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Can I build a granny flat on a sloping block?

Written by Clayton Bielby

Updated at April 5th, 2025

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Yes — Expandify homes are suitable for moderately sloped sites thanks to our BMSA footing kit and adjustable steel stumps.

Key limits:

Slopes up to 250mm per 5 metres are permitted without cut and fill

Finished floor height can be elevated up to 900mm on H1-class soil

Additional engineering is required for P, M, or H2-class soil types or steeper grades

All slope suitability is confirmed during the Site Assessment. Sites with significant fall may require excavation, retaining, or crane access modifications.

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