Remedial Building Services
Sydney, NSW
NSW Fair Trading licence checked
Concrete cancer repairWaterproofing
Sydney remedial builder focused on concrete cancer repair, remediation and waterproofing.
Mainmark
Resin injection
Ground-engineering and non-invasive resin-injection specialist operating across Australia.
In greater Sydney, older apartment blocks and balconies see a lot of concrete cancer, while reactive clay suburbs see more footing movement and cracking.
As a 2025 guide, typical underpinning runs about $4,000 to $15,000 and concrete cancer repair varies widely with access -- a guide, not a quote. See the cost guide for the detail.
Use the provider's current licence, insurance and written scope as part of the hiring decision.
Common questions
What services is Mainmark listed for?
Mainmark is listed on this directory under Resin injection. That reflects publicly available information about the business, not a verified service list, so confirm exactly what Mainmark can do for your job directly with them.
Is Mainmark licensed and insured?
We do not hold or publish licensing or insurance status for any listed business. Ask Mainmark for current licence and insurance details, and use your state's building or fair trading regulator records as the independent source.
Should I get a structural engineer's assessment before contacting Mainmark?
For anything beyond hairline cosmetic cracking, yes. A structural engineer independently diagnoses whether footings have moved and why, and specifies the repair; a contractor like Mainmark then prices and carries out that repair. Getting the engineer's report first means every quote you get, including from Mainmark, is priced against the same diagnosis.
How much should I expect a job like this to cost?
Expect a range rather than a fixed number: common residential underpinning falls around $4,000 to $15,000, with concrete cancer repair depending heavily on access. Our cost guide has the detail; use it to sanity-check any quote you get from Mainmark.
Get quotes
Tell us what you are seeing and roughly where the property is. We will match you with a remedial or underpinning contractor serving your area.
Compare nearby
Sydney House Levelling
Sydney, NSW
House levelling and underpinning specialist serving greater Sydney.
CARE - Concrete & Corrosion Rehabilitation
Sydney, NSW
Waterproofing
CARE - Concrete & Corrosion Rehabilitation operates in the Banksmeadow, NSW area, offering remedial building services, including waterproofing. Contact them directly for a current quote.
Streamline Concrete Patching
Sydney, NSW
Concrete cancer repairStructural crack repair
Streamline Concrete Patching is a remedial building contractor based in Mona Vale, NSW, including concrete cancer repair and structural crack repair. Reach out directly to confirm availability and current rates.
Concrete Lifting Services
Sydney, NSW
Resin injectionStructural crack repair
Concrete Lifting Services operates in the Matraville, NSW area, offering remedial building services, including resin injection and structural crack repair. Contact them directly for a current quote.