Warriewood Granny Flat Project – NSW
Warriewood Granny Flat Project
This completed Warriewood granny flat project on Sydney’s Northern Beaches needed a design that responded to an unusual block shape, a significant tree and a sewer main.
We consulted with the owner, builder and private certifier to resolve the site constraints and position the dwelling. The project photographs and partial site plan below show the resulting property setting.
Unusual Block Geometry
The property had three boundaries: its two side boundaries converged at a single rear point, rather than meeting a conventional rear fence.
The team discussed how to interpret that geometry with the private certifier before determining the dwelling’s position and setbacks. This was a decision for that particular project, not a universal rule for triangular blocks. Current site requirements and the proposed approval pathway need assessment for each property.
Planning Around A Significant Tree
A tree on the adjoining property stood near the preferred building position. The design needed to respond to its root zone to protect both the tree and the proposed foundations.
Instead of treating tree removal as the default, we discussed a layout that worked around the tree. Tree protection requirements and any necessary specialist input should be established early in your own project.
Watch out for the Sewer Mains!
The partial site plan showed the sewer main along the left-side boundary. We checked its zone of influence when considering the dwelling’s location and potential sewer-protection requirements.
The case illustrates why sewer information should be checked before fixing a building position. Protection works, approvals and costs depend on the actual services and proposed construction; a small layout change does not guarantee that additional requirements can be avoided.
Enhancing Your Project – Landscaping
The final setting combined the granny flat with details such as internal fencing, planter boxes, garden beds and outdoor surfaces. These features helped define the outdoor space and retain the property’s leafy character.
For your project, discuss the dwelling and landscape scope together. Compare our designs and floor plans, explore the build price calculator and separate approval price calculator, or discuss your site with our team. View more completed projects to compare different property constraints.




