Retaining Wall Checklist - Free Download

What's in the retaining wall Newcastle checklist

1. 1. Measure the wall height accurately, from the base of the excavation to the top

   The NSW 600mm exempt-development threshold is measured this way, not from the ground you see - get it wrong and you may skip a required approval step.

2. 2. Check the setback from every boundary

   An exempt wall needs at least 1m clearance from each lot boundary - closer than that and you're into a Complying Development or DA (Development Application assessed by council) pathway regardless of height.

3. 3. Check the separation from any other retaining wall or structural support on the site

   The exempt-development test requires at least 2m horizontal separation from other structures - easy to miss on a block with an existing wall.

4. 4. Locate any easements, sewer or water mains nearby

   Exempt walls need 1m clearance from registered easements and mains - a site plan or a call to your water authority settles this quickly.

5. 5. Confirm where stormwater will go before you dig

   An exempt wall must have drainage connected to the site's approved stormwater system - this is a condition of the exemption, not an optional extra.

6. 6. Check for a heritage overlay or conservation area listing

   Heritage-listed properties and conservation areas carry extra planning controls that can override the standard exempt-development test.

7. 7. Get a soil or site assessment for anything approaching engineered-wall territory

   Newcastle's coal-measures clay and shale react differently to its sandstone-based suburbs - the right footing depth depends on knowing which you've got.

8. 8. Ask whether your job needs a licensed contractor

   In NSW, a structural landscaping licence is required once the job's labour and materials value exceeds $5,000 - a decision made on VALUE, separately from the height/approval question.

9. 9. Ask for a written contract once the job passes $5,000

   A written contract is standard practice above this value and protects you if something goes wrong with scope, timing or price.

10. 10. Confirm Home Building Compensation Fund cover applies once the job exceeds $20,000

    HBCF insurance, through icare, is required over this threshold and protects you if the contractor cannot complete the work.

11. 11. Ask what drainage detail is included in the quote

    Agi pipe (perforated drainage pipe), gravel backfill and geofabric (a filter fabric that stops the drain clogging) wrapping behind the wall are what actually stop most retaining wall failures - if it's not in the quote, ask why.

12. 12. Get the material's realistic service life explained, not just the price

    A cheaper timber wall and a pricier concrete or sandstone wall can have very different lifespans - factor that into the real cost comparison.

13. 13. Ask who is designing and certifying the wall if it needs engineering

    In NSW this is a structural or geotechnical engineer working to AS 4678, registered CPEng or NER - a different certification framework to other states, so a generic interstate answer won't be right.

14. 14. Photograph the site before work starts

    A clear before-record protects both you and the contractor if there's ever a dispute about existing conditions, fences or neighbouring structures.