Heritage Property Renovation Cost Guide [2026]

Renovating a heritage property is a grand undertaking – as a heritage homeowner, you have the privilege and responsibility of preserving the character and historical elements of the property, while writing the chapter that belongs to you.

Naturally, this responsibility comes with greater considerations in terms of finances, permissions, and architectural design. 

Renovating a heritage property costs more than a standard renovation, and for good reason. This guide walks owners through where the money goes, what to plan for, and what to expect at each stage.

Average Cost of A Heritage Property Renovation in Australia

A heritage property renovation in Sydney can cost between $6,000 and $8,000 per square metre for a medium-quality renovation and over $9,000 per square metre for a high-quality renovation. Renovating a three-bedroom Federation-style heritage home (200m²) would cost between $1,000,000 to $2,000,000, depending on the quality of the renovation. This includes the cost of materials, tradeswork, and planning. 

As you may be aware, more considerations and regulations apply to renovation works on a heritage property, based on the level of heritage attribution, from a heritage conservation area (HCA) to a heritage item listed at a local, state or national level. These include the need for an Architect specialising in heritage projects, a heritage consultant and town planners with heritage expertise.

Many homeowners make the mistake of assuming that the cost of renovation for a heritage property will be similar to that of any other build. In reality, heritage renovation work will usually involve higher costs to comply with council or state regulations for the preservation of the property’s heritage value. 

Heritage Renovation Costs 

Heritage Assessment

A heritage assessment must be carried out before any renovation work can begin. The assessment measures the heritage value or significance of the property, both as a whole and for individual constituent parts, such as notable architectural features. 

Property owners are required to hire an external heritage consultant to conduct the assessment and obtain a Heritage Impact Statement (HIS), which is required for the development application to the council. 

A heritage assessment for a heritage-listed property in NSW can cost between $2,500 to $6,000, depending on the property’s level of heritage listing. Heritage assessments for residential properties in a Heritage Conservation Area (HCA) usually cost up to $3,000. 

Design Planning

A heritage architect is required to develop the design for a heritage renovation. Heritage architects usually charge fees ranging from 10-15% of the construction cost. 

An architect with expertise in heritage structures is trained with the skills and experience to understand the building constraints set out in the Heritage Impact Statement (HIS) and plan for new extensions or upgrades without impacting the property’s heritage value. 

The work of a heritage architect also extends to ensuring a cohesive design and aesthetic for the renovation that blends well with the property’s existing features. 

Development Approval Application

The application cost for development approval in NSW is calculated based on a sliding scale:

Heritage application fees 

Estimated cost of work	Fee
Work on a private owner-occupied house up to $100,000	$150
Other works that costs up to $100,000	$300
$100,000 and $500,000	$400 plus $25 for each additional $100,000 or part $100,000 over $100,000
$500,000 and $1 million	$500 plus $100 for each $100,000 or part $100,000 over $500,000
$1 and $2 million	$1,000 plus $50 for each $100,000 or part $100,000 over $1 million
$2 and $5 million	$1,500 plus $33.33 for each $100,000 or part $100,000 over $2 million
$5 and $10 million	$2,500 plus $10 for each $100,000 or part $100,000 over $5 million
Over $10 million	$3,000 plus $10 for each additional $100,000 or part $100,000 over $10 million

Costs referenced from NSW Environment and Heritage. 

Aside from the application fee for development approval, each council in New South Wales also charges its own set of fees for assessing heritage work applications. For example, the Randwick City Council charges a $200 fee covering the assessment of the heritage application and a written response. Other councils, like the Inner West Council, only have fees shown at the time of lodgement. Check with your council beforehand when budgeting for your heritage renovation. 

Sustainability Features 

Non-renovated Heritage homes often have beautiful facades from the main street, but the rear of the property and the interiors are dark and draughty as a result of poor design and workmanship.

A large focus of a heritage renovation project involves making changes to the property for improved thermoregulation, air quality, and energy efficiency. 

Heritage architects who specialise in sustainability, such as Crush Architecture, integrate Passivhaus principles into renovation design to create a more comfortable living environment in a heritage home. Heritage homes with Passivhaus design have:

• Constant temperatures with minimal reliance on heaters or air conditioning
• Fresh air that has been filtered to eliminate dust, allergens, and outdoor pollutants
• No drafts or cold spots 
• Greater energy efficiency and lower utility bills

When you work with Crush Architecture for your heritage renovation project, Passivhaus design will already be included in the cost and consultation to deliver a heritage home that you’ll love to live in. 

Asbestos Removal 

Heritage properties, especially those built between the 1920s and the mid-1980s, may contain asbestos. Asbestos poses high health risks for occupants and must be removed when found, according to the Department of Health. 

The cost of services for asbestos inspection and removal in Sydney can start from $300 and potentially go over $1,500 for properties requiring extensive removal. 

Utility Systems Upgrade

Many heritage-listed properties have outdated electrical and plumbing systems that will need to be updated for compatibility with the renovation design. These utility system upgrades will incur more costs, depending on the extent of the replacement work.