Buyers typically see a wide range in the total cost to build a four-unit multifamily project. Main cost drivers include land, permitting, materials, labor, and site work. The cost to deliver a 4-plex hinges on location, design, and construction standards.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Total project cost | $1,000,000 | $1,500,000 | $2,200,000 | Assumes mid-range finishes and permitting in a metro area |
| Per-unit cost | $250,000 | $375,000 | $550,000 | Includes foundations, structure, envelopes, and interiors |
| Per-square-foot | $140/sq ft | $190/sq ft | $260/sq ft | Assumes 2,800–3,500 sq ft total |
| Land & site work | $150,000 | $250,000 | $420,000 | Includes utilities, grading, and drainage |
| Permits & fees | $20,000 | $40,000 | $80,000 | Depends on jurisdiction and project scope |
| HVAC, electrical, plumbing | $80,000 | $140,000 | $230,000 | System sizing for four units; high-efficiency options raise costs |
| Finishes & fixtures | $60,000 | $110,000 | $180,000 | Mid-range vs upscale materials |
| Contingency | $40,000 | $80,000 | $150,000 | Typically 5–10% of hard costs |
Assumptions: region, specs, labor hours.
Overview Of Costs
Cost ranges shown reflect typical four-unit multifamily builds in the United States, including site work and common-area finishes. The total project cost depends on plot size, unit layout, and local construction rates. The table below summarizes total ranges and per-unit ranges with brief assumptions.
Cost Breakdown
Understanding where money goes helps identify budget risks and potential savings. The following table illustrates major cost buckets and typical shares for a four-unit project.
| Category | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials | $350,000 | $600,000 | $1,000,000 | Structural, envelope, interior finishes |
| Labor | $320,000 | $520,000 | $900,000 | Trades, supervision, trades-hours |
| Equipment | $40,000 | $80,000 | $150,000 | Temporary and long-term equipment |
| Permits | $20,000 | $40,000 | $80,000 | Local code approvals |
| Delivery/Disposal | $15,000 | $30,000 | $60,000 | Construction waste management |
| Warranty & Contingency | $25,000 | $50,000 | $100,000 | Owner protection against defects |
| Taxes | $10,000 | $25,000 | $50,000 | Property and transfer taxes varies by state |
What Drives Price
Price variation follows key drivers such as land cost, project size, and construction standards. Land cost and local permitting rules create regional gaps, while choices like framing type, roof pitch, and energy efficiency features affect both initial and ongoing costs. For a four-unit building, bigger footprints and higher-end finishes push the total up quickly.
Labor, Hours & Rates
Labor costs reflect crew size, local wage levels, and project duration. A typical four-unit project may require several trades over 9–14 months, depending on site constraints. Labor hours and local skilled-trade rates are among the largest single-cost contributors in many markets.
Regional Price Differences
Prices vary by region, with urban cores typically higher than suburban or rural areas. In a three-region comparison, expect typical delta ranges to be ±15–25% from the national average for total costs, driven by land costs, permitting complexity, and labor markets.
Real-World Pricing Examples
Three scenario cards provide practical framing for budgeting a four-unit project. Each scenario includes specs, assumed hours, per-unit pricing, and totals.
-
Basic Scenario — 4-unit building, standard vinyl siding, mid-range interiors, 1,200–1,400 sq ft per unit, concrete slab, moderate site work.
Assumptions: region, specs, labor hours. -
Mid-Range Scenario — 4-unit with brick accent, granite in kitchens, enhanced insulation, 1,400–1,600 sq ft per unit, moderate land preparation.
Assumptions: region, specs, labor hours. -
Premium Scenario — high-end finishes, energy-efficient systems, larger footprint, higher land costs, 1,600–1,900 sq ft per unit.
Assumptions: region, specs, labor hours.
Example totals (illustrative, USD):
- Basic: Total $1,000,000–$1,300,000; per unit $250,000–$325,000; $/sq ft $140–$180.
- Mid-Range: Total $1,400,000–$1,850,000; per unit $350,000–$462,000; $/sq ft $160–$210.
- Premium: Total $1,900,000–$2,400,000; per unit $475,000–$600,000; $/sq ft $190–$260.
Cost By Region
Regional contrasts affect land value, permitting timelines, and labor rates. A typical suburban market may sit near the average, while urban markets push totals higher and rural markets often reduce costs through lower land and wages.
What To Include In Bids
When evaluating bids, compare hard costs (materials, labor, equipment) and soft costs (permits, design fees, inspections). A robust bid should itemize major work packages and provide a clear contingency allowance. Budget discipline helps avoid overruns in volatile markets.
Savings Playbook
Strategies to reduce the cost to build a 4-plex include optimizing unit mix, standardizing components across units, and locking in prices through early contractor involvement. Consider phased site work or modular elements to spread risk and cash flow.
