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Treated Fencing Posts | Timber Fence Posts for Gardens & Boundaries

Browse our range of pressure-treated timber fence posts, perfect for all types of garden fencing, boundary enclosures, and landscaping projects. Available in a variety of lengths and sizes, our fencing posts are designed for durability and long-lasting performance in outdoor conditions.

✅ UC4-treated for ground contact and rot resistance
✅ Available in square and round profiles
✅ Ideal for closeboard, panel, and agricultural fencing
✅ Multiple sizes: 75x75mm, 100x100mm, 150x75mm, 100mm x 100mm and more
✅ Compatible with concrete gravel boards and timber rails

Our treated wooden fence posts are responsibly sourced and suitable for both DIY fencing projects and professional installations. Order online with UK-wide delivery available.

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100mm x 100mm (4"x4") square sawn Fence posts

Alter Supplies
£10.92 - £22.86
£10.92 - £22.86
£10.92
£7.32 - £18.60
£7.32 - £18.60
£7.32
In stock

100mm x 100mm (4"x4") Square Sawn Fence Posts Enhance the durability and aesthetics of your fencing, decking, or domestic applications with ou...

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£10.92 - £22.86
£10.92 - £22.86
£10.92
£7.32 - £18.60
£7.32 - £18.60
£7.32
Save up to 19% Save %
Save up to 19% Save %

75mm x 75mm (3"x3") square sawn fence posts

Alter Supplies
£6.16 - £8.20
£6.16 - £8.20
£6.16
£5.00 - £7.08
£5.00 - £7.08
£5.00
In stock

75mm x 75mm square fence posts @ Various lengths, pressure treated green, Square sawn. Used for the construction of fencing, decking or domestic ap...

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£6.16 - £8.20
£6.16 - £8.20
£6.16
£5.00 - £7.08
£5.00 - £7.08
£5.00
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Save up to 21% Save %

75mm x 75mm (3"x3") square sawn fence posts, pointed

Alter Supplies
£4.79 - £7.36
£4.79 - £7.36
£4.79
£4.13 - £5.82
£4.13 - £5.82
£4.13
In stock

75mm x 75mm Pointed fence posts @ Various lengths, pressure treated green, Square sawn. Used for the construction of fencing, decking agricultural ...

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£4.79 - £7.36
£4.79 - £7.36
£4.79
£4.13 - £5.82
£4.13 - £5.82
£4.13
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Save up to 23% Save %

100mm x 100mm (4"x4") square sawn Fence posts, pointed

Alter Supplies
£11.21 - £12.76
£11.21 - £12.76
£11.21
£8.65 - £10.58
£8.65 - £10.58
£8.65
In stock

100mm x 100mm (4"x4") Square Sawn Fence Posts, Pointed Enhance your outdoor space with our 100mm x 100mm (4"x4") square sawn fence posts. Thes...

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£11.21 - £12.76
£11.21 - £12.76
£11.21
£8.65 - £10.58
£8.65 - £10.58
£8.65
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Timber Peg 0.6m x 50 x 50 (2ft 2 x2) - 25 pegs per pack (Sold individually)

Alter Supplies
£1.50 - £1.50
£1.50
£1.50 - £1.50
£1.50
In stock

25 pegs per pack - sold individually

£1.50 - £1.50
£1.50
£1.50 - £1.50
£1.50

1.65M x 75 x 75 Post Seconds (5ft6 3 x 3) Stobbs Post 2nd Class point

Alter Supplies
£4.56 - £4.56
£4.56
£4.56 - £4.56
£4.56
In stock

1.65M x 75 x 75 Post Seconds (5ft6 3 x 3) Stobbs Post 2nd Class point Upgrade your fencing or decking with our top-quality 75mm x 75mm pointed...

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£4.56 - £4.56
£4.56
£4.56 - £4.56
£4.56

150 x 150 Post (6 x 6) Post sq

Alter Supplies
£28.77 - £55.20
£28.77 - £55.20
£28.77 - £55.20
£28.77
In stock

150 x 150 Post (6 x 6) Post sq Upgrade your outdoor space with our durable and versatile 150 x 150 Post (6 x 6) Post sq. Made from high-qu...

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£28.77 - £55.20
£28.77 - £55.20
£28.77 - £55.20
£28.77

2.6m x 75mm machine round pointed treated

Alter Supplies
£6.30 - £6.30
£6.30
£6.30 - £6.30
£6.30
In stock

2.6m x 75mm Machine Round Pointed Treated Enhance your outdoor space with our 2.6m x 75mm machine round pointed treated wooden po...

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£6.30 - £6.30
£6.30
£6.30 - £6.30
£6.30
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2.4M x 100mm x 100mm (8ft x 4"x4") square sawn Fence posts

Alter Supplies
£13.80
£13.80 - £13.80
£13.80
£11.40
£11.40 - £11.40
£11.40
In stock

2.4m x 100mm x 100mm (8ft x 4"x 4") Square Sawn Fence Posts Enhance the durability and aesthetics of your fencing, decking, or domestic applicatio...

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£13.80
£13.80 - £13.80
£13.80
£11.40
£11.40 - £11.40
£11.40
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1.65m x 73mm machine round pointed uc4 treated PERMAPOST

Alter Supplies
£4.67 - £4.67
£4.67
£4.67 - £4.67
£4.67
In stock

1.65m x 73mm Machine Round Pointed Treated Enhance Your Fencing with Durable Posts Upgrade your fencing with our 1.65m x 73mm Machine Round Pointe...

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£4.67 - £4.67
£4.67
£4.67 - £4.67
£4.67

150 x 75 Post (6 x 3) Post point - Highway Spec incised

Alter Supplies
£12.86 - £15.00
£12.86 - £15.00
£12.86 - £15.00
£12.86
In stock

The 150 x 75 Post (6 x 3) Pointed post - Highway Spec incised is a durable and sturdy product designed for road construction and highway use. With ...

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£12.86 - £15.00
£12.86 - £15.00
£12.86 - £15.00
£12.86

Reuglarised 4.8M x 100 x 75 Post (16ft 4 x 3) Post c16

Alter Supplies
£30.24 - £30.24
£30.24
£30.24 - £30.24
£30.24
In stock

£30.24 - £30.24
£30.24
£30.24 - £30.24
£30.24

2.4M x 150 x 150 Post (8ft 6 x 6) Post sq c/w PYRAMID TOP HCD 30 years service life

Alter Supplies
£61.90 - £61.90
£61.90
£61.90 - £61.90
£61.90
In stock

2.4M x 150 x 150 Post (8ft 6 x 6) Post sq c/w PYRAMID TOP HCD 30 years service life Enhance your outdoor space with our durable 2.4M x 150 x 1...

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£61.90 - £61.90
£61.90
£61.90 - £61.90
£61.90