How much Do Site Works Cost for a New Home in Perth?

The cost of siteworks can vary depending on where you live in Perth. 

This article is intended to provide a general overview of the essential components of site-work, regardless of where you are building. 

Building a Perth Custom Home can add additional costs depending on many factors and will be dependent on the specific block. 

These costs may not apply to every project. Award-winning family builder Zircon Living is an expert in delivering exceptional builds that exceed client expectations, use our expert guideline below as a starting guide. 

Ready to get your next project underway? Why not check out one of our Perth display homes today.  


Summary of the Costs 

The main costs of building a Perth custom home are divided into four parts 

  • The cost of your land 
  • The price of your house 
  • The price of your finishing’s 
  • Site-related expenses (often referred to simply as site-works). 


What is Site-Works?

New home buyers are often frustrated when builders don’t give you all the details upfront. Perth home builders will give you an estimate for site work and then charge you additional fees at the contract presentation stage.  

This is not only a source for great stress but could also cause financial problems that exceed your ability to pay. At worst, it could force you to cancel your entire project because you are unable to get your financing.  

The actual site preparation (or earthworks) is only one of many items you should consider before building your new home. These are the core components. These cost estimates can be varied so ask your home builder for your block requirements. 


What do I need from a builder to complete my siteworks?  

First, the lot must be titled by the developer. Before determining final costs, the builder must confirm the following items.  

  • Contour Feature survey 
  • Engineers report (includes soil assessment and wind rating assessments). 
  • Bush Fire Attack (BAL) report 
  • Noise Attenuation report 
  • Energy Efficiency Report  
  • Floor plans for the finished floor of the home 
  • Confirmed compliance to all Shire-related requirements 


Site preparation 

For concrete slabs to be laid, your land block will need to have been prepared. You will save money by having a flat block. 

Site preparation is the removal of any structures, vegetation, trees or stumps, bores, rocks, and other objects that might impact the foundations of your new house. It involves the leveling off the ground, the formation of the sand pad, engineers site inspection, and the supply a compaction certificate. 


Approvals – Planning fees 

Many councils require that plans be submitted for approval before applying for a building permit. This approval is known as a DA (Development Authorization) and is also sometimes referred to by the term planning approval. 


Service connections 

 All services including electricity, natural gas, and sewerage will be available in most new development estates. There may be different situations in older areas. 

All these services must be installed in your new home. Perth, home builders may offer allowances that are built into the home’s price, but these can vary between builders. 


Survey Re-Peg

A survey and re-peg are part of the quality standards of a professional builder. This will ensure that your home’s location is accurate before construction can start. 

It is also important to confirm that any retaining walls are in the right position relative to your boundaries. 


Construction of Driveway and Crossovers

A brick-paved driveway that extends to the front boundary is normally included in the home’s price. 

There is an additional land area between your property’s front and the street, known as the cross-section or the council verge. This section requires concrete or paving. The length of the crossover, the location of a footpath on your street side and any other requirements of your Council will affect the amount of concrete or paving required. 


Council Bonds and Fees

Kerb/Verge/Footpath- Large amounts of heavy machinery and vehicles will be required to access your block during construction.  

The footpath may be installed on the street side, which can lead to cracking or breaking of the path. This will need to corrected. 

A bond or fee is required to cover these costs. If it is not necessary, the fee will be refunded in your final building payment. 

It is also important to consider the cost of repairing existing paths. 

Street Tree Protection If your block has trees in front of it, the council may issue a bond. The tree must be fenced to protect it during construction. 


Installation of Soakwells


As part of their Building License approval, the majority of Council Building Departments in the Perth metro area require soakwells. 

These will typically include 2 to 3 large wells located in an area that is suitable for removing excess rainwater. This depends on your access level. 

This price includes the cost of taking out sand from your block, if necessary, after the soakwell holes have been dug. 


Treated Roof Timbers

European House Borer, a flying insect that can get into your roof cavity and drill holes in the timber frame supporting your roof, is called. 

To combat the spread of this pest, the Western Australian State Government established Restricted Movement Zones. However, your home may be in one of these zones. Your local Council may require that your roof timbers are treated by your Council. 

Coastal Zone Conditions

To prevent salt in the air, you might need to add requirements to your property if it is within 1km of the ocean or near a moving body saltwater (e.g. an inlet). This includes galvanised roofing hardware, stainless steel components, epoxy / galvanised and galvanised roof lintels, and mortar upgrades. 

The cost of installing this roof will depend on whether it is a Colorbond or concrete roof. This is the most affordable option.  

Wind Zone Upgrades

Additional elements may be required for high-wind areas. For example, roof ties and roof straps made of stainless steel. Also, additional fixings will be needed for the actual roof covering. Upgrades may be required for window frames and glazing. 

Bushfire Zones

A BAL (Bushfire At Level) report is required if your land contains any bushlands or parks. This could lead to your home being upgraded to withstand bushfires. 

Safety scaffolding for roof workers

Many of the new land developments have extensive limestone retaining walls to create a block environment. 

 Sometimes, this can lead to distances from rooftops to ground on adjacent blocks that are not in compliance with Work safe Requirements. 

 If this happens, an additional cost for roof scaffolding installation along the roofline will be required. 


Hard Digging Allowances

 A soil report is one of the first things you should do when you move into your Perth custom home. This will allow you to identify what lies beneath the topsoil level that developers use in their land estates. 

 This could be either limestone, rock, or normal sand or clay, depending on where you’re building. 

 If the report shows that digging to the required depths is difficult for house foundations or service tunnels to be installed, then a hard-digging allowance might be necessary to cover the cost of additional machinery. 

 It is typically a provisional amount and will not be used during construction. 

Additional Site Cleaning Due to Restricted Acces

Block sizes are shrinking, and local Councils place more restrictions on the items that can be loaded onto your block’s verge. To make space for next deliveries of goods, it may sometimes be necessary to clean up your property during construction. 

 A standard number of site cleanings are included in the home’s base price. Additional site cleans will not be included if your block is restricted storage or access. 



Ask your builder for a complete breakdown of all associated costs for the construction of your new home.  

Frequently asked questions 

What re siteworks costs in construction?

The expenses needed in getting your land ready for construction is called site works costs. For a flat site expect to pay a minimum of $12, 000 but this figure will increase is your land is sloped or has other issues.  


What do site works include?

Depending on the nature of your block and its terrain, site works may involve levelling sloping ground, removing rocks and trees, building retaining walls, soil tests etc.  


What is site works cost allowances?

These are estimates for site work costs, as Perth home builders are not able to confirm until they complete a thorough assessment of the site. However, there are some builders who will offer fixed costs to give you more financial security.  


Give us a call!

Our multi-award-winning team at Zircon Living are an expert in home builds. Give us a call today to discuss options for your future development and have peace of mind knowing that you are in professional, caring hands. Or why not check out one of our Perth display homes