Owning rental property in Philadelphia can be a rewarding investment, but profitability is never guaranteed.
Sometimes the biggest threats to a landlord’s return aren’t major market changes or unexpected disasters.
They’re small management mistakes repeated over time.
A poorly priced rental, an inadequately screened tenant, deferred maintenance, or weak documentation can turn what should be a profitable investment into a source of constant expenses and stress.
Here are 10 common mistakes landlords make—and how to avoid them.
1. Not Screening Tenants Thoroughly
One of the most important decisions a landlord makes is choosing who will occupy the property.
Rushing this process because a unit is vacant can be costly.
A consistent tenant screening process may evaluate:
- Income
- Employment
- Credit history
- Rental history
- Background information
- References
- Established rental qualification criteria
The goal is not simply to find someone who can move in quickly.
The goal is to find a qualified applicant while following all applicable fair housing and tenant-screening requirements.
How to Avoid It:
Create documented qualification criteria and consistently apply them to applicants.
A few extra days spent conducting appropriate screening may prevent months of problems later.
2. Underpricing the Property
Some landlords keep the same rental rate for years because they have a reliable tenant or simply haven’t researched the market.
While tenant retention has significant value, dramatically underpricing a property can reduce long-term investment performance.
Imagine charging $200 below an appropriate market rate.
That’s potentially:
$2,400 in foregone gross rental income per year.
Across several properties, the difference can become substantial.
How to Avoid It:
Regularly review comparable rentals and evaluate your property’s:
- Location
- Size
- Condition
- Amenities
- Improvements
- Current demand
Rent adjustments should always comply with lease terms and applicable laws.
3. Overpricing the Property
Underpricing isn’t the only problem.
Overpricing can be equally expensive.
Suppose a property could reasonably rent for $1,800 per month.
A landlord lists it for $2,100 hoping to earn more.
If the property sits vacant for an extra month, the landlord may lose $1,800 in potential rent while waiting for someone willing to pay the higher price.
It could take months of collecting an extra $300 to recover that lost income.
How to Avoid It:
Price strategically based on actual market conditions—not simply what you hope the property will rent for.
4. Deferring Maintenance
A small leak rarely becomes cheaper with time.
Deferred maintenance can turn relatively manageable repairs into expensive projects.
Common examples include:
- Minor roof leaks becoming water damage
- Slow plumbing leaks causing mold or structural damage
- HVAC issues becoming system failures
- Damaged caulk leading to moisture intrusion
- Small electrical problems becoming larger safety concerns
How to Avoid It:
Use preventative maintenance and respond promptly to reported issues.
Regular inspections can also help identify problems before they become emergencies.
5. Keeping Poor Documentation
One of the most common landlord mistakes is relying on informal conversations.
A tenant calls.
The landlord agrees to something.
Months later, nobody remembers exactly what was discussed.
Important property management activities should be documented.
This includes:
- Payments
- Maintenance requests
- Lease changes
- Notices
- Inspections
- Tenant communication
- Property condition
- Repairs
How to Avoid It:
Create a centralized system for maintaining property and tenant records.
When important conversations happen by phone, consider documenting the outcome appropriately afterward.
6. Allowing Vacancies to Last Too Long
Every vacant day has a cost.
A $1,800-per-month rental generates approximately $60 in potential gross rental income per day.
A 30-day unnecessary vacancy?
That’s approximately $1,800 in potential lost rent.
Landlords sometimes underestimate how much slow marketing, delayed repairs, poor photography, or inconvenient showing schedules contribute to vacancy.
How to Avoid It:
Prepare for turnover before the existing tenant leaves when possible.
Have a process for:
- Move-out inspections
- Repairs
- Cleaning
- Photography
- Marketing
- Showings
- Applications
The faster these steps happen efficiently, the sooner the property may begin generating income again.
7. Inconsistent Lease Enforcement
A lease only works when expectations are clear and consistently managed.
Problems can arise when landlords repeatedly overlook:
- Late payments
- Unauthorized occupants
- Unauthorized pets
- Property misuse
- Maintenance responsibilities
- Other lease violations
Inconsistent enforcement can create confusion and make future issues more difficult to address.
How to Avoid It:
Use clear lease terms and follow established procedures consistently.
When legal questions arise, seek appropriate professional guidance before taking action.
8. Failing to Understand Local Requirements
Philadelphia rental properties are subject to local requirements that landlords need to understand.
Depending on the property and circumstances, these may involve rental licensing, Certificates of Rental Suitability, lead certification, property standards, and other requirements.
For example, Philadelphia requires landlords to meet applicable lead-safe or lead-free certification requirements in connection with leasing and rental licensing. The City also establishes requirements for obtaining a Certificate of Rental Suitability.
How to Avoid It:
Stay informed.
Regulations change, and relying on something you heard from another landlord five years ago is not a compliance strategy.
Use official City resources and consult qualified professionals when needed.
9. Treating Tenants Like an Inconvenience
Tenant retention matters.
Every unnecessary turnover can create expenses involving:
- Vacancy
- Cleaning
- Repairs
- Marketing
- Showings
- Administrative work
- Leasing
That doesn’t mean landlords should ignore lease violations or unreasonable requests.
It means communication should remain professional and responsive.
How to Avoid It:
Set clear expectations from the beginning.
Respond to legitimate concerns promptly, maintain the property appropriately, and communicate professionally.
A good tenant who renews can be extremely valuable.
10. Trying to Do Everything Yourself
- Self-management can save a management fee.
- But it doesn’t necessarily save money.
- Landlords often underestimate the value of their own time and the cost of mistakes.
- Consider everything involved:
- Tenant screening.
- Marketing.
- Showings.
- Leases.
- Rent collection.
- Maintenance.
- Inspections.
- Tenant communication.
- Compliance.
- Recordkeeping.
- Move-outs.
- Vacancies.
For one easy-to-manage property, that may be reasonable.
As a portfolio grows, however, management can quickly become a full-time responsibility.
How to Avoid It:
Treat your time like any other investment resource.
Ask yourself:
“Am I actually saving money by doing this myself—or am I simply doing unpaid property management work?”
Sometimes professional management can create value by improving efficiency across the entire rental operation.
Better Management Can Mean a Better Investment
Successful rental ownership isn’t simply about buying the right property.
It’s about managing that property effectively after you buy it.
Small improvements in vacancy rates, rental pricing, tenant retention, maintenance, and operational efficiency can have a significant cumulative effect on long-term returns.
At Tower Property Management, we help Philadelphia-area property owners handle the day-to-day responsibilities of rental ownership while protecting their investments and working toward stronger overall property performance.
Looking for a better way to manage your rental property?
Contact Tower Property Management to learn how we can help.