Select Page

Knowing the Cost of Removing Drains for an Extension

This article will provide you helpful information about removing drains for an extension, including the cost, materials, labor and turnaround time of this home improvement project.

Drainage alteration is often inevitable when building an extension to your house. The change in the drainage system is imperative when expanding a building to keep water smoothly flowing.

Project Basic

If the extension you are planning will be on top of a manhole cover, it entails either one of these two major modifications; moving the drain or creating new access. Both jobs are acceptable to the local water authority and it will not require you of any building permits. 

To avoid any pitfalls concerning an underground drainage project, making a plan of how a new drainage system will work is very important. There are several important things to consider when creating an underground drainage plan, below are the following:

  1. Check with the builders. Know if they already have the references they need to use when creating the drainage plan. Hiring a surveyor can be more costly since they will be creating the plan from scratch requiring them to go beneath your house.
  2. When using old plans, your builders need to be careful. The original plan could have been changed since those were created. Reason? Before the extension project, other building alterations could have taken place.
  3. It will cost you more if you hire a surveyor. However, their services will give you correct and current information on your drainage system.
  4. Lifting the manhole covers to see the layout of your drains and create your plan is possible. It is a cheaper option but more time-consuming. If you think that you have the skills and confidence to do the job alone, it’s not bad to give it a try.

Ready to get a quote from local tradespeople?

Types of Underground Drainage

It is never an easy task to make changes to your underground drainage. There are a lot of things that you need to learn. Plus, you need strength, manpower, tools and equipment to work on the project. There are two main types of underground drainage. These are:

  1.     Surface Water Drainage – This includes the pipes, gutters and drains that carry rainwater into the nearest canal or river.
  2.     Foul Water Drainage – This is the type of drain that takes the water from your sinks, bath, washing machine, toilet and shower to the nearest sewer.

New Category of a Drainage System

  • Grey Water System – This is a new drain category being used today. This system separates toilet waste from the water from baths, sinks and appliances. The toilet waste will be collected and directed in the tanks where it can be filtered and pumped to storage tanks. The water will be used in watering the garden or for flushing toilets which clean water isn’t strictly required. Greywater systems give several benefits. One, it reduces the consumption of expensive drinking water when not needed. It also reduces flood risk by reducing the amount of water that drainage systems have to cope during this unwanted occurrence. In the UK, the greywater system is still rarely used.

Moving a drain requires the help of a professional. Although not in all cases, the services of an experienced tradesman can assure you that there will be no issues that can be more costly when a repair is needed.

Moreover, not all drainage system works need building permission. Building Regulations Part H of Schedule 1 should be referred to when you seek to hire a building inspector. The person will visit and carry out an inspection and check if your project meets the current regulations.

Gutters and Drainpipes Modification

Modifying gutters and drainpipes are simpler. To do this, a contractor will find the same make of drainage system to the one currently being used. The procedure makes it easier to link the new pieces to the existing pieces. Consequently, the drains will look better than using a new and completely different type of drainage system.

Underground Drain Modification

This is a more difficult and costly project. It is more complicated to make sure that all drains run downhill at a slight angle. However, this is an important procedure to avoid overflowing drains and nasty smells or blockages.

Drainage systems must be cleared by any potential blockages. Locating inspection chambers at junctions and bends in the drainage system should be performed by a professional.

Allowing the air into the system, these inspection channels are crucial to replace the water as it drains. Get expert assistance if your drainage project needs new major junctions and inspection chambers.

Hiring the Right Drainage Contractor

A drainage work can be done fast and less costly if you hire a reliable drainage contractor in the beginning. Today, people who offer their services on this kind of project is everywhere. Some may just knock on your door and talk about their company.

Be careful when making your choice. Spend your hard-earned money to someone who can give you reliable and trustworthy services. To give you some tips, here are the characteristics of a good drainage contractor:

  •         Licensed
  •         Certified
  •         Experienced
  •         Recommended

When shopping around for the right contractor, asking people you trust can be a great option. The word of mouth works most of the time especially if the referral comes from a loved one, relative, friend or officemate.

Also, check if the tradesman has its website. Check their company online and learn more about their services before scheduling an initial meeting. Work with a contractor whom you are comfortable with. That would make a difference when wanting to achieve your goal. On the contrary, hiring the wrong person can lead to problems and more costly undertakings.

How Much Does Removing Drain for an Extension

Drain removal costs approximately £250. That is for getting a correct survey. The smaller the change, the faster the survey. The larger the project, the survey could take longer. Materials for this kind of project depends on how much change is required for the drains involved. Several factors affect the cost.

Type and quality of piping. A basic pipe can be as little as £5 for 1 meter. For high quality or specific type of piping, the price starts at £30. The cost can still go lower. The labor cost is round £250 per day.

Work is expected to be complete in 1-3 days that gives you roughly £500 additional expenses. But, the work could take longer if the drainage system is more complicated.

Given all the changes and work needed to be done, a drainage modification may cost around £1000.