About Us
 Building with integrity, experience and pride
SM & KA Duff Builders Pty Ltd
SM & KA Duff Builders Pty Ltd is a family-owned and operated construction company with deep roots in Roma and the Maranoa region. Our company has operated under QBCC Licence 1103503 since 2006, following earlier trading under Stephen Duff’s personal building licence.
With decades of local experience, we have built a strong reputation for reliable project delivery, quality workmanship and practical problem-solving across commercial, government, residential, aged care, school, agricultural and community projects.
Relationships
Built on Experience. Grounded in Community.
For more than three decades, Duff Builders has contributed to the built landscape of Roma and the surrounding district, from major commercial buildings and government projects to aged care facilities, community infrastructure, custom homes, sheds and renovations.
Experience
Commercial construction
Government and council projects
Aged care and community facilities
School buildings and upgrades
Residential new builds and renovations
Agricultural sheds and machinery storage
Commercial refurbishments and extensions
Project coordination with architects, engineers, planners and trades
Accountability
SM & KA Duff Builders maintain strong systems and processes across safety, environmental management and project delivery.
QBCC Licence: 1103503
PQC Qualification: Level 2
Public Liability Insurance: $20 million
Professional Indemnity: $20 million
Insurance of Works: $2 million
WorkCover: Current policy held
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