Practical points for boundary work in Hampstead
Water company build-over positions
Public sewers can run beneath private gardens, and water companies generally require notice, and sometimes formal approval, before any structure — including some fence post foundations — is built close to or over them.
The exact rules and required clearance distances vary by water company, but ignoring a known public sewer line when positioning posts risks a dispute or requirement to remove work later.
A free sewer map is normally available from the relevant water company, which is worth requesting before finalising post positions on any plot with an older or shared drainage system.
Boundary fence position relative to a neighbour's extension
A recently built extension or conservatory next door can sometimes have its own planning conditions relating to adjacent boundary treatments, particularly around overlooking or privacy screening.
Where this applies, it's the extension's planning history rather than general permitted development rules that governs what's expected at that specific boundary.
Checking a neighbour's relevant planning permission, available on the council's public register, can clarify this before assuming standard rules apply to that stretch of boundary.
Seasonal restrictions on hedge and vegetation clearance
Clearing vegetation or a hedge to make way for a fence during bird nesting season, broadly March to August, risks disturbing an active nest, which is a wildlife offence regardless of whether the fencing work itself is otherwise unrestricted.
A quick visual check for active nests before cutting back growth is standard practice, and where a nest is found the sensible step is working around it rather than pushing ahead with clearance.
Outside nesting season, most routine hedge cutting ahead of fencing work has no seasonal restriction, though thicker or more established hedgerows may still need the checks covered elsewhere for protected hedgerows.
Keeping fence design clear of utility meter access points
Gas, electric and water meter boxes set into or near a boundary wall or fence line need to remain accessible for reading and emergency isolation, so a new fence or gate design shouldn't block or panel over an existing meter box without providing an equivalent access route.
This is occasionally missed on a full boundary replacement where the new design closes up an old gap that happened to give meter access, leading to a return visit to cut an access panel back in.
Checking for meter boxes and stopcock covers along the boundary line during survey avoids this rework.
Right to light and a tall boundary fence
There's no general legal 'right to a view' or automatic entitlement to sunlight in a garden, so a taller boundary fence built within the applicable height limits usually isn't unlawful purely because it shades a neighbour's garden.
Right to light law in England mainly concerns windows in buildings that have enjoyed light for a long period, rather than open garden space, and even then applies in fairly narrow circumstances.
Where a taller fence is likely to significantly affect a neighbour's garden, discussing it before building tends to prevent ill feeling even where there's no strict legal obstacle.
Snow load and drifting against capping
Snow rarely loads a vertical fence face directly, but it drifts and settles along the top of a run, especially against capping or trellis toppers that catch and hold it rather than shedding it.
A sustained thaw-freeze cycle on wet capping timber is a common cause of splitting, since water trapped in the grain expands as it freezes and opens up hairline cracks that widen each winter.
A capping profile with a slight fall to shed water, rather than a flat top, reduces how much moisture sits there in the first place.
