Seed Eco-Home Optimized Build Time

May 1 Labor Target – Phase Breakdown (1,000 ft² Seed Eco-Home)

Assumptions:

• Repeatable design, low roof complexity
• Tight logistics (kitted, staged materials)
• Minimal rework
• Utilities not extreme
• KPI = On-site person-hours (track prefab separately if applicable)

A) Site Prep & Foundation

• Scope: layout, excavation, foundation system, backfill/rough grade
• Target: 70–110 hours

B) Structural Shell

• Scope: floor (if any), walls, roof, sheathing, WRB, dry-in
• Target: 120–170 hours

C) Exterior Close

• Scope: windows/doors, roofing, siding/cladding
• Target: 60–90 hours

D) MEP (Mechanical, Electrical, Plumbing)

• Scope: plumbing + electrical + HVAC rough/trim (simplified routing assumed)
• Target: 100–150 hours

E) Insulation & Air Sealing

• Scope: insulation install, air sealing details
• Target: 20–35 hours

F) Interior Finishes

• Scope: wall finish, paint, flooring, cabinets/trim, fixtures/appliances
• Target: 110–170 hours

G) Commissioning, Punch, Cleanup

• Scope: system checks, punch list, final clean
• Target: 20–25 hours

Totals

• Low-end total: 500 hours
• High-end total: 750 hours

Measurement Protocol

• Headline KPI: On-site person-hours (every human hour on site counts)
• Include: supervisors, material handling, cleanup, rework, waiting
• Exclude from headline (track separately): design/engineering, procurement/admin, marketing/sales
• Optional secondary KPI: Total person-hours including off-site prefab

Build-Day Scorecard

Phase	Actual Hours	Target	Variance
A) Site & Foundation		70–110
B) Structural Shell		120–170
C) Exterior Close		60–90
D) MEP		100–150
E) Insulation & Air Sealing		20–35
F) Interior Finishes		110–170
G) Commissioning		20–25
TOTAL		500–750