Residential building design project Rockbank, Melbourne western suburbs

Registered building designer for Rockbank and surrounds

Extensions, granny flats, dual occupancy, and new homes. RD Building Design manages design and permits across Melton.

RD Building Design is a registered building design practice covering Rockbank and Melbourne's wider western suburbs. We manage residential projects from the first conversation through to approved building permit drawings.

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About RD Building Design

Rhys Davies Building Designer (DP-AD 43008) Adv.Dip. Building Design (Arch.), Registered Building Practitioner (Arch.) RD Building Design

RD Building Design is a registered building design practice specialising in residential projects across Melbourne's western suburbs. Our work covers Melton and the surrounding councils.

Every project is led by an experienced building designer from first conversation to permit approval.

For Rockbank homeowners: straightforward advice, honest timelines, and permit drawings done properly the first time.

Want to understand the difference between working with a building designer and an architect?

House extensions on compact Rockbank blocks

On Rockbank's smaller lots, every extension decision has cascading effects. Adding floor area to one side tightens a setback. Going up triggers overlooking provisions. Covering outdoor space reduces the private open space calculation.

Getting these trade-offs right at design stage, rather than discovering them at permit assessment, is what separates a smooth project from an expensive rework. RD Building Design designs extensions on tight sites regularly and understands where the Melton Planning Scheme gives room to work with.

What we design for Rockbank homeowners

RD Building Design works across the full scope of residential projects.

House extensions. Rear, side, or second storey. Structural coordination and full permit documentation included.

Granny flats and studios. Including our Boxed Buildings SIP panel range. Design and permits managed; your builder assembles.

Dual occupancy. Two dwellings on one block where zoning allows. Feasibility assessment through to permit.

knockdown rebuild. A new home designed around your site, your household, and the planning controls.

New house design. Full design for vacant or subdivided lots, from brief through to building permit.

Local planning knowledge in Rockbank

The Melton Planning Scheme sets the rules, but understanding how Melton applies them takes experience beyond reading the document.

RD Building Design reads the Melton Planning Scheme as part of regular work. We know which overlays affect Rockbank properties, how council interprets neighbourhood character requirements, and where the scheme gives flexibility worth using.

This knowledge shortens permit timelines and reduces requests for further information, which is the most common source of avoidable project delays.

Not sure what your property allows? A property assessment gives you a clear picture of what's buildable on your block before committing to design.

What you can build in Rockbank

Planning controls and development potential under the Melton Planning Scheme

Council

Melton

Planning scheme

Melton Planning Scheme

Predominant zones

GRZ General residential zone

Allows moderate housing growth. Dual occupancy viable on lots of 300sqm+ per resulting title. Medium density development permitted with a planning permit.

UGZ Urban growth zone

Applies to land on Melbourne's urban fringe identified for future residential development. Development is guided by precinct structure plans that set out lot sizes, density targets, and infrastructure requirements.

Planning overlays

No heritage, flood, or design overlays apply broadly to this suburb. Individual properties should still be checked for site-specific overlays.

Typical lot size

Small to medium (typically under 500sqm)

Site coverage is frequently the binding constraint. Extensions and secondary dwellings need careful positioning to stay under the 60% site coverage limit.

Granny flat viability

Permitted up to 60sqm without a planning permit under Victoria's 2023 provisions, but site coverage is likely to be the binding constraint. Many blocks can accommodate a secondary dwelling if existing building footprint allows.

Dual occupancy

Limited viability

Predominantly NRZ zoning or small lot sizes restrict dual occupancy to a small number of properties. Site-specific assessment essential.

Location

32km from Melbourne CBD. Nearest station: Rockbank.

This summary reflects general planning conditions for Rockbank as of 2025. Individual properties may have additional overlays or conditions. A property assessment confirms exactly what applies to your block.

Building design services in Rockbank

Whatever your project RD Building design can help.

New home design

Custom home design from initial brief through to permit-ready documents

Knockdown rebuild designs

A completely new design on your existing block, built around the life you want

Residential extensions and renovations

Additions that connect and blend with your existing home

Townhouses / Multi-Unit design

Multiple dwellings on one site, with all planning and documentation managed

How building design works with RD Building Design

Here is how a typical project runs.

Initial consultation. We discuss your project, assess your Rockbank property's planning situation, and give you a clear picture of what is achievable. No fee.
Brief and feasibility. We assess your goals against the site and planning controls. This happens before design begins.
Concept design. Floor plans, external appearance, and how the project works on the block. You direct revisions.
Planning permit (where required). We prepare, submit, and manage the application through to decision.
Building permit documentation. Full working drawings for permit submission and builder pricing.
Approved drawings. A complete set any registered builder can price from and build to.

RD Building Design serves homeowners across Melbourne's western suburbs and beyond.

Building design questions for Rockbank homeowners

Do I need a planning permit to extend my house in Rockbank?

It depends on the work and your property's planning overlays. Many extensions can proceed directly to building permit under ResCode. Properties in heritage overlays or special planning areas usually require planning approval. RD Building Design assesses this at initial consultation.

How long does a building permit take in Rockbank?

A building permit application is typically assessed in 10-20 business days. Where a planning permit is required first, Melton assessment typically takes 10-60 days. RD Building Design advises on realistic timelines at the start of every project.

Can I build a granny flat on my Rockbank property?

Most residential lots zoned NRZ or GRZ can accommodate a secondary dwelling up to 60sqm without a planning permit under Victoria's 2023 provisions, subject to site coverage, setback, and open space requirements. RD Building Design confirms feasibility as part of an initial assessment.

Is a second storey addition possible on my Rockbank property?

In most cases, yes, subject to the existing structure's capacity and planning requirements for overlooking, overshadowing, and neighbourhood character. RD Building Design assesses structural and planning feasibility as part of the concept stage.

Can I do a knockdown rebuild in Rockbank?

If your property is not heritage-listed, a knockdown rebuild is usually viable. The replacement dwelling must comply with the Melton Planning Scheme for setbacks, site coverage, and neighbourhood character. RD Building Design confirms what the site allows before design begins.

How do I find out what I can build on my property in Rockbank?

RD Building Design offers a property assessment that reviews your block against the Melton Planning Scheme and gives you a written summary of what is buildable: extension capacity, granny flat viability, dual occupancy potential, and any constraints.

Talk to a building designer who knows Rockbank

A free consultation covers your project, your property's planning situation, and an honest assessment of what is achievable. No obligation.

Book a free consultation View our building design services