Onside Property Group Expands Across Inner West Sydney

Founder-Led Firm Grows Into a Dozen Inner West Suburbs Without Dropping Direct Client Access

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

Onside Property Group, a boutique property management agency headquartered in Pyrmont, has announced a formal expansion throughout Sydney’s inner west, representing a notable growth milestone for the founder-led firm. Anthony Doumanis, who established the agency at 3/04 56 Bowman St, Pyrmont NSW 2009, built the business around a single principle: that landlords deserve direct, consistent access to the person responsible for managing their investment – not a succession of unfamiliar staff members.

A Founder Who Stays on the Tools

Doumanis launched Onside Property Group after identifying a gap in how larger firms approached the day-to-day realities of property management Sydney landlords were navigating. While bigger agencies typically distribute clients across multiple departments and contacts, Doumanis structured his firm so that he remains directly involved in every client relationship. That model, uncommon by industry standards, has become the defining characteristic of the business.

Landlords who contact the agency reach Doumanis directly on +61431833333 – a detail that reflects the agency’s operational philosophy rather than simply its size. As the business has expanded into surrounding inner west suburbs, that direct-access model has been deliberately maintained rather than phased out.

“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 extends well beyond scale. At Onside Property Group, the practical distinction is evident in response times, tenant vetting decisions, maintenance coordination, and the speed at which landlords receive updates when issues arise.

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

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

Expansion Built on Referrals, Not Advertising

Onside Property Group’s growth into new inner west suburbs has been driven primarily by referrals from existing clients – a pattern Doumanis attributes to the agency’s operational consistency rather than any formal marketing effort. Landlords who have experienced high staff turnover or fragmented communication at larger firms have sought out the agency specifically for its founder-led structure.

The expansion has brought the agency into contact with a broader range of property types and investor profiles, including first-time landlords alongside investors with larger portfolios who have grown dissatisfied with service levels at corporate firms.

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