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Extension Drain Removal Costs

If you plan on fitting an extension, it is inevitable to get the drainage altered. You’ll need to ensure that the execution and planning of the modification to the drains is carried out right as well. If the extension is going to be right over a manhole cover, arrangements need to be made to ensure that your drains are accessed easily even after completing the extension installation.

This usually involves getting the drains moved or even just getting access created— provided that it’s acceptable to your water authority in your locality.

Planning Matters

If you want to avoid unnecessary pitfalls concerning your underground drainage, laying out the necessary plans is important. You can start by checking first with your council to find out if they still have house plans that can then be used as reference.

This is a more cost-effective method than having to get the services of a surveyor to come up a detailed plan of those drains located underneath your home from scratch. Be cautious when using older plans. Things could easily have been altered from the time of the creation of these plans due to alterations and other related projects. Hiring a professional surveyor is expensive but will at least give you the right information pertaining to the current drainage system.

Generally, going the cheaper option requires more time as it involves getting the manhole covers lifted and then work out the drainage system layout so you can draw the plan. Unfortunately, if you aren’t confident that you can execute this accurately, you’re better off hiring the professionals even when they will cost you more.

Making alterations to a drainage underground will not be easy. There are typically two kinds of system for underground drainage— foul water drainage and drainage for surface water. Drainage for surface water includes pipes, drains and gutters that will carry the rainwater into the river or a canal.

The drainage for foul water, on the other hand, will take water from the washing machine sinks, shower, toiler, and bath to the sewers. These systems are kept separate completely although it is quite acceptable to let surface water to run to the drainage system for foul water— but certainly not the other way around.

Nowadays, there’s a third category which is greywater. This system is meant to keep used water collected from sinks, baths and appliances separated from the rest of the toilet water. It then gets collected in tanks so it gets filtered and then pumped to tanks that can store water that can then be used in the house where strictly clean water isn’t really necessary. For instance, for flushing the toilets and watering your garden.

The system is ideal towards reducing consumption of costly drinking water supply for those tasks that do not really require it. It also reduces the volume of water that has to be processed by drainage systems. This helps decrease the risk of floods. These systems are still not that widely used in the UK, however.

If there is a need to get a drain relocated, make sure that the plan is carried out as thoroughly as possible. you’ll also need to find out if there is a need to secure permission although, this would depend on the specific project involved. Getting professional advice is always necessary to avoid unnecessary and potentially costly mistakes.

DIY Possibilities

If you intend to DIY the whole thing, make sure to refer to the Building Regulations first— specifically, Part H, Schedule 1. This is because an inspector will likely visit the location for an inspection so they are sure that current regulations and rules are successfully met.

It is usually simple to get drainpipes and gutters modified. You just need to make sure that a drainage system that’s of the same make as the existing one is used. This will make it easier to get new pieces linked to the rest of the pieces that already exist in the system. It will look better too.

However, getting the underground drains modified can get complicated so never ignore the rules when doing so.

For instance, drains need to run downhill a bit of an angle to ensure that the drains are not going to overflow and to prevent nasty smells and blockages.

The other rule is that it;s necessary for the system to easily get unblocked by positioning your inspection at bends and junctions in the system. These channels are also responsible for letting air right into the system— something that is crucial for replacing the water whilst draining. If you require new inspection chambers and major junctions, you can ask the experts for help.

Costs for Extension Drain Removal

The initial costs for getting drains removed from your extension could amount to £250 for the basic scan. The work can take a couple or so days to finish but if the change is considerably smaller, the whole task can get completed in just a day. Larger changes are going to take considerably longer.

The work can require a variety of materials, depending on the specific changes that your drains need. How long the pipes are will be crucial to the overall costs. The quality of the piping matters as well.

Basic pipes can cost as low as £5 for a metre but the top-quality ones could cost £30 a metre. Generally, will be along the lower end of this price range.

Changes could cost about £1000 but more complex work is expected to cost more. Labour cost could come up to £250 a day and the work may take up to 3 days, depending on how difficult the work is. This could bring costs up to £500.

Cost Breakdown

Individual costs for the removal of an extension drain could come up to £1000. Of that, £250 covers the materials and £750 covers the tradesmen fees.

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