Onside Property Group Keeps Low Client Ratios as Portfolio Grows

Against Industry Norms, This Sydney Property Firm Is Keeping Client-to-Manager Ratios Low

Pyrmont, Australia – May 8, 2026 / Onside Property Group /

Onside Property Group, a boutique property management agency headquartered in Pyrmont, has announced a formal expansion across Sydney’s inner west, representing a notable growth step for the founder-led firm. Anthony Doumanis, who built the agency from its base at 3/04 56 Bowman St, Pyrmont NSW 2009, established the business on a straightforward principle: that landlords deserve consistent, direct contact with the person managing their investment property – not a succession of rotating staff members.

A Founder Who Stays on the Tools

Doumanis launched Onside Property Group after identifying a gap in how larger firms handled the everyday demands of property management Sydney landlords face. While bigger agencies commonly distribute client contact across multiple departments and personnel, Doumanis structured his firm so that he remains personally involved in each client relationship. That approach, which diverges from standard industry practice, has become the defining characteristic of the agency.

Landlords who contact the agency reach Doumanis directly on +61431833333 – a detail that reflects the agency’s operational philosophy rather than simply its current size. As the business has extended into surrounding inner west suburbs, that direct-access structure has been deliberately maintained rather than gradually replaced by intermediary layers.

“When I started this agency, I made a commitment that every client would have direct access to me – not a property manager who changes every six months,” said Anthony Doumanis, Founder of Onside Property Group. “We now manage properties across more than a dozen inner west suburbs, and I am still personally involved in every single one of those relationships from day one.”

What the Boutique Model Actually Delivers

The difference between a boutique property management agency and a large corporate firm is not purely a question of scale. At Onside Property Group, the practical contrast surfaces in response times, tenant vetting, maintenance coordination, and the speed with which landlords receive updates when issues arise.

Larger agencies operating across property management Sydney markets typically assign several hundred properties to each property manager. Industry data suggests that ratio makes individualized attention structurally difficult to sustain. Doumanis designed Onside Property Group around a deliberately controlled client-to-manager ratio, with himself as the primary point of contact for landlords throughout the inner west corridor.

The agency manages residential investment properties across Pyrmont and the broader inner west, covering lease negotiations, routine inspections, tenant communications, and financial reporting. Each of those functions is handled through a single accountable contact rather than being distributed across separate departments.

Expansion Built on Referrals, Not Advertising

Onside Property Group’s growth into additional inner west suburbs has been driven largely by referrals from existing clients – a pattern Doumanis attributes to operational consistency rather than any structured marketing campaign. Landlords who have experienced frequent staff turnover or inconsistent service at larger firms have sought out the agency specifically because of its founder-led model.

The expansion has brought Onside Property Group into contact with a wider range of property types and investor profiles, including those managing a first investment property alongside landlords with larger portfolios who have grown dissatisfied with service standards at corporate firms.

The agency’s Pyrmont office functions as the operational hub for all properties under management, with Doumanis coordinating directly with tenants, landlords, tradespeople, and compliance requirements across the full portfolio. That centralized, founder-involved structure is what the agency points to when distinguishing itself from others in the Sydney property management market.

About Onside Property Group

Onside Property Group is a boutique property management agency founded by Anthony Doumanis and located at 3/04 56 Bowman St, Pyrmont NSW 2009. The agency provides residential property management services across Sydney’s inner west, with a founder-led model that keeps Anthony Doumanis directly involved in every client relationship. The agency can be reached by phone at +61431833333.

Learn more at Onside Property Group