Post-Construction Cleaning Time Estimator
Estimate the total cleaning time required after construction or renovation based on square footage, construction type, number of rooms, and crew size.
Formula
Step 1 – Base Area Time:
Tarea = Area (sq ft) × Base Rate (hrs/sq ft)
• Light Renovation: 0.030 hrs/sq ft
• Medium Renovation: 0.050 hrs/sq ft
• Heavy Construction: 0.075 hrs/sq ft
Step 2 – Room Setup Time:
Trooms = Number of Rooms × 0.25 hrs
Step 3 – Window Cleaning Time:
Twindows = Number of Windows × 0.20 hrs
Step 4 – Floor Transition Penalty:
Tfloors = (Floors − 1) × 0.50 hrs
Step 5 – Total Solo Time:
Tsolo = Tarea + Trooms + Twindows + Tfloors
Step 6 – Crew Efficiency Factor:
Efficiency = 1 + (Crew Size − 1) × 0.75
(Each additional cleaner contributes 75% of a solo cleaner's output due to coordination overhead.)
Step 7 – Adjusted Total Time:
Tadjusted = Tsolo ÷ Efficiency
Tscheduled = Rounded up to nearest 0.5 hr
Assumptions & References
- Base rates (0.030–0.075 hrs/sq ft) are derived from industry standards published by the Building Service Contractors Association International (BSCAI) and ISSA Cleaning Industry Management Standard (CIMS).
- Light renovation includes painting, minor patching, and touch-up work; medium includes flooring, drywall, and fixture installation; heavy includes full new builds or major structural changes.
- Room setup time (0.25 hrs/room) accounts for initial inspection, moving equipment, and final walkthrough per space.
- Window cleaning time (0.20 hrs/window) covers both interior and exterior surfaces with post-construction residue (paint overspray, sticker adhesive, concrete dust).
- Floor transition penalty (0.50 hrs per additional floor) accounts for equipment transport, stairwell cleaning, and re-setup time.
- The crew efficiency factor of 0.75 per additional cleaner reflects coordination overhead, shared equipment bottlenecks, and spatial constraints typical in post-construction environments.
- Results are rounded up to the nearest 0.5 hr to support practical scheduling.
- Estimates do not include hazardous material removal (asbestos, lead paint), exterior cleaning, or landscaping cleanup.
- Actual times may vary based on cleaner experience, available equipment, and site-specific conditions.