Extensions in Maldon

Extending in Maldon

The clue is in the name: a town built on a hill, where the ground falls away from the High Street in both directions and takes your foundation design with it.

Maldon stands on a spur of rising ground above the tidal Chelmer and the head of the Blackwater estuary. The second half of the name is the Old English dun, a hill, and everything about building here follows from it. The High Street runs along the top of the ridge. The ground drops away north towards the Fullbridge and the river, and falls south east down to St Mary’s, the Hythe and the sailing barges on the quay. The parish held 14,938 people at the 2021 census.

Maldon District Council is the planning authority, from the offices on Princes Road, and the same district decides the shore villages north east of the town, Goldhanger among them. There is also a Maldon Town Council, and it is worth being clear about the difference: the town council is consulted on applications and its views carry weight as a consultee, but it does not determine them. The decision, the conditions and the enforcement all sit with the district.

A conservation area from 1969, and a big one

Maldon was designated within two years of conservation areas being invented, and the boundary takes in far more than the shopping street.

The designation dates from 1969, which puts it among the earliest in the country, conservation areas having existed only since 1967, and it is recorded in more than one part rather than as a single tidy block. That matters because people assume the designation is the High Street and their Victorian terrace two streets down is outside it. Frequently it is not. A large share of the town’s older housing sits on designated land, and the boundary is checked against the address as the first thing we do.

Inside it the property is article 2(3) land. Class A stops permitting a side extension and a two storey rear extension, cladding needs an application, the larger single storey rear extension route that runs on prior approval is unavailable, and Class B stops permitting a rear dormer. No Article 4 direction is recorded over the town, and it costs nothing to have the council confirm that against your address.

The restriction people trip over here is a different one, because a hill town is a town of walls. In a conservation area, demolition is itself controlled. Taking down an unlisted building, or a wall, gate or fence, needs planning permission for the demolition where it exceeds the exemption thresholds, and for walls that threshold is one metre high where the wall abuts a highway, waterway or public open space and two metres elsewhere. Carrying out that demolition without consent is a criminal offence rather than a planning breach. Maldon has a great many old garden and boundary walls, several of them retaining ground, and “we took the wall down to get the digger in” is not a defence.

Listed, and what that does and does not remove

The High Street and the streets running off it carry a real density of listed buildings, and the standard piece of received wisdom about them is wrong.

The Moot Hall, fifteenth century and taken over by the corporation in 1576, sits on the High Street. All Saints has the only triangular church tower in England. St Mary’s above the Hythe has a Norman nave. Around and behind them are timber framed buildings wearing later brick and rendered fronts, and a listing frequently covers the whole of what is behind the front as well as the front itself.

Listing does not remove permitted development rights. It adds listed building consent as a second regime under separate legislation, and that regime is far broader than planning: it reaches inside the building, it covers work that would never count as development, and doing it without consent is a criminal offence. In practice the second consent is the harder one, which is precisely why people assume the first has already gone. Both have to be dealt with, and on a listed Maldon house the interior conversation usually starts before the extension conversation does. Our guide to listed buildings and extensions works through how the two run together.

Building on a slope

This is what makes a Maldon job different from a Heybridge one on the flat a mile away, and it shows up in four places.

The foundation steps. On sloping ground a strip foundation is not poured at one level. It is stepped down the slope so that every part of it bears on the same competent stratum, with each step overlapping the one below it generously and the height of each step kept modest relative to the thickness of the concrete. Get that overlap wrong and the foundation has a weak plane running straight through it. It is ordinary work, it is more concrete and more time than a flat plot, and it is one of the honest reasons a sloping site costs more.

The ground has to be held back. Cutting into a bank to win a level floor leaves a face, and a face has to be retained. A retaining structure is designed for the lateral pressure of the soil behind it plus whatever surcharge sits above, a driveway, a neighbour’s garden, a wall, and it needs drainage behind it so that water pressure does not build up and push it over. Above a certain retained height a garden wall stops being a garden wall and becomes a structure with calculations attached. This is where a sloping-site quote either has an engineer’s figure in it or does not.

The neighbour is above you or below you. The Party Wall etc. Act 1996 has two excavation triggers, and on a slope the second one earns its keep. Notice is required for excavation within three metres of an adjoining structure to a depth below its foundations, and separately for excavation within six metres where the work would cut a line drawn downwards at 45 degrees from the bottom of the neighbour’s foundation. On level ground the six metre limb rarely bites. On a Maldon hillside, where your neighbour’s footings may already be well above your new floor level, it bites often. Our guide to the Party Wall Act sets out which section applies and how long the notice periods run.

Water runs downhill, and drains do not run up it. Where the new room is lower than the existing drainage, or the connection is uphill, gravity stops being available and the answer is a pumped system with a chamber, a rising main and a power supply. That is a real cost, a real maintenance obligation and a genuine design decision, and it belongs in the conversation before the floor level is fixed rather than after.

Hythe Quay, and the half of the town that is dry

Maldon gives you two completely different flood answers within half a mile, and the difference is height above the water.

The low ground by the Hythe, along the Promenade and by the Chelmer at Fullbridge sits in the tidal flood plain. The town centre on the ridge above it does not, and that is the whole reason the town is where it is: a defensible dry spur beside a navigable tidal river.

For a householder that means the flood question here is answered by address rather than by town, and the two answers are far apart. On the hill it is usually a short conversation. Down at the water, a property in flood zone 2 or 3 needs a site specific flood risk assessment with its planning application. Householder development is exempt from the sequential test, because the house is already there and there is nowhere to steer it to, and the assessment is a proportionate document that settles the finished floor level, whether construction below a stated level needs to be flood resilient, and how people get out. Setting a new floor higher than the existing one puts a step inside the house, so it gets designed rather than discovered. Our guide to flood zones and extensions in Essex goes through it.

What is under a Saxon town

Maldon was a fortified burh before it was a market town, and the ground in the historic core is treated accordingly.

The town was established as a defended settlement in the early tenth century and the Battle of Maldon was fought here in 991. That depth of occupation means the historic core is archaeologically sensitive ground, and an application involving significant excavation inside it can attract a condition requiring an evaluation or a watching brief during the dig.

For a modest rear extension on a house outside the core this rarely arises. Where it does, the outcome is normally a condition and a programme rather than a refusal, and a condition discharged before work begins costs a fraction of one discovered when the digger is already standing in the hole. It is a question worth asking at the start, particularly on the older streets.

The stock, and what people build

Solid walls above, cavity walls below, and a different brief on each.

The old town is Georgian and Victorian brick with timber framing behind a good deal of it, and terraces running down the slopes off the ridge. Those houses have solid walls rather than cavities, so there is nothing to tie a new cavity into and the junction has to be detailed properly, and any internal insulation has to be thought about for condensation risk rather than simply stuck on. Gardens are long and narrow, often with a rear outrigger, which is why the wrap around is one of the two shapes that keep coming up here. The other is the side return, filling the gap beside that outrigger.

Further out, the interwar and post-war housing on the western side of the town and the later estates towards the edges behave like estate housing anywhere: cavity walls, side access, trussed roofs from the 1960s onwards, and permitted development frequently available where the property is outside the designation.

Across both, the recurring jobs are a rear extension to open up a kitchen and a loft conversion. On the slope-side plots there is also a split level rear extension that steps down into the garden and gains a decent ceiling height doing it. That last one is the shape Maldon does well and most towns cannot.

Questions we get asked in Maldon

Our house is not on the High Street. Are we still in the conservation area?

Quite possibly. The designation goes back to 1969 and covers a good deal more than the shopping street, in more than one part. The council’s current mapping against your address is the only reliable answer.

Can I take down the old garden wall to get access?

Not without checking first. In a conservation area, demolishing a wall above one metre where it abuts a highway, waterway or public open space, or two metres elsewhere, needs permission, and doing it without is an offence. If the wall is also retaining ground, that is a structural question on top.

We are listed. Does that mean no permitted development?

No. Listing adds a second consent covering the interior as well as the exterior. It does not remove the rights that cover extensions and roof work. Both have to be satisfied, and the listed building consent is usually the longer road.

Why is a sloping plot dearer to build on?

More concrete in a stepped foundation, ground that has to be retained and drained, more excavation and spoil to take away, and often a pumped drainage connection. None of it is exotic. All of it is real, and it should be in the price rather than in a variation.

Getting a price for a Maldon extension

We are based at West Bergholt and Maldon is a run we make regularly. The parish immediately over the river is flat, modern and governed by an entirely different set of conditions, and you can read about it in extensions in Heybridge.

Our team comes out and looks at the fall across the plot, the ground, the walls and what they are holding back, the drainage levels, the access for deliveries, the flood position and where the conservation and listing boundaries fall, then says what the job depends on before saying what it costs. Most people who call us already have drawings and permission and want a builder to price the work and build it. That is the ordinary job here, and we are glad to work to somebody else’s plans. Where the drawings do not exist yet, we bring in the technician who draws it and the structural engineer we work with, we handle the planning route with Maldon District Council, we notify Building Control, and we run the job as main contractor.

We carry £2m public liability cover and build to current Building Regulations, through to the completion certificate. The survey and the quotation cost nothing.