Retaining walls in Hawkesbury, built to last.

Sandstone block retaining wall costs in the Hawkesbury typically range from $300 to $600 per lineal metre depending on wall height, access, soil conditions, and whether A Grade or B Grade blocks are used. Our quotes are fixed-price and fully inclusive: excavation, footings, blocks, drainage, labour, equipment, and clean-up. Call Jesse on 0432 085 976 for a free site visit and written quote.

Standard 2-metre sandstone retaining wall blocks measure roughly 2000mm long by 400mm high by 400mm deep, and weigh about 1.4 tonnes each. Both A Grade and B Grade share the same dimensions and weight - only the face finish and colour variation differs. That's why every sandstone wall we build uses a purpose-made block grab on our 5.5t Kobelco: nobody is picking these up by hand.

Our sandstone blocks are sourced from local NSW sandstone quarries and delivered directly to your Hawkesbury site. Because the stone is locally quarried, the colour and texture match the natural sandstone already present under much of the Hawkesbury - especially around Kurrajong, Grose Vale, Bowen Mountain, and the Agnes Banks escarpment. Your wall ends up looking like it grew out of your block.

We're based in East Kurrajong and service the entire Hawkesbury: Kurrajong, Kurrajong Heights, Windsor, South Windsor, Pitt Town, Freemans Reach, Glossodia, Grose Vale, Wilberforce, Richmond, North Richmond, Agnes Banks, Oakville, Cattai, Bowen Mountain, and Bilpin. We also take on larger jobs across Western Sydney including Penrith, Glenbrook, and the Blue Mountains.

A Grade sandstone blocks have a cleaner, more uniform face and are typically chosen for front yards and feature walls where appearance matters most. B Grade blocks are structurally identical but have more natural variation in colour and texture. Both come in 2-metre lengths. Jesse can show you samples and help you choose the right grade for your project.

A sandstone block wall built with proper drainage lasts 50+ years. Timber sleepers rot in 10-20, concrete sleepers crack and lean in 20-30, but sandstone is the original structural material - it doesn't degrade. The only thing that moves a sandstone wall is water pressure from behind it, and we eliminate that with socked agg lines plumbed to stormwater, aggregate backfill, and geofabric on every wall.

Yes, and that's one of its best features. Natural sandstone deepens in colour over the years, shaded faces grow moss and lichen, and the wall settles into the landscape. A Hawkesbury sandstone wall looks more at home at year 20 than year 1 - the opposite of render blocks or concrete sleepers, which look their best on day one.

Essentially zero. No sealing, no staining, no replacement. Occasional pressure wash if you want to remove moss, and keep the agg-line outlets clear of garden growth. Otherwise the wall is maintenance-free for decades.

Yes. Jesse personally visits every site to assess the job: access, soil conditions, drainage requirements, block count. You get a fixed-price written quote that includes everything. No obligation, no pressure.

Most sandstone retaining walls are built in 2 to 5 days depending on length, height, and site conditions. We typically schedule within 1 to 3 weeks of quote acceptance. You get a locked start date so you know exactly when the work begins.

The #1 cause is poor drainage. Water builds up behind the wall (hydrostatic pressure), pushes it forward, and it eventually leans or collapses. Hawkesbury clay - especially in South Windsor, Oakville and the east-rural suburbs - makes this worse. Every Madden wall includes aggregate backfill, socked agg lines plumbed to stormwater, and geofabric to prevent this. We also use proper roadbase footings so the wall doesn't shift or settle over time.

Absolutely. We remove the failed wall, excavate properly, and rebuild with correct footings and drainage so it doesn't happen again. We've replaced failed timber, concrete, and sandstone walls across the Hawkesbury.

Yes. Madden Earthworks Pty Ltd (ABN 86 683 469 712) carries $20 million public liability insurance. We're White Card certified, WHS compliant, and DBYD registered. Certificates of currency available on request.