How Much Does a Draftsman and Building Designer Cost?

If you're planning a new home, renovation, extension, or granny flat in Melbourne, one of the first questions you'll want answered is: how much does a draftsman or building designer actually cost? The honest answer is that it depends. Fees vary based on the type of project, how complex the design is, how much documentation is needed, and what approvals have to be secured before construction can begin.

Every building project is different, which is why drafting fees and building designer costs are tailored to the specific needs of each job. At Nexplan, we provide a personalised quote once we understand your goals, your site conditions, and the level of service your project requires. Whether you're planning a new home, a renovation, an extension, a granny flat, a carport, or a multi-residential development, the final cost comes down to the scope of work and the approvals involved.

What affects drafting and building design costs?

Several factors shape the cost of drafting services and building design. Here's a closer look at the main ones.

Project type and complexity

A simple project like a verandah, carport, or deck generally requires far less drafting work than a full home design, extension, renovation, or multi-unit development. The more complex the project, the more planning, design consideration, and detailed drawings it demands.

Level of documentation required

Drafting costs also depend on how much design and documentation your project needs. This can include concept designs and preliminary plans, planning permit drawings and documentation, building permit documentation, detailed construction drawings for builders and trades, and coordination with engineers and other consultants. Exactly what's required will depend on your project type, your site conditions, council requirements, and the approvals needed before construction can start.

Site conditions and planning requirements

Every property comes with its own quirks, and some of these can add real complexity to the design process. Common examples include site constraints like slope or access issues, land overlays, heritage considerations, easements, planning permits and council approvals, engineering requirements, energy efficiency reports, and bushfire compliance requirements.

Not every project needs planning approval before a building permit can be issued — it depends on factors like your property's zoning, any overlays, site conditions, and the type of work you're proposing. But when planning approval is required, it can add time and call for additional professional services, which in turn affects the overall cost.

Typical drafting and building design costs

Because every project is different, drafting and building design fees can vary significantly depending on the scope of work. As a general guide:

Simple drafting projects typically start from a few thousand dollars when minimal documentation and approvals are needed. Where your project lands within that depends on the extent of the design work, the number of drawings required, how many consultants need to be involved, and the specific approval pathway for your property.

Renovations and home extensions usually call for more detailed drawings, site assessments, consultant coordination, and approval documentation, which pushes the cost higher than a simple structure.

New home designs, dual occupancy developments, and multi-residential projects involve the highest level of planning, design, and documentation — and the cost reflects that.

It's worth remembering that the cheapest quote isn't always the most cost-effective choice in the long run. Well-prepared construction drawings and thorough documentation help avoid delays, approval issues, and costly changes once building is underway.

Why can a simple project take longer than expected?

It's a common misconception that the time it takes to draft a project matches the overall project timeline. Drafting a carport, for instance, might only require a short burst of design work — but the total project timeline can stretch out due to planning overlays, easements, engineering requirements, or council approval processes.

Other factors that can extend a seemingly simple project include site evaluations, planning permits, council approval timelines, easements and property restrictions, building permit requirements, engineering assessments, and additional documentation requested by authorities. What looks like a small job on paper can end up taking several weeks or even months once you factor in approvals and site conditions.

How long does drafting and building design take?

Timelines vary depending on how complex your project is and what approvals it needs. A straightforward project might be wrapped up within several weeks, while larger undertakings — extensions, new homes, dual occupancies, and multi-residential developments — typically take longer due to design revisions, consultant collaboration, and council procedures.

At Nexplan, we guide clients through every stage of this process, from the initial concept right through to detailed documentation and final approvals.

Why choose Nexplan for drafting and building design?

Nexplan provides professional building design and drafting services for residential projects across Melbourne and Melbourne's south-east. With over 20 years of industry experience, registered building designers on our team, and a deep understanding of the approval process, we help homeowners and builders create practical, compliant, and construction-ready plans.

Our services include building design, drafting services, new home design, house extensions and renovations, granny flat design, dual occupancy and multi-residential developments, planning permit drawings and documentation, building permit documentation, construction drawings, and permit management and coordination.

Get a personalised quote for your project

Because every project comes with its own requirements, the best way to understand what drafting and building design will cost for your project is to talk it through with our team. Contact us for an initial consultation, and we'll help you understand the likely requirements, process, and costs involved.