When building a new home, it typically begins with one number: the estimated construction price. However, the block may require significant work before the first wall can be erected.
At the core of any project site preparation involves excavation/demolition, earthworks, drainage, and foundation prep. The price is very different, because each block is one of a kind. This knowledge gives one a fairly good idea (and since builders in Rose Bay often keep the homeowner in the loop regarding costs) to avoid such unpleasant budget shocks.
What Does Site Preparation Include?
Site prep is the work necessary to prepare a site for use. This may consist of a handful of tasks depending on the property.
Common costs can include:
- Clearing vegetation and rubbish
- Demolishing an existing structure
- Excavating soil or rock
- Levelling or reshaping the site
- Removing excess soil
- Installing temporary drainage
- Preparing foundations
Not every project requires all of these services. Consider a relatively clear block with little slope requiring lots and lots of prep compared to a steep or tough site.
What is the Cost of Site Preparation?
There is no comprehensive number. However, while an uncomplicated block may need only minor preparation, a difficult site can make a substantial increase to the building costs.
Earthworks, the ground conditions, access, and if there is a demolition of structures needed typically comprise the majority of cost drivers.
Do not calculate site preparation per building standard as percent of the build price but treat it as project-based cost.
Why Soil Conditions Matter?
When you recover are equally important for the future of your superhighways, and it all comes back to money. Additional engineering or excavating might be required if reactive clay, loose fill, rock, and poor-quality soil is involved.
Soil testing can help before construction. This can also help in determining what sort of footing or foundation system should be used.
By skipping this step, homeowners often leave themselves vulnerable to unforeseeable expenses down the road.
Sloping Blocks Can Cost More
A slope block can be desirable but may also need more complete earthworks. Additional factors to cost may be retaining walls, cut-and-fill work, specialised foundations and drainage.
That does not mean, however, that you should shy away from sloped land. It just means you will need to evaluate the site carefully before you finalise your budget.
Experienced builders in Marrickville will be able to pinpoint these practical construction concerns when considering your proposed project.
Access Can Affect the Price
It requires booking construction machinery to arrive on site. Narrow or restricted access means difficult digging and seeding of earthmoving materials.
Access limitations reduce choices equipment, increase labour, or desirable alternative methods. Some logistics do not come inherent to the ground, which pushes prices up even when the ground itself is more straightforward.
Check the access beforehand − around blocks of housing and narrow roads.
What About Demolition?
If on the block there is an old house, garage, or other structure then the demolition can be a major part of site preparation.
The price will follow from the area of the building, construction materials, and ease of access. Disposal costs may also differ according to the type of waste material generated.
Demolishing a building is not just as easy as knocking it down; hazard materials will require specialist handling.
Know Your Site Costs Before Building
The site preparation can be minimal with a straightforward build or a big cost if your block is challenging. The only difference is the land itself.
Instead, ask for site-specific advice rather than relying on generalised estimates when dealing with builders in Marrickville.
Understanding excavation, access, soil, and drainage issues sooner rather than later makes for a more realistic budget that avoids nasty surprises during construction!