Interior build-out costs typically range from $50 to $200 per square foot, with many standard commercial tenant improvements landing around $75 to $150. The final price depends on the space’s condition, location, layout, mechanical systems, finishes, and permit requirements.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Basic office build-out | $50/sq ft | $100/sq ft | $150/sq ft | Existing services and modest finishes |
| Retail build-out | $60/sq ft | $125/sq ft | $200/sq ft | Storefront, lighting, and display needs vary |
| Restaurant build-out | $150/sq ft | $250/sq ft | $400+/sq ft | Kitchen equipment, plumbing, and ventilation add cost |
| Medical office build-out | $100/sq ft | $175/sq ft | $300/sq ft | Specialty rooms and clinical systems raise pricing |
What a commercial interior build-out costs per square foot
For a 5,000-square-foot office, a $75-$150 per-square-foot budget equals roughly $375,000-$750,000. A smaller 1,500-square-foot project at $100-$175 per square foot may total $150,000-$262,500 because fixed design, permit, and mobilization expenses are spread over fewer square feet. These ranges generally cover construction and standard finishes, not the purchase of the building or major structural work.
Pricing assumes a U.S. commercial property with ordinary access and no severe environmental or structural problems. A mostly finished second-generation suite may cost less than a bare shell, while a change of use or complete replacement of building systems can push costs above the typical range. Assumptions: standard commercial materials, prevailing local labor rates, and a permitted interior project.
How drywall, HVAC, and electrical shape the contractor quote
Quotes combine trade labor, materials, equipment, and project overhead. The following broad allocations are useful for reviewing a standard office budget; trade scopes overlap, so percentages should not be treated as fixed allowances.
| Quote component | Typical share | Indicative rate | What it may include |
|---|---|---|---|
| Framing and drywall | 15%-25% | $12-$30/sq ft | Interior partitions, insulation, finishing |
| Electrical and lighting | 10%-20% | $8-$25/sq ft | Branch wiring, outlets, fixtures |
| HVAC | 10%-20% | $8-$30/sq ft | Duct changes, controls, balancing |
| Flooring, paint, and ceilings | 15%-25% | $12-$35/sq ft | Finish materials and installation |
| Permits and design | 5%-12% | $5-$25/sq ft | Plans, reviews, inspections, coordination |
Labor charges vary by trade and market; specialty subcontractors may bill around $75-$150 per hour before markup, while general labor can be lower. Ask whether the quote includes general conditions, contractor overhead, contingency, and permit fees.
Which ceiling heights and utility runs raise square-foot pricing
Several project specifications can move a bid substantially. Adding or relocating plumbing more than 50 feet from an existing stack, for example, can require floor cutting, new drainage, and restoration. Moving a wet area is typically more expensive than adding a partition in a dry office.
- HVAC capacity: A space needing more than 1 ton of cooling per 400-600 square feet may require added equipment or ductwork, depending on occupancy and heat loads.
- Ceiling height: Work above 12 feet can call for lifts, longer installation time, and additional safety controls.
- Electrical demand: A commercial kitchen or imaging room with equipment loads beyond ordinary office service may need panel or service upgrades.
- Finish level: Durable commercial carpet tile may run about $4-$10 per square foot installed; custom millwork and premium stone can cost several times more.
Existing capacity and the distance between new fixtures and building services often matter as much as floor area. An early walkthrough by the design and construction team can identify costly utility conflicts before drawings are finalized.
Where office build-outs cost more across U.S. markets
Labor availability, permitting timelines, freight, and local code requirements create regional differences. High-cost coastal metros and dense downtown districts may run about 15%-35% above national midmarket pricing. Smaller cities and rural areas can be 5%-20% below, although limited subcontractor availability or long delivery routes can erase that advantage.
For a standard office budgeted at $100 per square foot in a midmarket city, comparable work might reach $115-$135 per square foot in a high-cost market or fall near $80-$95 in a lower-cost area. These are planning comparisons, not guaranteed adjustments; building condition and project scope can outweigh location. Compare local bids using the same drawings, finish schedule, and inclusions.
Why restaurant and medical interiors exceed basic office rates
Restaurants commonly cost more because they need commercial kitchen equipment, grease management, fire protection, and substantial plumbing and ventilation. A 2,000-square-foot restaurant at $200-$350 per square foot could total $400,000-$700,000 before unusual structural or utility work. Medical offices can also exceed basic office rates when they require procedure rooms, specialized power, handwashing stations, or upgraded air handling.
By comparison, a simple office with existing restrooms and usable HVAC may need only partitions, finishes, and modest electrical changes. A shell space requiring new restrooms and distribution systems is a different scope even when both projects have the same square footage. Use the occupancy and equipment plan—not just the room count—to compare budgets.
Can a phased office build-out reduce the initial outlay
Phasing can lower the first payment when a tenant does not need every room or finish on opening day, but it can increase the eventual total if crews must remobilize or completed areas require protection. One practical approach is to install building-wide infrastructure and code-required work at once, then defer selected furniture, decorative finishes, or nonessential rooms.
Repairing usable ceiling grids, doors, or flooring may also cost less than replacing them. Before keeping old materials, confirm they meet current fire, accessibility, and building requirements. Separate essential opening-day work from optional upgrades in the bid rather than cutting scope without checking code.
When permits, demolition, and delivery add charges
Demolition and haul-away may add about $5-$20 per square foot, depending on the amount of existing construction, disposal rules, and access. A high-rise suite with limited loading hours may require more labor and coordination than a ground-floor unit. Permit fees vary by jurisdiction and project valuation; plan review, inspections, and required engineering can add several thousand dollars or more.
Potential hazardous materials, such as asbestos in older buildings, require testing and qualified abatement before ordinary demolition. Fire alarm changes, sprinklers, accessibility corrections, and electrical service upgrades may also appear as separate allowances. Request written clarification on demolition, disposal, permit responsibility, and hidden-condition allowances.
How three project scopes compare at different sizes
These examples show how scope changes the total, even when square footage is similar. They assume ordinary access and exclude business equipment, rent, and financing costs.
| Example | Scope | Rate | Estimated total |
|---|---|---|---|
| Small office, 1,500 sq ft | Partitions, paint, flooring, limited electrical | $90-$140/sq ft | $135,000-$210,000 |
| Retail suite, 3,000 sq ft | Lighting, sales floor, fitting rooms, modest storefront work | $110-$190/sq ft | $330,000-$570,000 |
| Restaurant, 2,000 sq ft | Kitchen, ventilation, plumbing, dining finishes | $200-$350/sq ft | $400,000-$700,000 |
For comparable bids, require each contractor to price the same square footage, allowances, finish grades, and equipment responsibilities. A low headline rate may exclude design, permits, utility upgrades, or owner-selected fixtures, so compare the complete project total.