How far apart should fence posts be? Fence post spacing depends on the panels, rails, post width and installation system you choose. Many garden panels are sold around 1.8 metres wide, but their width is not automatically the distance between post centres. This fence post spacing guide explains how to measure a run, allow for gates and choose support that suits the site.
Fence Planning: Choose The System Before The Spacing
Correct post spacing begins with the fencing material, rather than a number marked on the ground. A panel fence needs posts positioned to accept the actual width of its fence panels, including the clearance or overlap specified for the fixings. A fence constructed from rails and individual boards may have different span limits. Unsupported rails can bend under their own weight, while solid fences also put wind load on the posts and foundations. Bringing posts closer together may help a suitable design, but it does not replace adequate rails, fixings and post depth.
Before you buy materials, measure the total length of the fence line and identify its corners, changes in level and gate openings. Confirm the fence location against the agreed property boundaries; a title plan alone may not establish an exact boundary. Discuss shared access with neighbours and check whether planning permission or other restrictions affect the fence height. The right spacing must work with those constraints as well as the chosen fence type.
Use a tape measure and a drawing to plan post locations before excavation. Mark whether each dimension describes a clear opening, an outside measurement or a centre-to-centre distance. Mixing those measurements is a common cause of panels that will not fit. Check for buried services before driving in markers or digging a post hole. Careful planning is much easier than repositioning concrete footings after they have set.
Setting Out Fence Posts Before Building
Start with the fixed points: end posts, corner posts and gate posts. These determine the shape of the fence run and the available space for intermediate line posts. A gate opening must suit the gate, hinges, latch and required clearances. Do not divide the entire run into equal sections and then squeeze a gate into whatever space remains.
A string line can show the intended alignment once the route has been checked for services. Measure from reliable reference points and check each proposed bay against the actual panel or rail specification. Wood fence post spacing must support the chosen timber sections; it is not determined by appearance alone. A straight fence should follow the agreed boundary without relying on an old fence as proof of the property line.
On flat ground, repeated panel widths often make setting out straightforward. Slopes, short finishing bays and changes in direction need separate attention. Establish a target spacing for each part of the run, then check whether the system permits a cut-down panel or a purpose-made section. Adjust spacing on the drawing first, and verify the whole layout before you install the posts.
Fence Post Spacing: What Does 1.8 Metres Mean?
There is no single standard spacing suitable for every fence. For pre made panels, use the manufacturer's actual panel dimensions and installation instructions. A nominal six-foot panel may be approximately 1.83 metres wide, while another product measures 1.8 metres. Post spacing also depends on the post width and whether panels sit between posts, slide into grooves or overlap the post faces. Confirm the required measurement rather than treating “six feet apart” as a universal rule.
Wood fences can use closeboard panels, individual boards, post-and-rail sections or open picket fences. Each fence type needs a suitable support layout. Picket spacing concerns the gaps between upright boards, whereas post spacing concerns the structural bays; the two measurements serve different purposes. Vinyl panels, metal systems and chain link fences have their own fittings and design requirements, so copying the dimensions of a neighbouring wooden fence can lead to mistakes.
For a rail-built fence, match standard lumber lengths only where the chosen rail size and fixing details allow the resulting span. Buying longer rails does not automatically justify wider spacing. Fence height, wind exposure, soil conditions and the weight of attached boards all affect the support required. A stable fence depends on the posts, rails, connections and foundations working together, rather than on post spacing alone.
If you are comparing fencing solutions, ask the installer to explain the clear bay width, post centres and foundation requirements for your particular site. There is no basis for applying a 1.8-metre rule to every wire fence or garden boundary. For advice on timber panels and professional fencing installation , contact MD Fencing & Decking. We can discuss the proposed fence location, access and finish before recommending a suitable layout for your garden.
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Clear Openings And Post Centres: A Worked Example
The clear opening is the space between the facing sides of two posts. Centre-to-centre post spacing runs from the middle of one post to the middle of the next. With square posts of equal width, the centre measurement is the clear opening plus one post width. For example, a 1.8-metre clear bay between 100-millimetre posts gives 1.9-metre centres. That is a measurement example, not a recommended span for every panel system.
Check the product before marking the ground. Jacksons' horizontal hit-and-miss panels, for example, are specified as 1.83 metres wide. A 1.8-metre and a 1.83-metre panel differ by 30 millimetres; across five panels that difference reaches 150 millimetres before post allowances. Grooved posts and fence clips can also change how the panel fits. The manufacturer's dimensions take priority over a general fence post spacing guide.
For quick reference, 6 feet equals 1.8288 metres, 8 feet equals 2.4384 metres and 10 feet equals 3.048 metres. These are unit conversions, not structural limits. A recommendation of “6 to 8 feet” needs a specified fence design behind it. Do not assume that 8 feet apart is suitable simply because a rail of that length is available.
How Many Posts Will A Straight Fence Need?
For one uninterrupted straight run with five bays, you normally need six posts: one at each end and four between the bays. If those five bays each have a 1.8-metre clear opening and all six posts are 100 millimetres wide, the overall outside-to-outside length is 9.6 metres. The distance between the centres of the terminal posts is 9.5 metres. This distinction matters when the total length on your drawing was measured between walls or other fixed features.
To decide how many posts to order, count the bays on the actual layout rather than dividing an outside measurement by a nominal panel width. Corners, gates and separate fence sections change the count. On a custom rail-built fence, an installer may divide a run into equal sections below the permitted maximum span. Fixed-width panels do not necessarily allow the same adjustment. Plan the final short bay before buying materials to reduce waste and avoid future repairs.
A fence run does not always finish neatly on a full panel. Ask whether the selected product can be shortened while keeping its framing and structural integrity. Narrower spacing in one finishing bay may be preferable to stretching several panels beyond their intended fit. Measure the opening in more than one place, particularly beside a wall that may not be vertical.
Gate Posts, Corner Posts And End Posts
Gate posts carry different loads from ordinary line posts. Hinges transfer the gate's weight to the supporting post, and opening or closing the gate creates additional movement. Allow for that duty when choosing the post and foundation. A heavy gate may require posts and fixings different from those used along the rest of the fence. Clearances must come from the gate supplier's instructions, not from a guess at the space between two posts.
Corner posts connect runs in two directions and need connections that suit both sides. Their position establishes the geometry of the fence, so check the angle before setting them. End posts finish a run and support its final bay. For strained wire systems, terminal posts may also resist tension; placing one post at a corner does not automatically mean it can take forces in two directions simultaneously. Use the system's specified terminal assemblies and bracing.
Soil Conditions, Post Depth And Foundations
Proper installation starts below ground. Soil type, drainage, fence height and exposure influence the required foundation. Sandy soil, soft fill and ground disturbed by earlier building work may need a different solution from firm undisturbed soil. Digging the same post hole at every location without checking ground conditions can leave some fence posts poorly supported.
Rules such as burying “one third” of a post are rough shortcuts, not a substitute for a suitable specification. Check the required post depth, hole dimensions and concrete details for the product and site. Do not simply dig deeper when you encounter an obstruction: stop, identify it and check for buried services. Roots, drains and utility cables can affect both safe excavation and the proposed fence location.
Concrete footings need correctly prepared holes and a mix used according to its instructions. Brace posts while the footing sets, check alignment and keep panel loads off them until the stated curing requirement is met. Wooden posts also need a timber treatment suitable for their intended exposure, including ground contact where applicable. The right foundation helps ensure stability; closer spacing cannot compensate for an unsuitable footing.
Wind Exposure: A Current UK Context
The Met Office's 2025/26 storm-season summary records four storms named by the UK, Ireland and Netherlands group, plus three storms named elsewhere in Europe that affected the UK: seven named storms in that season's timeline. This national count provides recent context for thinking about exposure. It does not calculate wind pressure on a particular garden fence or predict whether it will fail.
For an exposed boundary, assess the complete fence construction rather than changing the distance between posts in isolation. Tall, solid fences catch more wind than otherwise similar open designs, but the load also depends on the site and structure. An installer may specify closer spacing, stronger rails, different posts or larger foundations. Open fencing can offer a different balance of privacy and exposure; personal preference still needs to fit the structural design.
If the garden faces open countryside, sits on a hill or funnels wind between buildings, explain that before accepting a standard layout. High wind exposure is a reason to check the design, not to promise that posts a particular number of feet apart will prevent every failure. Inspect loose connections and leaning posts promptly, because movement can damage neighbouring bays.
Spacing On Slopes And For Other Fence Types
On sloping ground, decide whether the fence will step between level panels or rake with the slope. Rigid panels cannot necessarily be tilted or trimmed to follow steep grades. Measure the horizontal bay width as well as the change in ground level, and check the ground clearance beneath each section. Longer posts may be needed at some positions without increasing the permitted rail span.
Chain link uses intermediate posts and terminal assemblies to support mesh and its tensioning components. The Jacksons chain-link installation instructions distinguish line posts from end, corner and gate posts and explain the relevant fittings. They should not be read as a universal spacing rule for every chain link product. Confirm the specified spacing, top rail or straining-wire arrangement and foundation details for the system being supplied.
Vinyl panels, metal railings and agricultural wire fences likewise have their own requirements. A figure such as 10 feet may appear in advice for a particular system, but it should not be transferred to garden panels without checking the design. The ideal spacing is the spacing that the chosen fence can safely support in its intended location. Do not use livestock fencing advice to size a residential privacy fence.
Final Checks Before You Dig
Review the layout from one end to the other. Check the fence line, each clear opening, the post centres, gate clearances and any shorter finishing bay. Confirm where rails join and how panels attach. Keep a record of the measurements so the installer can repeat the intended layout rather than estimate it as work progresses. This is the practical way to establish proper spacing and prevent avoidable fitting problems.
The HSE guidance on underground cables identifies planning, locating services and safe excavation as the key elements of a safe system of work. Service plans alone do not prove the exact location of a cable. Before using stakes, a post hole digger or powered equipment, arrange the checks needed for the site and use appropriate locating and excavation methods. If the route cannot be verified safely, obtain competent assistance.
Finally, ask for a clear specification that identifies the fencing material, post spacing, foundation requirements and installation method. That makes quotations easier to compare and helps you save money through suitable materials and fewer mistakes. A good layout balances appearance, support and access without relying on a single generic measurement.
Planning a garden fence in Milton Keynes or Buckinghamshire? Contact MD Fencing & Decking to discuss the layout, materials and installation. If your project also includes garden decking , we can help you plan that part of your outdoor space too.
