Transform your home into a space that finally fits your lifestyle. MB9 Australia Pty Ltd specialises in professional house alterations and additions across Sydney, helping homeowners reconfigure outdated layouts, add more living space, improve functionality and increase property value—without the stress and uncertainty that often come with major building works.

Every suburb in Sydney has its own building style, council requirements and structural challenges, and MB9 understands how to design and build alterations and additions that suit each area. In the Inner West—Newtown, Marrickville, Annandale, Stanmore and Ashfield—many homes are older terraces or federation houses with tight floor plans. We excel at opening up closed layouts, improving natural light, adding rear extensions, reconfiguring internal walls and creating modern open-plan living while respecting the original architecture.

On the North Shore, including Turramurra, Wahroonga, Killara, Lindfield and St Ives, families often extend homes to create larger kitchens, extra bedrooms, second-storey additions or multi-functional living spaces. These homes typically benefit from structural upgrades, improved flow and premium finishes, and MB9 delivers high-quality additions designed for long-term family living.

In the Eastern Suburbs—Bondi, Randwick, Coogee, Maroubra and Rose Bay—coastal homes often require careful planning due to limited land size, older structures and exposure to the elements. Whether it’s extending upwards, building a rear pavilion, converting unused rooms or opening up living areas to outdoor spaces, we create renovations that feel airy, durable and perfectly suited to beachside living.

Across the Hills District—Castle Hill, Baulkham Hills, Kellyville and Glenhaven—homes tend to be larger but often need smarter layouts or expanded living zones. MB9 frequently builds ground-floor extensions, family-room additions, alfresco integrations and redesigned internal layouts that support busy household routines.

In Western Sydney—Parramatta, Westmead, Auburn, Blacktown, Lidcombe and surrounding suburbs—homeowners often want practical, cost-effective alterations to improve space and functionality. We deliver well-planned extensions, wall removals, structural changes, garage conversions and layout upgrades that maximise every square metre.

Whether you’re turning an old dining room into a larger kitchen, adding a new master suite, building a second-storey addition, opening up your living area, or reconfiguring the entire layout of your home, MB9 provides end-to-end project management, including design coordination, structural planning, approvals, licensed trades and quality construction.

Our alteration & addition services include:

• Ground-floor extensions and rear additions

• Second-storey additions

• Internal wall removal and structural reconfigurations

• Open-plan conversions

• Additional bedrooms, living spaces and bathrooms

• Heritage-sensitive alterations for older homes

• Layout redesigns for modern living

• Terrace house extensions and structural upgrades

• Garage conversions and functional space additions

With strong experience in Sydney’s diverse housing stock and a NSW Kitchen, Bathroom & Laundry (KBL) renovation licence, MB9 ensures all structural, plumbing and electrical work is completed by qualified, compliant trades. Our process is built on clear communication, reliable timelines and meticulous attention to detail.

From heritage terraces in Balmain to brick homes in Ryde, contemporary houses in Turramurra, family homes in Castle Hill and classic cottages across the Inner West, MB9 Australia Pty Ltd delivers house alterations and additions that elevate your lifestyle and enhance your home for the future.

Refer to links below to find out more details about our specific services.