How do you estimate a dental office build-out?

Key facts

All BuildCrux figures come from one vendor's estimating catalog. Treat them as a cross-check, not a bid.

Step 1: Get the right documents

You can't price a dental job from an architectural plan alone. GCMM notes that equipment selection must happen during design, because the chair manufacturer's rough-in specs decide where every plumbing and electrical connection goes. Changing after rough-in is one of the most expensive mistakes (GCMM). Before pricing, ask for:

• Architectural and MEP drawings, including the plumbing fixture schedule
• Equipment rough-in templates for every chair, delivery unit, compressor and vacuum (see dental chair rough-in specs)
• Shielding design for imaging rooms (see x-ray shielding plans)
• A low-voltage plan with drop counts (see dental office low-voltage plan)
• The responsibility matrix: equipment owner-supplied versus contractor-supplied

Step 2: Build the per-operatory unit

BuildCrux says each operatory needs dedicated plumbing (water, vacuum, sewer), compressed air, electrical, low-voltage and finish work (BuildCrux). Build one operatory unit cost and multiply. BuildCrux's own example is that six operatories versus four is a $90K–$120K delta (BuildCrux).

A per-op unit typically carries:

1. Floor-box or wall rough-in for water, air, vacuum and drain
2. Dedicated circuits and receptacles per the equipment specs (see dental operatory electrical)
3. Data and video drops
4. Casework
5. Flooring, ceiling, lighting and paint
6. HVAC zone or diffuser work

Price unequipped future operatories separately.

Step 3: Price the special rooms

• Imaging: $40K–$120K per BuildCrux, covering lead-shielded walls, dedicated electrical and structural support. CBCT adds more shielding and a larger room (BuildCrux).
• Mill: $15K–$40K for cabinetry, electrical and ventilation (BuildCrux).
• Sterilization and lab: $30K–$70K for dedicated plumbing, ventilation and counters, plus dust collection for a lab (BuildCrux).
• Mechanical room: compressor, vacuum and the network rack. See dental vacuum lines.

Step 4: Sanity-check by scope percentage

BuildCrux publishes a typical split of dental project cost by scope (BuildCrux):

If your plumbing line is 6% of a dental bid, something is probably missing. The same goes for electrical and low-voltage well under 12%. Use the table to find gaps, not to set the price. Your takeoff from the drawings still decides the number.

Step 5: Separate equipment and soft costs

BuildCrux states that equipment is typically owner-supplied at $30K–$60K per operatory, and that total project cost is construction plus equipment plus design fees (BuildCrux). Show clearly what you're excluding. Dentists compare bids, and an "all-in" bid next to a construction-only bid causes confusion. See dental office build-out cost.

Step 6: Contingency and schedule

Dental Management Counsel advises a 10–15% contingency and puts a leasehold build-out at 6–9 months, with permitting delays the most common cause of overruns (Dental Management Counsel). Price general conditions on a realistic duration, not the hoped-for one. GCMM's New York metro timeline is 18–30 weeks from lease signing to opening (GCMM).

Line items that get missed

These are the gaps that show up as change orders later:

• Low-voltage after drywall. GCMM's cabling guide says routing decisions must happen before framing is closed. Running conduit afterward often means opening walls, and firestop work is far more disruptive after construction (GCMM cabling guide). Price low-voltage from a real drop schedule.
• CBCT circuits and data. GCMM specifies a dedicated Cat6A run from the wiring closet to the CBCT unit and coordinates its dedicated 20-amp circuit, lead lining and grounding (GCMM cabling guide). Confirm against the manufacturer's site guide.
• Data and power separation. GCMM routes data in dedicated conduit away from dental unit power wiring (GCMM cabling guide).
• Mid-project upgrades. BuildCrux notes dentists frequently add operatories or upgrade imaging mid-project. It recommends change orders that inherit unit costs from the baseline estimate (BuildCrux). Put your per-op unit price in the contract so the change order is easy to price.
• Inspections. BuildCrux lists sequencing inspections into the schedule as part of estimating discipline (BuildCrux).

On margin, BuildCrux reports dental TI margins of 14–19% on solid bids (BuildCrux). That's one vendor's figure, but useful context if your number comes in far outside it.

Make the estimate live

The build-out cost & timeline calculator (free tool, coming soon) will give owners a ballpark built on the same drivers, so your bid lands in a range they already expect. The permit & inspection tracker (free tool, coming soon) will hold the inspection sequence your general conditions depend on. A Studio plan from the owner defines the low-voltage scope as drop counts and rack location, so you price it once instead of carrying an allowance.

How FloorStack helps

FloorStack is a dental build-out platform that connects owners, contractors and IT. The build-out cost & timeline calculator (free tool, coming soon) will help owners set budgets that match real bids. The permit & inspection tracker (free tool, coming soon) will keep inspections on schedule. Studio turns the technology scope into a priceable device schedule. Also see the Dental Office Construction hub and choosing a dental office contractor.

Free tools for this step

• Build-out cost & timeline calculator (free tool, coming soon): check your bid against owner expectations.
• Permit & inspection tracker (free tool, coming soon): plan the inspection sequence behind your schedule.
• Studio (live, free plan): get a defined low-voltage scope.