office in any structure.
Rentable vs. usable square feet
In multi-tenant office buildings, rent is often charged on rentable square feet, which includes your share of lobbies, corridors, and restrooms, while you can only build in usable square feet. The difference is the load factor. A quote that looks cheaper per square foot may be applied to a larger rentable number. Ask for both figures and the measurement standard used, and have your architect confirm the usable area fits your plan before you sign.
CAM and operating expenses: keeping pass-throughs honest
In NNN and base-year leases, the operating expense clause is where costs quietly grow. Things to negotiate:
- A clear list of exclusions. Capital improvements (new roof, parking lot replacement), costs of leasing to other tenants, landlord's financing costs, legal disputes with other tenants, and costs covered by insurance or warranties generally should not be passed through, or capital items should be amortized over their useful life rather than billed in one year.
- A cap on controllable expenses. Many tenants negotiate a limit on annual increases in the costs the landlord controls (such as management and maintenance), while taxes, insurance, and utilities stay uncapped.
- Audit rights and deadlines. The right to review the landlord's records after each reconciliation (with the landlord paying for the audit if overcharges exceed a stated threshold), and a deadline after which the landlord cannot bill for a prior year.
- A fair pro rata share. Confirm how your share is calculated, including how any management fee and building vacancies are handled.
Tenant improvement allowances and how to negotiate them
A tenant improvement (TI) allowance is money the landlord contributes toward building out your space. For a dental tenant, it is often the largest single economic term after rent.
How big is a typical allowance?
It varies enormously with the market, the condition of the space, the length of the lease, and your credit. Commercial brokerage and design firm guides published in 2025 and 2026 commonly cite allowances in the range of roughly $25 to $100 or more per square foot, with raw shell space and longer terms toward the high end and secondary markets toward the low end. Compare that with dental buildout costs, which dental contractors commonly estimate at roughly $150 to $400 or more per square foot before equipment (see Chapter 4). The allowance almost always covers only part of the job. Treat any of these numbers as rough guides that vary by market and year; your tenant-side broker should know what comparable deals in your area actually received.
The four common structures
| Structure | How it works | Good for tenant when | Watch for |
|---|---|---|---|
| Dollar allowance | Landlord reimburses a fixed amount per square foot toward your construction costs | You want control of design, contractor, and schedule | Payment timing, eligible costs, landlord approval rights, construction management fees |
| Turnkey | Landlord builds the space to an agreed plan and specification | You have a clear, final design and trust the landlord's contractor | Change orders at your cost, quality of dental-specific work, delays that are not your fault but delay opening |
| Rent abatement | Months of free or reduced rent instead of, or in addition to, construction dollars | You need time to build and ramp up, and can fund construction another way | It does nothing for construction cash flow; check whether NNN charges are also abated |
| Amortized extra allowance | Landlord funds more than the standard allowance and recovers it through higher rent, with interest | You are cash constrained and the implied interest rate is reasonable | The implied rate, and whether the extra rent survives renewal |
What to negotiate
- The amount, tied to term. Landlords fund more for longer commitments. A 10-year initial term typically supports a larger allowance than 5 years.
- Eligible costs. Push for the allowance to cover soft costs (architecture, engineering, permits, project management) and cabling and signage, not just hard construction. Landlords rarely fund movable equipment, but ask whether items that become fixtures qualify.
- Payment timing. This is the one first-time tenants miss. Many landlords pay only after completion, a certificate of occupancy, final lien waivers, and sometimes after you open and pay the first month's rent. Your lender and contractor need to be paid long before that. Negotiate progress payments against draws, and make sure your construction loan can bridge any gap.
- Base building condition. Spell out what the landlord delivers before your allowance starts: adequate electrical service, HVAC capacity, code-compliant restrooms and accessible entrance, sprinkler system, roof in good repair. If the landlord's base building work is paid from your allowance, the allowance is smaller than it looks.
- Unused allowance. Ask for any unused amount to be applied as a rent credit rather than forfeited.
- Construction management fees. Landlords often charge a supervision fee on tenant work. Negotiate it down or out if you hire your own contractor.
- Deadline to use it. Allowances usually expire if not claimed within a set period. Make sure the deadline is realistic given permitting time.
Tax note: how an allowance is taxed depends on who owns the improvements and how the lease is written. Some allowances can be excluded from the tenant's income under a specific Internal Revenue Code provision for qualifying short-term retail and service leases; others are treated as income or reduce the tenant's depreciable basis. Have your CPA review the allowance language before signing, not after.
Rent commencement and the construction window
When rent starts is as important as how much it is. A lease that starts rent on the day you get the keys can have you paying for months of design, permitting, and construction before you see a patient. Startup timelines run long, and permitting is the least predictable part.
- Tie rent commencement to the later of a fixed period after the landlord delivers the space (with base building work complete) or the date you open for business, with an outside date so the landlord has certainty.
- Ask for a permit contingency: if you cannot obtain permits for your dental use within a set period despite diligent effort, you can terminate or the commencement date slides.
- If the landlord is late delivering the space or completing its work, rent commencement should slide day for day, and extended delay should earn you free rent or a termination right.
- Clarify whether NNN charges start with base rent or earlier.
Personal guarantees and how to limit them
Most landlords require the owner of a small professional practice to personally guarantee the lease, even when the practice entity signs as tenant. The guarantee means that if the practice stops paying, the landlord can come after you personally for the remaining obligations. On a 10-year lease that can be a very large number. You usually cannot eliminate the guarantee as a new practice, but you can often shape it.
| Limitation | How it works | When landlords accept it |
|---|---|---|
| Dollar or months cap | Guarantee limited to a fixed amount or a set number of months of rent | Common ask; more achievable with strong financials or a larger deposit |
| Burn-off | Guarantee reduces or ends after a period of on-time payment (for example, after the first several years) | Often negotiable because the landlord's buildout risk is highest early |
| Good guy guarantee | Guarantor is released if the tenant gives advance notice, pays rent through a surrender date, and returns the space in agreed condition | More common in some markets than others; ask your broker |
| Release on assignment | Your guarantee ends when the lease is assigned to a qualified buyer who provides their own guarantee | Essential for a practice sale; push hard for it |
| Security deposit or letter of credit instead | Larger cash deposit or bank letter of credit replaces or reduces the personal guarantee | Sometimes accepted; ties up cash or credit |
Also check who is signing. Some landlords ask for a spouse's guarantee. Whether that is required, and what it exposes, is a question for your attorney, and the answer may depend on your state's marital property rules.
Expensive mistake: selling your practice, assigning the lease to the buyer, and forgetting that your personal guarantee survives. If the buyer defaults years later, the landlord can pursue you for the rent. Unless the lease or the landlord's consent releases you, assume you remain on the hook.
Exclusivity: keeping a competitor out of your plaza
An exclusive use clause prohibits the landlord from leasing other space in the same property to a tenant who would compete with you. For a dental office in a retail center or a medical building, it can be worth a great deal, because the worst neighbor for a new practice is another new practice in the next suite.
How to make an exclusive meaningful:
- Define the protected use carefully. "General dentistry" may not stop a pediatric office or an orthodontist from moving in. Decide which uses you actually need protected. Landlords will resist an overbroad definition that blocks all dental specialties, so prioritize.
- Cover the whole property and nearby landlord-controlled parcels. An exclusive limited to your building does not stop the landlord from leasing the outparcel next door to a competitor.
- Specify a remedy. If the landlord violates the exclusive, what happens? Common remedies are reduced rent until the violation is cured and a right to terminate if it continues.
- Make it survive a sale of the property. A recorded memorandum of lease can help an exclusive bind future owners. Ask your attorney.
- Understand the carve-outs. Landlords usually exclude existing tenants and their assigns, and sometimes large anchor tenants. A pharmacy or big-box store with an in-store clinic may be outside your protection.
- Keep it assignable. The exclusive should transfer to whoever buys your practice.
The reverse also matters: read the landlord's existing exclusives granted to other tenants to make sure your use (including any retail sales of products) does not violate them. And avoid a radius restriction in your own lease that forbids you from opening another office within some distance. It can block a second location or complicate a sale to a group practice.
Assignment and subletting: the clause that decides your exit
If you remember one clause from this chapter, make it this one. Almost every dental practice sale involves transferring the lease to the buyer, either by assignment or a new lease. The buyer's lender typically requires the buyer to control the location for at least the life of the loan. If your lease lets the landlord refuse consent for any reason, the landlord effectively holds a veto over your sale and can use it to renegotiate rent at the worst possible moment. The acquisition track notes how often lease problems kill deals late.
What a strong assignment clause includes
- Consent not to be unreasonably withheld, conditioned, or delayed. Without this language, some states allow landlords broad discretion. Add a response deadline, after which consent is deemed given.
- A permitted transfer to a qualified dentist. State that assignment to a buyer of the practice who is a licensed dentist (or a dental entity) with financial strength comparable to yours at signing is permitted, or that refusal in that case is unreasonable.
- Change of ownership is addressed. Many leases treat a sale of the ownership interests in your practice entity as an assignment. Make sure bringing in a partner, a sale of the entity, or a transfer to your own new entity is either permitted or subject to the same reasonable standard.
- No recapture right, or a limited one. Some leases let the landlord terminate the lease and take the space back when you ask to assign. For a practice sale, that is devastating. Strike it or exclude practice sales from it.
- No sharing of practice sale proceeds. Landlords sometimes ask for a share of any "profit" on assignment. Make clear that payments for your practice, goodwill, equipment, and patient records are not rent and are not shared.
- Options transfer with the lease. Renewal options should be exercisable by an assignee, not personal to you.
- Release of you and your guarantee. Upon assignment to a qualified buyer who assumes the lease, the original tenant and guarantor are released.
- Reasonable fees. Cap the landlord's review and legal fees for processing an assignment.
Death and disability
Ask for a clause that lets your estate or representative assign the lease to a buyer of the practice, or terminate on reasonable notice, if you die or become permanently disabled. A dental practice loses value quickly without a dentist, and an estate stuck with a non-assignable lease and a personal guarantee is in a bad position. Pair this with appropriate disability insurance.
Term, renewal options, and the clauses that can move you
Initial term and options
Dental tenants commonly seek an initial term long enough to amortize the buildout, often around 10 years for a significant buildout, plus one or more renewal options of 5 years each. Options give you the right, not the obligation, to stay. Negotiate how option rent is set: a fixed increase, fair market value, or fair market value with a cap. If rent at renewal is fair market value, include a process for determining it (such as broker opinions or appraisal) so the landlord cannot simply name a number.
Relocation clause
Some leases let the landlord move you to other space in the property. For a dental office, relocation means an entire new buildout. Strike the clause. If the landlord insists, require that relocation be to comparable space, at the landlord's full cost including a complete dental buildout, equipment moving and reinstallation, and lost business, with no rent increase.
Demolition and redevelopment
Landlords of older properties sometimes reserve the right to terminate for redevelopment. If present, it should be unavailable during the period you need to recover your investment, and should include meaningful compensation for your unamortized improvements.
Restoration and surrender
Some leases require you to remove your improvements and restore the space at the end of the term. Removing plumbing, patching trenched slabs, and removing shielding is expensive. Negotiate that standard dental improvements may be left in place, and get the landlord's written confirmation of which improvements you must remove when your plans are approved.
The dental lease clause table
Use this as a working checklist with your broker and attorney. Customs and what is achievable vary by market and by the landlord's leverage.
| Clause | What it means | What to negotiate |
|---|---|---|
| Premises and measurement | Defines your space and how square footage is measured | Rentable and usable figures, measurement standard, architect verification before signing |
| Use clause | What you are allowed to do in the space | Broad dental use including imaging, nitrous oxide, sedation if planned, in-office lab, and retail sale of dental products |
| Term and commencement | Length of lease and when it and rent start | Long enough to amortize buildout; rent starts at later of fixed period after delivery or opening |
| Base rent and escalations | Starting rent and how it rises | Fixed annual increases you can budget, or index-based with a cap |
| Operating expenses and CAM | Your share of taxes, insurance, and maintenance | Exclusions list, controllable expense cap, audit rights, reconciliation deadline |
| Utilities | Who pays for water, power, gas, and how they are measured | Separate meters or fair submetering; no arbitrary surcharges |
| Tenant improvement allowance | Landlord contribution to buildout | Amount, eligible soft costs, progress payments, base building condition, rent credit for unused funds |
| Landlord's work | What the landlord delivers before your buildout | Adequate electrical service, HVAC capacity, accessible entrance and restrooms, roof and structure in good repair |
| Alterations | Your right to modify the space | Pre-approval of dental plumbing, slab cutting, venting, shielding; reasonable approval timeline |
| Maintenance and repairs | Who fixes what | Landlord responsible for structure, roof, and major systems; HVAC replacement cost allocation |
| Personal guarantee | Your personal liability for the lease | Cap, burn-off, good guy structure, release on assignment |
| Exclusive use | Landlord cannot lease to a competitor | Clear definition, whole property coverage, rent reduction and termination remedies |
| Assignment and subletting | Your right to transfer the lease | Reasonableness standard, permitted sale to qualified dentist, no recapture, release of guarantor |
| Renewal options | Right to extend | Multiple options, rent formula or cap, exercisable by assignee |
| Right of first refusal or offer | First chance to buy the building or lease adjacent space | Useful if you may want to buy later or expand |
| Relocation | Landlord may move you | Delete, or landlord pays every cost of a full dental rebuild |
| Signage | Your right to exterior and directory signs | Building and monument sign rights, size, placement, landlord cost sharing |
| Hours and HVAC | Building hours and after-hours charges | Access and HVAC during your actual clinical hours, including early mornings and Saturdays |
| Parking | Number and location of spaces | Enough spaces for staff and patients, reserved or designated patient parking |
| SNDA | Subordination, non-disturbance, and attornment with the landlord's lender | Non-disturbance protection so a foreclosure does not end your lease |
| Restoration and surrender | Condition you leave the space in | Standard dental improvements can stay; list agreed at plan approval |
| Death and disability | What happens if you cannot practice | Estate may assign or terminate on notice |
| Default and cure | What counts as default and how long you have to fix it | Written notice and reasonable cure periods for monetary and non-monetary defaults |
How to run the negotiation
Hire a tenant-side broker
A tenant representation broker searches for space, knows current deal terms in the market, and negotiates on your behalf. In many markets their commission is paid by the landlord out of the leasing commission, so hiring one may cost you nothing directly, though you should ask how they are paid and whether they also represent landlords in the buildings they show you. The listing broker on a property works for the landlord, no matter how helpful they are.
Negotiate the big items in the letter of intent
The letter of intent (LOI) is usually non-binding on the business terms, but it sets the framework, and landlords resist reopening points later. Put your most important asks in the LOI: rent and escalations, term and options, TI allowance and payment timing, rent commencement, exclusive use, guarantee limits, and assignment rights. If you wait for the lease draft, you are negotiating against the landlord's form with less leverage.
Have a dental-specific attorney review the lease
Landlord lease forms are long and written to protect the landlord. An attorney who regularly represents dental tenants knows which clauses matter for a practice sale, what your state's law implies when the lease is silent, and what is customarily negotiable in your market. The fee is small compared with the value of the lease obligation.
Test the space before committing
Before signing, get a test fit from a dental designer or architect and confirm plumbing routes and electrical capacity. Chapter 3 covers the building checks.
Leverage timing: your leverage is highest before you sign the LOI and lowest after construction begins. Keep at least one alternative site in play until the lease is signed. Landlords negotiate differently when they know you have somewhere else to go.
Dental lease review checklist
- I have converted every offer to total annual occupancy cost, including pass-throughs and utilities.
- I know the rentable and usable square footage and my architect has confirmed my plan fits.
- The use clause covers every service I plan to offer, including imaging and nitrous oxide.
- The lease permits slab cutting, plumbing, venting, and shielding, and says what I must restore at the end.
- The TI allowance amount, eligible costs, payment timing, and deadline are in writing.
- Rent commencement is tied to delivery plus a build period or opening, with a permit contingency.
- My personal guarantee is capped, burns off, or ends on assignment.
- I have an exclusive use clause with a real remedy.
- Assignment to a qualified dentist buyer is permitted or subject to a reasonableness standard, with no recapture.
- Renewal options are exercisable by an assignee, with a defined rent formula.
- The relocation clause is deleted or fully funded by the landlord.
- There is an SNDA protecting me from a landlord's foreclosure.
- A death and disability clause protects my estate.
- A tenant-side broker and a dental-specific real estate attorney have reviewed the deal.
Bringing it together
A good dental lease keeps your total occupancy cost predictable, has the landlord share in the cost of making the space work for dentistry, and keeps your exit open so you can sell on your terms. Lease law and market norms vary by state and city, so rely on a tenant-side broker for market terms and a dental-specific real estate attorney for the document. Related reading: overhead benchmarks, Chapter 1: Lease vs. Buy, and the acquisition track for how buyers review an existing lease.
What's next
The best lease terms in the world will not save a practice in the wrong location. Chapter 3: Site Selection for a Dental Practice covers which demographics actually matter, how to map competition honestly, visibility and parking, and how to verify zoning and building suitability before you sign.
This guide is educational content and does not constitute legal, financial, tax, or clinical advice. Laws and regulations vary by state and change over time. Consult your own dental-specific attorney, CPA, and state dental board before acting.