Projects

Custom Three-Storey Double Brick Residence in Northbridge

Narooma Road, Northbridge demanded every capability ABCD Builders has. This project involved the demolition of an existing dwelling and the construction of a high-end three-storey double brick residence, designed to maximise the sloping site conditions. Significant excavation and rock removal were required to achieve the building footprint and accommodate the lower levels of the home and pool area.

Due to the elevated neighbouring property, careful stormwater management solutions were implemented to address runoff from the higher side of the site. These measures ensured effective drainage and compliance with site and council requirements throughout the construction process.

The new residence features reinforced concrete slabs and engineered structural steel for durability. Key features include a cast in-situ concrete staircase, double-glazed windows, Blackbutt timber flooring, and custom joinery. External works comprised an underground concrete saltwater pool and two 5,000L poly OSD tanks for stormwater management.

Key Works

This project included:

Demolition of existing dwelling
Major rock excavation and site preparation
Three-storey double brick residential construction
Reinforced concrete slabs with engineered structural steel
Double-glazed windows throughout
Cast in-situ concrete staircase
Custom internal joinery
Underground concrete saltwater swimming pool
Installation of 2 × 5,000L onsite detention tanks

Built to Last: Structure and Engineering

Three storeys of double brick on a sloping, rock-heavy site requires a structural solution that leaves nothing to chance. Reinforced concrete slabs to every level, combined with engineered structural steel, provide the strength and rigidity the site demands. A cast in-situ concrete staircase connects the levels and serves as one of the home’s defining architectural moments. Double-glazed windows throughout add energy efficiency and acoustic performance: decisions that determine how a home performs over decades, not just on opening day.

Rock Excavation and Stormwater Management

Significant rock excavation was required to achieve the building footprint and accommodate the lower levels and pool area. With an elevated neighbouring property contributing runoff to the site, a carefully engineered drainage system was designed to manage inflow from above. Two 5,000-litre poly onsite detention tanks were installed to meet council requirements. ABCD Builders managed excavation, drainage, and OSD installation as part of the full scope.

Finishes: Quality That Earns Its Place

Blackbutt timber flooring runs throughout: warm, hardwearing, and suited to a residence of this calibre. Custom joinery was designed to complement the modern architectural style rather than adapt off-the-shelf solutions to it. The underground concrete saltwater pool completes the external living area.

Custom Home Construction in Northbridge and Sydney

Northbridge sits where sloping sites, sandstone, and strict council requirements are the norm. Building a custom three-storey residence here demands structural depth and genuine engineering capability. ABCD Builders works across Northbridge, Hunters Hill, and the Northern Beaches on complex custom builds, renovations, and demolish-and-rebuild projects.

A Couple Sydney Suburbs We Serve

Frequently Asked Questions

Why build in double brick rather than a lightweight timber frame?

Double brick offers superior thermal mass, acoustic performance, and structural durability, particularly on a sloping site with multiple storeys. It costs more upfront but performs better over the lifetime of the home.

What is an onsite detention tank and do I need one?

An OSD tank temporarily holds stormwater runoff and releases it at a controlled rate, reducing peak discharge and protecting downstream drainage. They are a standard council requirement on most new builds in NSW and need to be engineered to suit your specific site conditions.

Is an underground concrete pool better than an above-ground or fibreglass option?

For a high-end custom home, a concrete pool offers complete flexibility in shape, depth, and finish, and integrates far more cleanly into the architecture. It is more involved to build, but the result is a permanent feature that adds genuine long-term value.

Why Choose ABCD Builders

Rock excavation, double brick construction, engineered structural steel, underground pools, and complex stormwater management: this is the work ABCD Builders does best. Fully licensed (Lic No: 150976C) and HIA-accredited (HIA No: 860896).

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Planning a custom build or demolish-and-rebuild in Northbridge or across Sydney? Bring us your site and brief — we will give you a straight answer on what is possible and what it will cost.