WHERE THE WATER GOES

House Extensions in Goole

Add a roof to the back of a house and you have created rainwater that used to land on grass. On the low, flat ground around Goole, deciding where that water goes is a real design question rather than a note on a drawing, and it is often what an extension turns on.

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Surface Water

flat ground changes the drainage answer.

Building regulations set an order of preference for getting rid of rainwater. Into the ground first, to a watercourse second, and to a sewer only where the first two are not workable. On free draining ground in a hilly town that hierarchy is barely noticed. On low, level ground where the water table can sit high, a soakaway may not perform, and a percolation test is the honest way to find out rather than assuming it will be fine because the neighbour has one.

The consequence for an extension is practical. If the surface water has to go to a sewer, the connection has to be agreed and the existing system has to have the capacity to take it. That may mean attenuation, a larger storage element or reworking the rainwater layout of the whole rear of the house. Every one of those is a cost, and every one of them belongs in the quote at the start.

The paved area outside the new doors matters too, and it is usually forgotten. A large impermeable patio laid across the back of the house adds more run-off than the extension roof does, and on ground that already struggles to take water that is the difference between a garden that drains and one that does not. It is designed at the same time, with permeable construction or its own outfall.

None of this is exotic. It is simply the part of an extension that is decided underground, where nobody looks until a groundworker is standing in a trench with a question.

  • Existing drainage traced and recorded before the design is fixed
  • Percolation testing where a soakaway is proposed
  • Attenuation and storage designed where discharge has to be limited
  • Rainwater layout for the extended house rather than for the new part alone

Our Process

how we work.

01

Site Visit

We measure the house, lift covers where we can, and establish how the existing drainage actually runs.

02

Water Strategy

Surface water disposal and the position of any shared or public drain settled early.

03

Design

The extension shaped around what the plot, the drainage and the budget will genuinely support.

04

Agreements

Build over or build near agreement with the water authority where a public sewer is involved.

05

Approvals

Permitted development or a full application to East Riding of Yorkshire Council, plus building regulations.

06

Build

Groundworks through to handover, by the practice that designed it, at the quoted price.

Goole

new roof, new water, somewhere to put it.

A soakaway needs ground that will take water and a water table low enough to accept it. Where neither is guaranteed, the disposal strategy has to be agreed before the footprint is fixed, not after.

Planning authority: East Riding of Yorkshire Council

Public Sewers

building over the drain in your garden.

A good number of gardens have a drain crossing them that is no longer the householder's responsibility. Since the transfer of private sewers, many shared drains and lateral drains became the water authority's, which means an extension built over or close to one needs a build over or build near agreement rather than a decision by your builder. Yorkshire Water covers most of this region and the process is straightforward when the survey happens first.

What makes it difficult is timing. A manhole discovered in the middle of a foundation trench turns into a redesign, an application and a stopped site. Found on a drawing, the same manhole is either designed around, protected with a suitable foundation arrangement, or the chamber is relocated as a planned item. The cost difference between those two outcomes is significant, and it is entirely a matter of when the question was asked.

  • Drainage survey and manhole location before the footprint is agreed
  • Build over and build near applications to the water authority
  • Foundation design adapted where a sewer runs close to the excavation
  • Chamber relocation or diversion designed as a planned element
  • Building control drainage details and inspection coordinated with the works
building over the drain in your garden. - The Yorkshire Architect

The Extension

what the housing here will take.

Goole has a lot of terraced and semi-detached property in the older parts of town and estate housing around the edges, which gives the extension conversation two shapes. On a terrace, the useful gain usually comes from the side return and the rear together, because that is what turns a narrow plan with a dark middle into one wide room. On the estates, gardens are the limiting factor and a two storey or over-garage addition often gives more for the money than another few metres of ground floor.

Whatever the form, the same three things decide whether it feels worth it afterwards. Daylight into the middle of a deepened plan, a level threshold between old and new that was designed rather than improvised, and heating that has been reassessed for the larger volume instead of being asked to stretch.

  • Single storey rear extensions and side return infills
  • Wrap-arounds on terraced and semi-detached property
  • Two storey and over-garage additions on the later housing
  • Level thresholds and floor build-ups resolved between old and new
  • Heating, ventilation and glazing reassessed for the extended house
what the housing here will take. - The Yorkshire Architect

Recent Work

projects near goole.

House Extensions by The Yorkshire ArchitectHouse Extensions by The Yorkshire ArchitectHouse Extensions by The Yorkshire ArchitectHouse Extensions by The Yorkshire Architect

Questions

house extensions in goole, answered.

Which council decides an extension application in Goole?

East Riding of Yorkshire Council. They handle householder and full applications for Goole and the villages around it. Building regulations are a separate approval and can go either to the council's building control team or to an approved inspector.

Why is surface water such an issue on flat ground?

Because a soakaway only works if the ground will absorb water and the water table is low enough to let it. On low lying, level ground neither can be assumed, so the disposal route has to be established by testing rather than by copying what the neighbours have.

What is a build over agreement?

It is consent from the water authority to build over or close to a public sewer or a lateral drain. It covers how the foundation protects the pipe, whether access is maintained and what happens if the pipe needs work later. It is normally straightforward when applied for during design.

How do I know whether the drain in my garden is public?

A drainage survey and the water authority's records will tell you. Since private sewers transferred, many drains that householders assumed were theirs are now the authority's, particularly anything shared with a neighbouring property. It is worth confirming rather than assuming, because the difference decides the process.

What happens if a manhole turns up in the foundation trench?

The work stops while the position is resolved, which usually means an agreement application, sometimes a redesign of the footprint and often a delay of weeks. That is the argument for a drainage survey at design stage, where the same problem costs a small fee and an afternoon.

Do I need planning permission for a rear extension in Goole?

Not always. Many single storey rear extensions fall within householder permitted development, subject to limits on depth, height and how much of the garden is built on. Rights are reduced in conservation areas, absent on flats, and can be removed by an Article 4 direction or a condition on the original permission.

Are foundations more expensive on this kind of ground?

They can be. Depth depends on the soil, on the water table and on any trees near the excavation, and where a stable bearing is deeper the trench costs more to fill. Building control inspects the excavation before concrete goes in, and that inspection sets the depth in practice.

Will I need a party wall agreement with my neighbour?

If the work cuts into a shared wall, is built up to the boundary line, or involves excavation close to a neighbour's foundations, the Party Wall etc. Act 1996 requires notice. Many neighbours consent in writing. The notice periods run into weeks, so it is served at design stage rather than when the digger is booked.

Can I have bifold doors across the back of a terraced house?

Usually yes. The opening needs a beam sized by an engineer with proper bearings, and the glazing area has to be balanced elsewhere in the fabric for Part L compliance. On a terrace the more interesting question is often how much daylight reaches the middle of the plan once the rear wall has moved.

Do you work in the villages around Goole?

Yes. Airmyn, Rawcliffe, Snaith and the villages towards Howden are within our area, and they fall to the same authority. Just across the boundary the position changes, with Selby decided by North Yorkshire Council and Doncaster by City of Doncaster Council, so we check rather than assume.

Do you design and build, or just draw it?

Both. The architect who designs the extension oversees the build, so the drainage strategy that was drawn is the one that gets installed, and the price quoted at the outset is the one we stick to.

settle the drainage, then design.

A free consultation in Goole, a survey that finds the drains before the digger does, and a price that already includes what the ground needs.

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