How much does it cost to build apartments?
There is no single national figure for apartment construction costs. The total depends on gross floor area, unit mix, structural type, site conditions and local labor, so the honest answer is a line-item build-up: we price each CSI MasterFormat division from your drawings, adjust with published wage and price data, and show the arithmetic.
What Apartment Construction Costs Actually Include
Apartment construction costs are a stack of priced line items, not a single rate. Each line in a multifamily budget carries three things: a unit of measure, a measurement rule that says what gets counted, and a source for the rate. Strip any of the three away and the number stops being auditable.
We organize the stack by CSI MasterFormat division so the estimate maps onto the bid package a contractor will actually receive. A line such as Division 03 cast-in-place concrete is priced per cubic yard of footing and slab volume, while Division 09 gypsum board is priced per square foot of wall area net of openings. The unit tells you how the quantity was taken off; the rule tells you what was excluded.
Readers asking how much does it cost to build apartments usually want one figure. The honest answer is that apartment building cost per square foot only means something once you name the building type, the parking count and whether land is inside the number.
Hard costs, soft costs, and land
Hard costs are the physical work: site work, structure, envelope, mechanical, electrical, plumbing, fire protection and interior finishes. Site work alone covers grading and excavation, utility trenching, paving and storm drainage, and it is often the least predictable line on a greenfield parcel. General conditions sit alongside the trade packages and carry supervision, temporary power, scaffolding, dumpsters and builder's risk insurance.
Soft costs are the non-physical line items: design fees, permit fees, legal, financing, developer overhead and the construction contingency. They are usually carried as a percentage of hard cost, which means an error in the hard-cost base propagates straight through the soft-cost block. Our page on hard costs vs soft costs breaks the boundary between the two.
Land is a separate line and should never be blended into construction cost per square foot. Keep it in its own row so the lender and the equity partner can see the split.
Where each line item comes from
Every rate we publish is a national average unit cost adjusted with published U.S. Bureau of Labor Statistics wage and price data, then reviewed by an estimator. The wage table below shows current median hourly wages for the trades that dominate multifamily labor, and the chart below tracks producer price movement for lumber, ready-mix concrete, steel mill products and copper wire and cable. Those four commodities touch Division 03 concrete, Division 05 metals and Division 16 electrical directly.
The takeoff supplies the quantity; the data supplies the rate; the arithmetic is shown so you can test it. When we deliver a workbook, each row carries its unit, its measurement rule and the source index it was priced from. If you want that structure applied to your drawings, send your plans and we will quote the fee after review.
Apartment Construction Costs by Building Type and Unit Mix
A cost to build an apartment complex is not transferable between structural systems. Type V wood frame over a slab, Type III podium construction and Type I high-rise concrete differ in foundation, framing, fire separation and vertical transportation. Each change moves both the numerator and the denominator of the cost ratio.
Apartment construction cost per square foot by state also shifts because labor rates, seismic and wind requirements, and local permit fees vary. A spread footing schedule in a high-frost state is deeper than the same building in a mild climate, and Division 03 concrete quantities follow. Our construction cost per square foot reference explains how we build the denominator before applying any rate, and the same quantity takeoff discipline carries into a residential construction cost estimate for the wood-frame portions.
Garden-style vs. podium vs. high-rise
Garden-style wood frame buildings are typically three to four stories on surface parking, with shallow spread footings and repetitive stick framing. Podium construction puts one or two concrete levels below five stories of wood, which adds post-tension slab work, transfer beams and a longer Division 03 and Division 05 scope. High-rise concrete adds elevators, a fire pump, standpipes and a curtain wall, all of which carry large fixed costs that do not shrink with unit count.
Parking is the quiet driver. Structured parking below the building can add substantial area with no rentable square feet attached to it, which inflates cost per rentable foot while leaving cost per unit comparatively stable. Ask for the parking ratio before you compare two per-square-foot figures.
How unit mix and common area shift cost per unit
A studio and a three-bedroom share the same corridor, elevator and roof, so the fixed-cost load per dwelling unit falls as units get larger. Leasing offices, fitness rooms, clubrooms and mail rooms add gross floor area without adding units, pushing cost per unit up while cost per rentable foot moves the other way. Soft costs follow the same split because design fees scale with area and financing scales with total budget.
When you compare bids, fix the unit mix, the common-area program and the parking count first. Then compare the line-item detail. Our multi-family estimating services page describes how we structure that comparison.
A Worked Example: Apartment Construction Costs for a 100-Unit Podium Building
The example below is illustrative. It uses a 100-unit, 110,000 gross-square-foot podium building with five wood-frame levels over one concrete level, surface and podium parking, and no land in the budget. The base hard cost of $185.00 per square foot is an illustrative input, not a quoted rate; substitute your own from a bid or a prior project.
Step one is the hard-cost base: 110,000 sq ft × $185.00 = $20,350,000. Step two applies soft costs at 18%: $20,350,000 × 0.18 = $3,663,000. Step three applies contingency at 8% of hard cost: $20,350,000 × 0.08 = $1,628,000. Step four applies escalation at 4% of the hard-cost base: $20,350,000 × 0.04 = $814,000. The budget total is $20,350,000 + $3,663,000 + $1,628,000 + $814,000 = $26,455,000, which is $240.50 per square foot all-in and $264,550 per unit.
The calculator below runs the same arithmetic on your inputs: building area, your base hard cost per square foot, soft-cost percentage, contingency percentage and escalation percentage. It returns hard cost, soft costs, contingency, escalation, budget total and all-in cost per square foot. It holds no prices of its own, so the output is only as good as the base rate you enter.
A multifamily construction cost breakdown of this building would show Division 03 concrete concentrated in the podium slab and spread footings, Division 05 metals in the structural steel and deck at the transfer level, and general conditions running through every month of the schedule. Wood frame vs concrete apartment cost usually turns on those three lines plus the elevator package. For a line-item version on your own drawings, request a quote or review our apartment estimating services.
| Line | Basis | Arithmetic | Amount |
|---|---|---|---|
| Hard cost base | 110,000 sq ft × $185.00/sq ft | 110,000 × 185.00 | $20,350,000 |
| Soft costs | 18% of hard cost | 20,350,000 × 0.18 | $3,663,000 |
| Contingency | 8% of hard cost | 20,350,000 × 0.08 | $1,628,000 |
| Escalation | 4% of hard cost | 20,350,000 × 0.04 | $814,000 |
| Budget total | Sum of the four lines | 20,350,000 + 3,663,000 + 1,628,000 + 814,000 | $26,455,000 |
| All-in cost per sq ft | Total ÷ gross area | 26,455,000 ÷ 110,000 | $240.50 |
| All-in cost per unit | Total ÷ 100 units | 26,455,000 ÷ 100 | $264,550 |
Square-foot budget calculator
- Hard cost
- $444,000
- Soft costs
- $53,280
- Contingency
- $49,728
- Escalation
- $21,880
- Budget total
- $568,888
- All-in per sq ft
- $237
Enter your own base rate from a recent bid, cost book or estimator. The default values are placeholders for the math, not market prices.
What Drives Apartment Construction Costs Up or Down?
Apartment construction costs move on a handful of decisions that are made long before a bid package lands on a desk. Each one lands on a named line item, so you can trace a swing in the budget back to the choice that caused it. The drivers below are the ones that most often separate a low apartment construction cost per unit from a high one on comparable sites.
A geotechnical report is the first cost document, not the last. Rock, fill, high groundwater, or expansive clay can turn spread footings into drilled shafts or over-excavation and import, and those items sit in Division 31 earthwork and Division 03 concrete. On a tight urban lot, the parking ratio does the same damage: one structured level of cast-in-place or post-tension slab parking can carry a cost per stall several times that of surface parking, and it adds excavation, shoring, and fire separation between parking and dwelling units.
| Driver | Primary line item | Unit of measure | What to check in the estimate |
|---|---|---|---|
| Poor soils or rock | Division 31 earthwork; Division 03 footings | CY excavated, CY concrete, tons rebar | Geotech recommendation referenced on the footing takeoff |
| Structured parking | Division 03 post-tension slab; Division 05 reinforcing | SF of deck, stalls per unit | Stalls per dwelling unit stated with the deck area |
| Structural system | Division 05 structural steel or Division 03 concrete frame | Tons, CY, SF of floor area | Frame type matches the code construction type |
| Exterior wall | Division 07 thermal and moisture; Division 09 finishes at soffits | SF of wall area | Sheathing and barrier included, not just cladding |
| MEP system choice | Division 15 mechanical; Division 16 electrical | Tons of cooling, amperage, fixtures | System type and unit count stated per building |
| Schedule length | General conditions and general contractor overhead | Months | Monthly carry multiplied by the stated duration |
| Commodity escalation | Divisions 03, 05, 06, 16 | Percent applied to base cost | Allowance tied to named commodity indexes |
Site conditions and parking
Grading and excavation quantities follow the geotechnical report, and the report's bearing recommendation sets the footing schedule. Where the soils memo calls for a mat or deep foundations, the Division 03 concrete line moves in both concrete volume and reinforcing tonnage. Structured parking is the second lever: count stalls per dwelling unit, then price the deck, the retaining walls, and the ventilation in Division 15 mechanical. A site that fits surface parking at the same unit count will show a materially lower apartment construction budget line items total than a podium scheme with two below-grade levels.
Structure, envelope, and MEP
Type III and Type V wood frame over a concrete podium is common through four and five stories, while taller buildings switch to concrete or steel and gain cost in Division 05 metals and the crane and schedule that go with it. Exterior wall type follows the structure: brick veneer, fiber cement, or stucco differ in sheathing, weather barrier, and scaffolding time. Mechanical and electrical system choices move the largest single block after structure. A central plant with fan coils, a split-system layout, or a packaged terminal unit each changes the Division 15 mechanical scope, and the service size, metering arrangement, and unit panel count change Division 16 electrical.
Labor market and schedule
Crew wages are set by trade and region, and the wage table below shows the national medians the pricing is benchmarked against. Prevailing wage requirements on publicly assisted projects reset those rates upward and should be flagged on the estimate cover, not buried in a labor line. Schedule length drives general contractor overhead, supervision, temporary power, and builder's risk insurance premiums, because each is carried per month. Escalation is the last driver: lumber, ready-mix, steel, and copper wire each move on their own index, so a bid priced today and bought out eight months later needs an escalation allowance tied to the specific commodities in the package.
How to Check an Apartment Estimate Line by Line
A line-by-line review takes an afternoon and catches most of the errors that survive into a construction loan budget. Start with the basis of each line, then re-run the arithmetic, then test the contingency against how mature the design actually is. The same routine works whether you are reviewing a conceptual estimate at schematic design or a full takeoff from construction documents, and it is the same discipline behind professional estimating by project type.
Before any multiplication, confirm the unit basis. Concrete priced per cubic yard, formwork per square foot of contact area, drywall per square foot of wall face, and paint per square foot of finished surface are four different denominators, and mixing them inflates or deflates the total without any visible error. Write the unit and the measurement rule next to each line so a reviewer can reproduce it.
| Check | What to verify | Failure mode if missed |
|---|---|---|
| Unit basis | CY, SF of contact area, SF of wall face, or per unit stated | Quantities multiplied by the wrong rate |
| Measurement rule | Gross floor area vs rentable square feet; slab-to-slab vs floor-to-ceiling | Wall and finish quantities off by height |
| Quantity re-multiply | Each quantity times its unit rate | Subtotal error carried into the summary |
| Derived quantity | Studs, sheathing, fixtures, and devices checked per unit | Understated material in wood frame |
| Waste factor | Percentage stated and applied to material only | Double-counted waste in labor |
| Soft cost lines | Permit fees, builder's risk insurance, design fees shown separately | Hard and soft costs blended |
| Contingency | Matches the AACE estimate class of the documents | Budget too thin for the design stage |
Contingency range by estimate class
- Low contingency
- $150,000 (10%)
- High contingency
- $300,000 (20%)
- Budget range
- $1,650,000 – $1,800,000
Typical planning ranges that follow the AACE estimate-class idea: less design, more contingency. Set the final figure from a risk review of your own project.
Unit and measurement rule checks
Confirm whether floor area is gross floor area or rentable square feet, and whether the residential takeoff runs slab-to-slab or floor-to-ceiling. Wall heights, door and window counts, and Division 09 finishes quantities all change with that single decision. Check that the building footprint is counted once per floor and that balconies, corridors, and amenity space are either included or excluded by a stated rule. For a cost to build a 100 unit apartment building, the unit count and the mix of one-, two-, and three-bedroom units should reconcile to the unit schedule on the drawings.
Arithmetic and quantity cross-checks
Re-multiply every quantity by its rate and re-add the subtotals; a spreadsheet error in one Division 15 mechanical line can hide for weeks. Cross-check derived quantities against a second source: studs per wall area, sheathing per exterior wall face, fixtures per dwelling unit, and devices per unit for Division 16 electrical. Confirm that waste factor is applied to material only and stated as a percentage, and that wood frame packages show the lumber index date used for pricing. Then look at the soft side: permit fees, builder's risk insurance, and design fees should appear as separate lines, with the split between apartment hard costs vs soft costs visible on the summary. The calculator below takes a base estimate and an AACE estimate class from 5 to 1 and returns a low and high contingency with the resulting budget range, so you can compare the contingency carried in the estimate to the range the class implies.
Apartment Estimating Services and Multi-Family Estimating Services: When to Bring Help In
Outsourced estimating fits three situations well: a feasibility round that needs a defensible number in days, a bid-level takeoff that has to reconcile to a schedule of values, and a second-opinion check on an estimate prepared elsewhere. In each case the deliverable is the same: a quantity takeoff with units, rates, and sources you can audit.
Feasibility work is the most common trigger. A developer comparing three sites needs a conceptual estimate at AACE Class 4 or 5 that separates apartment hard costs vs soft costs clearly enough to test against rents and loan terms. At that stage the takeoff is driven by gross floor area, unit count, and building type, and the assumptions belong on the page where a lender can read them. When the design reaches schematic design, the estimate should tighten to Class 3 with a measured structure and envelope.
Bid-level support is the second trigger. Once construction documents are issued, the takeoff has to be complete enough to compare subcontractor quotes line by line, with Division 16 electrical priced by device and fixture count and Division 15 mechanical priced by system type and capacity. A takeoff that arrives with marked-up drawings lets your precon team see exactly which sheets each quantity came from. Our apartment estimating services cover that scope, and the multi-family estimating services group handles the same work across a portfolio of building types. If you are comparing building systems, the podium construction decision is the one to settle first, because it changes structure, fire separation, and parking at once.
The third trigger is a second opinion. A contingency that looks thin at Class 3, or a soft cost allowance that omits builder's risk insurance, is easier to catch when someone rebuilds the numbers independently. Send the drawings and the current estimate, and the review returns the differences with the arithmetic shown. You can send your plans through the quote page when you are ready to compare scopes.
Frequently Asked Questions
How much does it cost to build an apartment building per square foot?
There is no single national figure, because apartment construction costs per square foot move with building type, unit mix, region and finish level. A garden-style Type V walk-up and a Type I high-rise share almost no line items beyond site work. We build the number from a quantity takeoff by CSI division, then adjust unit costs with published wage and producer price data.
What is the difference between apartment hard costs and soft costs?
Hard costs are the physical work: Division 03 concrete, Division 05 metals, Division 09 finishes, Division 15 mechanical and Division 16 electrical, plus site work. Soft costs cover design fees, permits, builder's risk insurance, legal and financing. General conditions and general contractor overhead sit between the two, and the split changes how a lender reads the draw schedule.
How many square feet per unit should I assume for a multifamily estimate?
Use gross floor area, not rentable square feet, and take the number from the drawings. Typical ranges run about 700 to 1,000 square feet per dwelling unit for one-bedrooms and larger for two-bedrooms, with common area and corridor added on top. A 100-unit building at 950 gross square feet per unit is 95,000 square feet before parking.
Why is cost per unit higher for high-rise apartments than garden-style?
High-rise cost per unit climbs because the structure carries more load, the foundation and podium are heavier, and life-safety systems expand. Type I concrete with a post-tension slab needs more Division 03 and Division 05 work than Type V wood frame. Elevators, standpipes and fire separation add scope that a three-story walk-up never carries.
What contingency percentage should an apartment construction estimate carry?
Contingency tracks design maturity, not habit. A conceptual estimate at schematic design carries more than a bid package built from construction documents. Owners often hold a separate owner's contingency for scope changes and a construction contingency inside the schedule of values. Set the percentage with your lender and design team, then reduce it as drawings tighten.
How do parking and amenity space change apartment construction costs?
Both add gross floor area that earns no rent, so they raise cost per rentable square foot even when cost per gross square foot holds. A post-tension podium over structured parking adds concrete, waterproofing and mechanical ventilation. Amenity space adds Division 09 finishes, plumbing fixtures and electrical load that a plain corridor does not.
How do you check apartment construction costs line by line?
Start with the unit of measure and the measurement rule on each line, then confirm the quantity against the drawings. Check that the waste factor is stated, that general conditions are itemized rather than lumped, and that the schedule of values matches the draw schedule. Every line should name its source, including the wage and price data behind the unit cost.
Can you use my estimate template?
Send the template with the plans and we confirm whether the estimate can be delivered in it. Format matters less than the takeoff behind it, so we review the template alongside the drawing set before quoting the fee.