Explore our Services.

Third-Party Property Management

Professional management with a personal touch.

At GSJ Property Management, we help property owners enjoy the rewards of ownership without the stress. Our experienced team handles the day-to-day operations, protects your investment, and works to maximize long-term value.

With over a decade of experience and a strong local presence, we provide hands-on third-party property management tailored to your property and your goals.

Why GSJ

Headquartered in Bryn Mawr, PA, GSJ is powered by a team of dedicated professionals and a network of trusted, vetted vendors. This structure allows us to scale efficiently while delivering responsive, personalized service.

We combine people, process, and technology to deliver consistent results.

Full-Service Management

We streamline the entire management process for owners and residents alike:

  • Marketing, leasing, and tenant screening

  • Online applications, lease signing, and rent payments

  • On-demand financial reporting and clear owner disbursements

  • Online maintenance requests and 24/7 emergency service

  • Full-time, in-house maintenance staff

  • Routine inspections and compliance support

Our property managers stay engaged, proactive, and easy to reach.

Capital Improvements & Value Growth

Our capital management team oversees renovations that increase rental income and property value, including kitchen and bathroom upgrades, laundry additions, and common-area improvements—all designed to improve resident satisfaction and long-term performance.

A Partner You Can Trust

We work with individual owners, investors, and out-of-state clients managing small to mid-sized multifamily and mixed-use properties. With a proven track record spanning more than ten years, GSJ is committed to delivering quality apartments and outstanding service for both residents and ownership partners.

Let’s Get Started

Looking for a reliable, hands-on management partner?
GSJ Property Management is ready to help.

Let’s Work Together

If you're interested in working with us, complete the form with a few details about your properties. We'll review your message and get back to you within 48 hours.

  • "Reliable, responsive and genuinely passionate about what they do."

    Current Client

  • "A professional team that delivers on their promises."

    Current Client

  • "Their attention to detail and commitment to quality truly stood out. We’ve already recommended them to others."

    Current Client