A 1.8 metre Colorbond fence is the most private option available to most Central Coast homeowners without council approval, because it is solid, has no sightlines through it, and needs almost no maintenance.
That answer holds for the majority of suburban blocks, but it is not universal. Lapped timber gives near-total privacy with a different look, aluminium slats trade a little privacy for airflow and a modern finish, and the moment your block slopes or faces the street, the height rules change what you are allowed to build. Before you book a measure, it is worth knowing which constraint applies to your yard.
What actually makes a fence private?
Privacy comes from three things: height, the absence of gaps, and how the fence handles a slope. Material choice is downstream of all three.
Height determines what a standing adult can see over. Gaps determine what anyone can see through, and this is where fences that look private on a display board fail in a real yard. A slatted fence with 20mm gaps blocks a direct view but not an angled one, so a neighbour at the far end of their deck sees straight through it even though someone standing square-on does not.
The third factor catches people out. On a sloping block, a fence is either raked to follow the ground or stepped in panels. Stepping creates triangular gaps at the base of each step unless the fence is set up to close them, and those gaps sit at exactly the height that matters if you have a dog or small children.
How high can you build a privacy fence in NSW without council approval?
Behind the building line you can build to 1.8 metres, and forward of the building line the limit drops to 1.2 metres. These are the exempt development standards in clause 3.29 of the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008, and they apply across Central Coast Council along with the rest of NSW.
The clause carries several conditions people miss:
- Maximum 1.8 metres above existing ground level behind the building line
- Maximum 1.2 metres above existing ground level forward of the building line
- On a sloping site where the fence is stepped, no higher than 2.2 metres at each step
- Metal components must be low-reflective, factory pre-coloured materials
- No barbed wire and no electrification
- Any entrance gate must not open outward
Go above those heights, and you need approval, which for a front boundary is rarely granted. Corner blocks carry additional sightline restrictions that vary, so a corner block is the one case worth a call to Central Coast Council before ordering materials.
The practical upshot: 1.8 metres is your privacy ceiling for a side or rear boundary. Everything below is about choosing what fills that height.
Why is Colorbond the default privacy fence on the Central Coast?
Colorbond is the default because a 1.8 metre sheet is completely solid, there is nothing to see through at any angle, and it needs no ongoing treatment. It is the material most Central Coast privacy fences are built from, and it is the one we install most often.
Sheets run vertically between posts with no gaps at all. Colour is factory-applied rather than painted on site, so there is no repainting cycle. On a coastal block that matters more than it does inland, because a fence that needs re-coating every few years in salt air becomes an ongoing job rather than a one-off.
The trade-off is aesthetic. Colorbond reads as a fence, and it blocks airflow completely, which on a hot still day makes a small enclosed yard feel warmer than a slatted alternative would.
Does lapped timber give the same privacy?
Lapped and capped timber gives effectively the same privacy as Colorbond when it is built correctly, with overlapping palings and no light between them. The difference is upkeep and how it ages.
Timber needs oiling or staining on a cycle to hold its colour and resist moisture. Palings cup and twist over time, and once they do, gaps open up between them, which is privacy lost gradually rather than all at once. In salt-exposed positions the fixings matter as much as the timber itself.
Timber is the right choice when the look is the priority, particularly on older Central Coast properties where a Colorbond fence would sit awkwardly against the house. It is the wrong choice for anyone who wants to build a fence once and not think about it again.
Do aluminium slats give you real privacy?
Aluminium slats give partial privacy that depends entirely on slat spacing, and the specification is where the decision gets made. A tightly spaced slat fence approaches full privacy from most viewing angles. A widely spaced one is a screen, not a privacy fence.
What slats buy you is airflow and a contemporary finish, which is why they suit courtyards, pool surrounds and front fencing within the 1.2 metre limit. Powder-coated aluminium handles salt air well and needs a rinse rather than a re-coat.
If privacy is genuinely the primary goal rather than one of several, slats are a compromise. If you want most of the privacy plus a breeze through a small yard, they are the better answer than Colorbond.
| Colorbond | Lapped timber | Aluminium slats | |
|---|---|---|---|
| Privacy at 1.8m | Complete | Complete when new | Partial, spacing dependent |
| Airflow | None | Minimal | Good |
| Upkeep | Occasional rinse | Oil or stain on a cycle | Occasional rinse |
| Salt-air performance | Strong | Fixings and timber both need attention | Strong |
| Ages by | Fading over many years | Cupping, twisting, gapping | Chipping at contact points |
| Best for | Most suburban side and rear boundaries | Character homes where look leads | Courtyards, front fences, pool surrounds |
What happens to privacy when the block slopes?
On a sloping block, privacy depends on how the fence follows the ground, and this is the single most common reason a finished fence disappoints. Sloping and stepped sites are covered specifically in the exempt development clause for a reason.
A raked fence follows the fall of the land with the top line parallel to the ground, keeping full height the whole way. A stepped fence holds each panel level and drops in increments, which looks cleaner along the top but leaves a wedge of open ground under the high side of every step. Those wedges have to be closed with plinths or infill, or you have a privacy fence with gaps along the bottom.
A lot of Central Coast blocks fall away steeply, particularly through Avoca Beach, Saratoga, Davistown and Terrigal. Getting the rake, step and plinth decision right at the measure is more important on those blocks than which material you pick. If you want how each material handles a coastal block, the durability side is covered separately.
Who pays for a privacy fence on a shared boundary?
Cost for a dividing fence is shared between neighbours under the Dividing Fences Act 1991 (NSW), but only up to the standard of a “sufficient” fence for the area. If you want something above that standard, you pay the difference.
In practice, if your neighbour is happy with a basic fence and you want 1.8 metre Colorbond in a specific colour, the shared portion covers what is standard locally and the upgrade is yours. The formal process starts with a Fencing Notice served on the adjoining owner. Where a dividing fence also forms part of a pool barrier, the Swimming Pools Act 1992 takes precedence and the cost sits with the pool owner.
Getting agreement in writing before work starts prevents most of the disputes we see, and it is worth doing even with a neighbour you get on with.
So which privacy fence should you choose?
For most Central Coast homes the answer is 1.8 metre Colorbond on the side and rear boundaries, because it delivers complete privacy, handles salt air, and requires nothing from you afterwards. Choose lapped timber if the appearance of the fence matters more than the maintenance schedule. Choose aluminium slats if you want privacy plus airflow in a smaller or enclosed yard, or if you are fencing forward of the building line where 1.2 metres is the ceiling anyway.
Most yards end up with a combination. A Colorbond rear boundary, slats across a courtyard, and something lower and open at the front is a common and sensible result rather than a compromise. To weigh every option, including glass, compare all four materials side by side.
Next steps
The privacy question resolves quickly once someone walks the boundary, checks the fall, and works out where the sightlines actually come from. In most cases the answer is not what people assume before the measure.
Avoca Beach Fencing & Gates holds NSW contractor licence 314691C and installs Colorbond, timber, aluminium slat, tubular, glass, rural and security fencing. Because we fit all of them, the recommendation you get is based on your block rather than on the one product we happen to stock. We quote across the suburbs we service, from Woy Woy through to Budgewoi.
