Total Concrete Required
0.00 m³
Including wastage allowance
Instant concrete volume, bag count & cost estimates for Northern Beaches projects
Plan your slab, driveway, footing or column pour with confidence. Our free Northern Beaches concrete calculator delivers accurate m³ results and 2026 local pricing for Manly, Dee Why, Narrabeen, Avalon and beyond.
Accurate concrete calculations for residential and commercial projects across the Northern Beaches — from Manly to Palm Beach
Enter your dimensions and get exact cubic metre (m³) volumes in seconds. Our Northern Beaches concrete calculator accounts for slab thickness, footing depth and wastage so you never over- or under-order concrete for your Manly, Dee Why or Avalon project.
Get realistic cost estimates based on current 2026 ready-mix concrete prices across the Northern Beaches, NSW. Compare bagged concrete versus truck-delivered mixes and plan your budget accurately before contacting local Northern Beaches suppliers.
Whether you are pouring a pool surround in Collaroy, a driveway in Narrabeen, footings for a new deck in Avalon or a structural slab in Brookvale, this calculator handles slabs, strip footings, pad footings and circular columns with equal precision.
Select your pour type and enter dimensions to calculate concrete volume and 2026 cost estimate
Typical Northern Beaches residential concrete slab showing length, width, depth, timber formwork, compacted sub-base and steel mesh reinforcement
The Northern Beaches concrete calculator is a free online tool built specifically for homeowners, builders and concreters planning projects across the Northern Beaches local government area of Sydney, NSW. It covers all suburbs from Manly and Freshwater in the south to Palm Beach and Avalon in the north, including Dee Why, Narrabeen, Mona Vale, Warriewood, Brookvale, Collaroy and Cromer. The calculator instantly converts your project dimensions into cubic metres (m³), calculates how many 20kg bags you need if hand-mixing, and generates a realistic 2026 cost estimate based on local Northern Beaches pricing.
Due to the unique geography of the Northern Beaches — including steep hillside blocks, coastal access restrictions and high-demand building activity — concrete costs and logistics can differ significantly from the Sydney CBD or Western Suburbs. This calculator is tailored to help you budget accurately for your specific Northern Beaches site before contacting a concrete supplier or licensed concreter.
Many Northern Beaches properties have restricted vehicle access — particularly in Manly, Fairlight and beachside suburbs — making concrete pump hire essential. Always factor in pump costs of $500–$900 when calculating your total project budget. Use our alfresco slab calculator if you are pouring an outdoor entertaining area.
Getting your concrete estimate takes under a minute. Follow these five steps for accurate results on any Northern Beaches project:
Choosing the right concrete strength grade is critical for structural performance and durability on the Northern Beaches. The coastal environment — with salt-laden air from the Tasman Sea and sandy soils in many areas — can accelerate concrete degradation if the incorrect grade or mix is specified. Northern Beaches properties near the ocean should always use a concrete mix with a low water-to-cement ratio and consider adding a corrosion inhibitor admixture to protect steel reinforcement from chloride attack.
| Grade | Strength | Best Use — Northern Beaches | Est. Price / m³ (2026) | Notes |
|---|---|---|---|---|
| N20 | 20 MPa | Garden paths, non-structural fills | $185 – $210 | Not suitable for coastal slabs |
| N25 | 25 MPa | House slabs, patios, shed floors | $195 – $230 | Most common residential grade |
| N32 | 32 MPa | Driveways, footings, pool surrounds | $215 – $255 | Recommended near coastal areas |
| N40 | 40 MPa | Commercial slabs, seawalls, piers | $245 – $290 | Engineer specification required |
Concrete prices on the Northern Beaches are among the higher end of Sydney pricing due to the peninsula's geography, limited access routes and strong demand from the active residential construction and renovation market. The 2026 Northern Beaches concrete cost for ready-mix delivered by truck ranges from approximately $190 – $290 per m³ depending on grade, supplier and the distance from batching plants in Brookvale or Mona Vale. Small orders under 3 m³ frequently attract minimum load surcharges.
Ready-mix concrete delivered to the Northern Beaches in 2026 costs approximately $190 – $290 per m³ depending on grade and access. Properties in Palm Beach, Avalon and other northern suburbs may attract a delivery surcharge due to travel distance from batching plants. Minimum load charges typically apply for orders under 3 m³.
For small pours under 0.5 m³, purchasing 20kg bagged concrete from Bunnings Brookvale or local hardware stores is a practical option. One 20kg bag yields approximately 0.009 m³. Expect to pay $9–$13 per 20kg bag in 2026. For pours over 1 m³, ready-mix delivery almost always proves more economical.
Concrete pump hire is commonly required on the Northern Beaches due to steep access, narrow laneways and rear-of-block build sites common in Manly, Fairlight and Balgowlah. Pump hire in the Northern Beaches area adds approximately $500 – $900 to your project cost in 2026. Always confirm pump access with your concreter before ordering.
Professional concrete finishing on the Northern Beaches — including screeding, floating, trowelling and sealing — costs approximately $40 – $70 per m² in 2026. Exposed aggregate, honed and salt-finish concrete are all popular on Northern Beaches properties and add $15 – $35 per m² above a standard broom finish price.
Properties within 1km of the coastline on the Northern Beaches should use concrete with a minimum N32 grade and specify a low water-to-cement ratio (W/C ≤ 0.45) to resist chloride-induced corrosion of steel reinforcement. The NSW Government's Coastal Management Act 2016 may also affect construction near the foreshore — always check with Northern Beaches Council before commencing any slab or structural concrete work close to the beach.
| Project Type | Typical Size | Volume (m³) | Bags (20kg) | Est. Total Cost 2026 |
|---|---|---|---|---|
| Garden Path | 10m × 1m × 75mm | 0.83 m³ | ~95 bags | $200 – $400 |
| Alfresco / Patio Slab | 5m × 4m × 100mm | 2.2 m³ | ~265 bags | $700 – $1,100 |
| Driveway | 10m × 4m × 150mm | 6.6 m³ | Ready-mix | $2,200 – $4,000 |
| House Slab | 15m × 10m × 110mm | 18.15 m³ | Ready-mix | $5,000 – $8,500 |
| Pool Surround | Perimeter 30m² × 100mm | 3.3 m³ | Ready-mix | $1,200 – $2,200 |
| Strip Footings | 36m × 0.4m × 0.6m | 8.64 m³ | Ready-mix | $2,400 – $4,200 |
Working with concrete on the Northern Beaches comes with unique challenges compared to other parts of Sydney. Experienced local concreters recommend the following to ensure a successful pour:
If your Northern Beaches project requires more than 0.5 m³, order ready-mix delivery. For volumes over 1.5 m³, ready-mix is almost always the better choice — cheaper per m³, better consistency and less labour. For strip footings, use our allowable bearing pressure calculator to confirm your footing design before ordering concrete.
Apply for building permits, check development overlays and confirm any requirements for concrete works on your Northern Beaches property. Northern Beaches Council covers all suburbs from Manly to Palm Beach.
Visit Northern Beaches Council →Verify your concreter or builder holds a valid NSW contractor licence before engaging them for structural work. NSW Fair Trading provides a free online licence check tool for all licensed tradespersons.
Visit NSW Fair Trading →Australian Standard AS 3600 governs the structural design of concrete in Australia. Your engineer will reference this standard for grade selection, cover to reinforcement and durability design for Northern Beaches coastal exposures.
Standards Australia →