What Is Common Area?
Common areas are the shared spaces tenants use but don't rent exclusively—hallways, lobbies, stairwells, laundry rooms, parking lots, landscaping, and often the roof. In multifamily, the landlord is responsible for maintaining them. Budget for common area expenses as part of operating expenses—typically 5–15% of gross rent depending on property size and amenities. In commercial leases, tenants often pay common area maintenance (CAM) charges—their share of taxes, insurance, and upkeep for shared spaces. Common areas affect property value: well-maintained lobbies and grounds support higher rents; neglected ones drive turnover. ADA compliance, lighting, and safety in common areas are legal requirements you can't skip.
A common area is any space in a multifamily or commercial property that is shared by tenants and not part of an individual unit—hallways, lobbies, laundry rooms, parking lots, landscaping, and roofs.
At a Glance
- What it is: Shared spaces—hallways, lobbies, laundry, parking, landscaping, roofs—used by all tenants.
- Why it matters: Landlord pays to maintain; typically 5–15% of gross rent; affects value and tenant satisfaction.
- Commercial twist: CAM charges pass common area costs to tenants in many commercial leases.
- Legal: ADA compliance, lighting, and safety are required.
How It Works
What counts as common area. In a multifamily building: hallways, stairwells, lobbies, laundry rooms, mailrooms, fitness centers, pools, parking lots, driveways, landscaping, and the roof. In a strip mall or office building: shared corridors, lobbies, restrooms, parking, and landscaping. Anything tenants use collectively but don't lease exclusively is common area. The roof is often treated as common—it protects all units—even though tenants don't "use" it directly.
Landlord responsibility. In residential multifamily, the landlord maintains common areas. That means: cleaning hallways and lobbies, repairing lighting, maintaining landscaping, plowing snow, fixing roof leaks, and keeping laundry equipment running. You can't charge tenants for routine common area maintenance in most residential leases—it's baked into the rent. Budget it as part of operating expenses.
Budgeting for common areas. Plan for 5–15% of gross rent to cover common area costs. A 6-unit building with $9,000/month gross rent might spend $450–$1,350/month on common area maintenance—cleaning, landscaping, lighting, repairs, snow removal. Larger properties with pools, fitness centers, or elaborate landscaping run higher. Under-budgeting leads to deferred maintenance and tenant complaints.
CAM in commercial. In commercial real estate, tenants often pay common area maintenance (CAM) charges. The lease defines what's included—property taxes, insurance, landscaping, parking lot repair, lobby upkeep. Tenants pay their pro-rata share based on their leased square footage. CAM can be a significant line item—know what's in the lease before you buy.
ADA, lighting, and safety. Common areas must meet ADA requirements—ramps, door widths, handrails where applicable. Lighting must be adequate for safety. Stairwells, parking lots, and walkways need to be well-lit and free of hazards. Failure to maintain can create liability. Document inspections and repairs.
Real-World Example
Maria: A 6-unit apartment building in Denver.
Maria owns a 6-unit building in Denver—three floors, one hallway per floor, shared laundry, parking lot, and landscaping. Gross rent: $8,400/month. She budgets common area costs at 8% of gross: $672/month. That covers: weekly hallway cleaning ($180/month), landscaping ($150/month), parking lot maintenance and snow removal ($120/month), laundry machine repairs and supplies ($80/month), lobby and stairwell lighting ($50/month), and a reserve for roof and exterior repairs ($92/month). She tracks these in her operating expenses spreadsheet. When the roof needs a $4,200 repair, she pulls from the reserve. Tenants notice: the building looks cared-for, and she gets fewer complaints than a comparable property down the street with peeling paint and overgrown shrubs. The common area budget is part of why her occupancy stays above 95%.
Pros & Cons
- Well-maintained common areas support higher rents and lower turnover.
- Budgeting 5–15% of gross gives you a realistic operating expenses picture.
- Common area quality affects property value at sale—buyers notice.
- CAM charges in commercial can pass costs to tenants and stabilize your net.
- Common area costs are ongoing—you can't defer forever without tenant impact.
- Larger amenities (pools, fitness) increase cost and liability.
- ADA and safety requirements add compliance burden.
- Under-budgeting leads to deferred maintenance and bigger bills later.
Watch Out
- Under-budgeting risk: Common area costs add up. Hallway cleaning, landscaping, snow removal, lighting, laundry—it's easy to lowball. Use 5–15% of gross as a starting point and adjust for your property.
- CAM audit risk: In commercial, CAM charges can be complex. Tenants may audit and dispute. Understand the lease language and keep good records.
- Liability risk: Poor lighting, icy walkways, or ADA violations in common areas create liability. Inspect regularly. Document repairs.
- Deferred maintenance risk: Skipping common area upkeep saves short-term but hurts occupancy and property value. Tenants judge the whole building, not just their unit.
Ask an Investor
The Takeaway
Common areas are the shared spaces that tie a property together—hallways, lobbies, parking, landscaping, roofs. You're responsible for maintaining them. Budget 5–15% of gross rent. In commercial, CAM charges pass costs to tenants—know what's in the lease. Keep common areas clean, safe, and compliant. They affect tenant satisfaction, retention, and property value. Skimp here and you'll feel it in turnover and sale price.