The back-of-house spaces in commercial buildings are where cleaning programs quietly fail. Janitor closets accumulate spilled chemicals. Storage rooms develop dust layers that get airborne when anyone touches them. Mechanical rooms collect leaves blown in from rooftop vents. IT closets gather cable insulation crumbs and dust on every server. None of these areas show up in customer-facing photos. All of them affect the building over time in ways that surface as bigger problems later.
This guide is about the back-of-house cleaning that gets skipped, why it matters, and how to build it into a cleaning program without breaking the budget.
The back-of-house spaces commercial buildings tend to forget
Common BOH spaces:
- Janitor closets. Where cleaning supplies live. Often the dirtiest space in the building because it accumulates the chemicals being used everywhere else.
- Storage rooms. File storage, supply storage, holiday decoration storage. Rarely entered, accumulate dust and pest evidence.
- Mechanical rooms. HVAC equipment, water heaters, electrical panels. Often have outside air infiltration that brings in leaves, pollen, debris.
- IT and telecom closets. Server racks, network equipment. Sensitive to dust and overheating; cleaning protects equipment.
- Loading dock and back entrance. Receives deliveries, accumulates debris from trucks, weather.
- Roof access areas and stairwells. Used periodically; dust accumulates between uses.
- Trash and recycling rooms. Should be cleaned but often skipped because they are already messy.
- Employee back-entrance areas. Lockers, break rooms, time clock area. Lower customer scrutiny but daily employee impact.
- Outdoor smoking areas. Cigarette debris, ash accumulation.
- Parking lot and exterior walkway. Litter, snow piles in winter, leaf accumulation in fall.
Most cleaning contracts include the customer-facing spaces explicitly and treat back-of-house as “as needed.” Without specific scope, “as needed” becomes “never.”
Why back-of-house cleaning matters
Several specific reasons:
Air quality. Dust accumulating in storage rooms and mechanical spaces gets pulled into HVAC and distributed through the building. Cleaning back-of-house improves air quality everywhere.
Pest control. Pests start where humans rarely go. Storage rooms with accumulated food crumbs, paper, or debris are pest nurseries. By the time pests are visible in customer areas, the back-of-house has been infested for months.
Equipment longevity. Dust on HVAC equipment, IT equipment, and motors shortens equipment life and increases maintenance costs. Periodic cleaning is cheaper than premature replacement.
Fire safety. Combustible material accumulating in mechanical rooms (paper, dust on motors) creates fire risk. Mechanical rooms specifically should be kept clear of stored materials.
Compliance and audits. Many regulatory inspections (OSHA, fire marshal, health) cover back-of-house. A messy janitor closet is an OSHA citation; cleaning chemicals stored without labels is another.
Employee experience. Employees see back-of-house all day. A clean break room and locker area improves morale; a dirty one quietly erodes it.
Property value. Buildings that show well in front and back command higher rents and resale values than buildings that are presentable only in customer areas.
BOH cleaning schedule
Different BOH spaces need different frequencies:
Daily:
- Trash and recycling room (empty bins, hose down floor if liquid spills)
- Janitor closet (return tools to clean state, replenish supplies)
- Employee break room and bathroom
- Loading dock floor (sweep, address any spills)
Weekly:
- Storage room spot cleaning (any visible mess or debris)
- Stairwell sweep
- Outdoor smoking area cleanup
- Parking lot litter pickup
- Outdoor walkway sweep
Monthly:
- Janitor closet full clean (shelving wiped, floor mopped, supply inventory)
- Storage room dust and organize
- Mechanical room sweep and visible dust removal
- IT closet vacuum (gentle, around equipment)
- Loading dock detail (high-pressure if needed)
Quarterly:
- Full BOH deep clean: every space gets attention
- Pest inspection points checked
- Equipment dust removal in mechanical and IT spaces
- Storage organization (purge expired or obsolete inventory)
- Outdoor area deep clean (power wash, planting bed maintenance)
The janitor closet specifically
The janitor closet is the most-overlooked space. It is also the highest-leverage place to invest in cleaning:
- If the janitor closet is organized, cleaning happens more efficiently throughout the building
- If chemicals are properly stored and labeled, OSHA compliance is automatic
- If MSDS sheets are accessible, emergency response is faster
- If supply inventory is visible, restock is predictable
- If the closet itself is clean, the cleaning crew operates from a baseline of cleanliness rather than mess
Janitor closet baseline expectations:
- All chemicals in labeled containers, original or compliant secondary labels
- MSDS or SDS sheets posted or in accessible binder
- Eye wash station (if required) functional and inspected
- Mop and bucket storage organized; mops air-dried after use
- Microfiber and rag storage (separated clean and dirty)
- Vacuum and equipment stored neatly
- No food, no personal items, no cardboard or paper accumulation
- Floor mopped (cleaners deserve a clean floor too)
- Walls and shelving free of chemical splatter
Adding BOH cleaning to an existing contract
If your current contract does not specifically include back-of-house cleaning, add it. Options:
Negotiate as scope addition. Most cleaning companies will add BOH coverage with minor pricing adjustment. The work is not large in time; it just needs to be explicitly scoped.
Schedule as periodic deep clean. Monthly or quarterly BOH-focused visits handled as part of deep clean cycle.
Coordinate with other vendors. Some BOH work overlaps with HVAC technicians, pest control, IT contractors. Coordinate so each vendor handles their scope.
The cost of adding BOH cleaning is usually small compared to the consequences of not doing it.
What to ask cleaning companies about BOH
- Does your standard scope include back-of-house, or is that an add-on?
- What is your cleaning frequency for janitor closets, storage rooms, and mechanical spaces?
- Do you handle outdoor cleaning (smoking areas, loading dock, parking lot litter)?
- How do you handle hazardous waste or unusual cleaning chemistry storage?
- Do you provide MSDS/SDS sheets for the chemistry you use in our facility?
- Can you partner with our pest control vendor for the BOH spots they flag?
E & J Cleaning includes back-of-house in our standard commercial cleaning scope for Long Island facilities. Janitor closets, storage rooms, mechanical spaces, IT closets, loading docks, and outdoor areas all on the cleaning schedule. Visit our commercial cleaning service page or call 1-877-443-2635 to discuss your facility.
Frequently Asked Questions
What back-of-house spaces are most overlooked in commercial cleaning?
Janitor closets (where cleaning chemicals live), storage rooms, mechanical rooms, IT/telecom closets, loading docks, employee back entrances, trash rooms, and outdoor areas like smoking spots and walkways.
Why does back-of-house cleaning matter?
Air quality (dust gets pulled into HVAC), pest control (pests start where humans do not go), equipment longevity, fire safety (combustible accumulation), OSHA compliance, employee morale, property value.
How often should the janitor closet be cleaned?
Daily basic return-to-clean-state by the cleaning crew. Monthly full clean (shelving wiped, floor mopped, supply inventory). Plus continuous compliance items: labeled chemicals, MSDS/SDS posted, eye wash functional.
Should I add back-of-house cleaning to my current contract?
Yes if not already explicitly included. Cost is small relative to consequences of not doing it. Negotiate as scope addition, schedule as periodic deep clean, or coordinate with HVAC and pest vendors for partial coverage.
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