Homebuyers and investors typically see wide ranges for quadruplex projects, driven by site conditions, design choices, and local labor costs. The main cost drivers are land access, building size per unit, foundation type, and utility connections. This article provides practical pricing ranges in USD to help plan budgets and compare bids, with explicit cost components and regional considerations. Cost and price language is used throughout to align with common search intent.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Site prep & grading | $6,000 | $12,000 | $28,000 | Site access, drainage, utility trenching |
| Foundation & framing (4 units) | $180,000 | $320,000 | $520,000 | Footings, concrete slabs or basement; framing lumber |
| Exterior structure | $100,000 | $210,000 | $380,000 | Siding, roofing, exterior doors/windows |
| Interior finishes | $160,000 | $320,000 | $620,000 | Drywall, paint, flooring, cabinets, fixtures |
| Mechanical, electrical & plumbing | $120,000 | $240,000 | $480,000 | HVAC, water heaters, wiring, plumbing runs |
| Permits & fees | $8,000 | $20,000 | $40,000 | Building, septic/sewer, impact fees |
| Delivery, disposal, miscellaneous | $6,000 | $14,000 | $32,000 | Material transport, Waste removal |
| Contingency (budget cushion) | $20,000 | $40,000 | $90,000 | Typically 5–15% of hard costs |
| Taxes & financing | $12,000 | $28,000 | $60,000 | Interest, carrying costs, occupancy tax |
| Total project range | $512,000 | $1,014,000 | $2,226,000 | Assumes 4 detached or attached units; mid-range finishes |
Assumptions: region, project size, finish level, and labor hours.
Overview Of Costs
Quadruplex projects generally span a wide range in total cost, from modest mid-range builds around $1.0 million to higher-end projects exceeding $2.0 million, depending on unit size and site conditions. The per-unit pricing often falls within $250,000 to $700,000 per unit for mid-range specs. The main drivers are foundation type (slab vs crawlspace vs full basement), wall assemblies, and utility connections. Total project ranges include land preparation, structure, finishes, and essential systems, while per-unit ranges help benchmark bids against a uniform standard.
Cost Breakdown
| Columns | Materials | Labor | Equipment | Permits | Delivery/Disposal | Warranty |
|---|---|---|---|---|---|---|
| Concrete, framing, and structural | $180,000 | $120,000 | $25,000 | $8,000 | $10,000 | $6,000 |
| Exterior & interior finishes | $240,000 | $110,000 | $8,000 | $5,000 | $6,000 | $8,000 |
| Mechanical, electrical, plumbing | $120,000 | $110,000 | $15,000 | $10,000 | $6,000 | $6,000 |
| Site & permits | $40,000 | $20,000 | $0 | $20,000 | $6,000 | $0 |
| Contingency & taxes | $40,000 | $20,000 | $0 | $0 | $0 | $8,000 |
Pricing Variables
Key drivers include unit size, foundation choice, and exterior finish. For example, larger units (1,000–1,200 sq ft each) raise interior finish costs, while a full basement or crawlspace adds significant foundation and drainage work. A higher-end exterior siding or roof with better insulation also increases price. Regional labor rates can swing bids by 10–25% versus national averages.
data-formula=”labor_hours × hourly_rate”> Regional price differences matter: urban cores tend to be higher due to labor and permitting, suburban sites moderate, rural sites often cheaper but with access trade-offs.
Labor, Hours & Rates
Labor costs for a quadruplex typically cover framing, mechanical rough-ins, drywall, and finishes. A mid-range project may require 18–28 weeks of work with a crew size of 8–12 during peak phases. If labor is a bottleneck, expect longer schedules and higher labor overruns.
Ways To Save
Budget-conscious strategies include modular or prefab components for modular units, simplified floor plans with standardized cabinetry, and selecting durable yet cost-efficient materials. Sourcing within a regional supply chain and coordinating multiple trades to reduce rework can trim soft costs by several percent.
Regional Price Differences
Three representative regions illustrate pricing deltas:
- West Coast metro areas: often 15–25% higher than the national average due to labor and permitting.
- Midwest suburban: around 5–15% above or below national averages, depending on material costs.
- South and rural areas: typically 0–10% below national averages, with potential trade-offs in services.
Real-World Pricing Examples
Three scenario cards illustrate typical quotes with varying specs. Assumptions: region, unit size, finish level.
- Basic Quadruplex
- Units: 900 sq ft each, slab foundation, standard framing, vinyl siding
- Labor: 18 weeks, 8 workers
- Costs: Materials $460,000; Labor $280,000; Permits $20,000; Delivery $12,000; Contingency $40,000
- Total: about $1,012,000; per unit: ~$253,000
- Mid-Range Quadruplex
- Units: 1,000 sq ft each, crawlspace, mid-range finishes
- Labor: 22 weeks, 10 workers
- Costs: Materials $640,000; Labor $360,000; Permits $28,000; Delivery $16,000; Contingency $70,000
- Total: about $1,114,000; per unit: ~$278,500
- Premium Quadruplex
- Units: 1,150 sq ft each, basement, high-end finishes
- Labor: 26 weeks, 12 workers
- Costs: Materials $780,000; Labor $520,000; Permits $40,000; Delivery $20,000; Contingency $95,000
- Total: about $1,455,000; per unit: ~$363,750
These scenarios provide concrete benchmarks for bid comparison and planning. Notes: regional differences and site-specific factors will shift outcomes.