Septic Tank Installation Cost

By Kane
Last updated 25th April 2024 - Reading time: 6 mins
At a glance
  • The average cost of installing a septic tank is around £1,200
  • The job will take approximately 2 - 7 days to complete
In this article, you'll discover the following:
  • A complete pricing breakdown which includes what you need to consider before installation, along with what such a task usually involves
  • How long the job should approximately take and a general overview of what kind of jobs can be performed
  • How to find and hire a septic tank specialist

Want to discover the cost of fitting a septic tank system?

On average, you can expect to pay around £1,200 to complete such an undertaking.

This guide covers everything you need to know about the cost of septic tank installation.

Get a quote today from a septic tank specialist to install your septic tank!

Want to find out about costs first?

Take a look at our price guide below...

septic tanks

Average Cost of Installing a Septic TankL

Depending on the complexity of the job and size of the tank, it usually takes 2-7 days

£1200

How Much Does a Septic Tank Cost?

The average material cost for installing a medium septic tank would typically cost around £800, whereas a large tank could cost anywhere up to £1,200. A septic tank specialist will usually charge anywhere between £150 and £250 per day for installing your septic tank.

Installing a septic tank is popular in rural areas as often they don't have a mains sewage where water waste can go. Not only are septic tanks extremely useful for people in rural areas, but by installing a septic tank it will remove “grey water” from your sink, shower, dishwasher etc.

You will need to make sure you get planning permission as well as building regulations approval for installing your septic tank.

You should apply for this and make sure you have approval before getting quotes from professionals for the job.

You should hire a professional septic tank specialist to install your septic tank as they will do the job efficiently without making mistakes. It is recommended to compare a few quotes from builders so you will get the best price for installing a septic tank.

My Job quote have a network of highly skilled and qualified builders who have a wealth of knowledge on installing septic tanks. By comparing up to 3 reliable quotes you can make sure you’re getting a good deal on your septic tank.

I have just had my septic tank emptied 3 weeks ago but it's now full again and the small manhole below is full as well. Now it's starting to leak into the garden. Why is my septic tank leaking?

"Hi. Sounds as if you’ve a blockage and / or the system is overwhelmed. Maybe best to get the drains jetted / rodded out. Thanks, Rob"

Septic Tank Installation Prices

Job DescriptionDurationMaterial CostLabour Cost
Installing a small septic tank2-4 days£800£150-£250 per day
Installing a medium septic tank3-5 days£1,000£150-£250 per day
Installing a large septic tank5-7 days£1,200£150-£250 per day
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Things to Consider When Installing a Septic Tank

You will first need to consider what size septic tank you need. It will obviously be a cheaper cost if you install a smaller tank, but you need to keep in mind that you will have to empty out the tank more often if you choose a small tank over a larger one.

You will have to factor in not only the cost of the septic tank, which will vary depending on the size you choose, but you will have to factor in any work you’ll have to pay for to fit the tank. The labourer will need to dig underground if your septic tank is going underground. You will also need a drainage system if the septic tank is to be installed below ground.

If you’re looking for a cheap price for installing a septic tank, you should consider having your septic tank fitted above ground instead of below ground as there are much fewer labour costs as they won’t need to carry out excavation for the tank.

It should be noted that septic tanks will have to be emptied at least once a year, so if you install a septic tank that is too small, you will have to factor in the effort it will take to empty the septic tank more often. It could be worth paying a bit more for a large septic tank to avoid having to frequently empty your septic tank.

You should also consider that any septic tank that has been installed since 2015 will need to have planning permission and building regulations approval.

You will also have to factor in the cost of the labourer’s daily rate for installing a septic tank. A septic tank specialist will usually charge between £150 and £250 per day to install your septic tank.

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Doing it Yourself

Many people think they can install their septic tank themselves to bring down the cost of installing a septic tank, but it should only be attempted if you have carried out work of this nature before. You will need to get approval and planning permission before you can even attempt to install your septic tank.

You will also have to think about digging into the ground if your septic tank is going to be fitted underground. You would have to hire a digger to do this yourself which would cost money and take up a lot of time if you’re unsure what you’re doing.

You will need to consider that an underground septic tank will need drainage works carried out which will require planning permission. It’s advised to leave all the tricky jobs to the professional. To get the best price for installing your septic tank, you should compare up to 3 quotes from septic tank specialists.

You should hire a septic tank specialist to install your septic tank as they will have the essential skills and experience to do the job to a high standard. If you’re not experienced in installing septic tanks or carrying out the digging work to fit the tank, you could run the risk of making a mistake.

A professional builder will save you time and money on installing your septic tank in an efficient and swift manner. My Job Quote will put you in touch with reliable and trusted septic tank specialists.

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