Groundwork & Foundations

Before any building can begin, groundwork in order. This refers to not only the foundations of your build, but also tree removal, drainage, and even the paths and patios attached to your extension.

Groundworks are a vital starting point for any newbuild, extension or outbuilding repurposing project

A groundworker is a uniquely British term and refers to the professional that specialises in this form of construction. It’s common for groundworkers to be brought on as subcontractors by your main builder, in order to carry out work before the build, and after it is completed.

Whether hiring your own, or going on your builder’s recommendation, you’ll want to vet any groundworker hired onto your project. If hiring your own, make sure you get in touch with previous clients for reviews, and get quotes from three separate professionals.

Make sure you ask for their opinions on…

Ground heave, your architect should have flagged if this will be an issue for your home, and it’s a red flag if a groundworker doesn’t understand this subject.
How a drain test might be carried out. Do they intend to simply throw water down there? Again, this is a red flag. A good professional will undertake an air test, whereby all the pipes are closed off and air in blown into the system to find any leaks. They might also undertake a seal test, where the pipes are sealed off and water fills the system to find leaks. If neither of these tests are mentioned, stay clear.
How will work be carried out? You’ll want to establish consistent working hours, and discuss how waste and materials will travel through your property.

Site clearing

One of the first steps in your extension, site clearing helps remove early obstacles to your construction. Your groundworker will remove all unnecessary masonry and soil from site, allowing the next stage to commence, as well as dealing with any waste. This waste might include undergrowth, or even trees, and you’ll need to make sure any tree being removed has been assessed for TPO – that’s a Tree Protection Order, a scheme put in place to protect trees of significance. This should have been covered in the planning process, but if the council hasn’t been consulted, you’ll need to do this before site clearing goes ahead.

Foundations

Your foundations lay the important first step for your extension, and you’ll need to make sure they’re being laid out in accordance with your approved drawings from your architect.

Once your foundations have been mapped out and assessed, there are two options for how they might be achieved.

Trench fill foundation

Trench fill foundations are the preferred method for most homes, as they don’t require bricks to be laid below ground. By simply pouring concrete to within 150mm of the surface ground level, the project can get moving quickly – saving time and money.

This foundation type is ideal for home on clay and chalk soils, but might not be an option is you live on unstable ground.

Strip foundations

These tend to be wider than their trench counterparts, using less concrete on the base layer. They’re ideal for homes on softer soils, such as sand, because the weight of the load is spread out over a larger surface area.

Drains

Your groundworker will be responsible for the drainage of your property, and it’s important for this to be right first time, as fixing pipes post-construction can be tricky – not to mention expensive!

The first thing your professional will look at is the position of the drains. They’ll establish where your existing drains fall, and if you’re building a new home from scratch, look into connecting you into the main system.

They’ll then move into the installation, whereby pipes will be positioned in respect to both the layout of your home and the gradient and bends present. Once this is completed, then your pipes will be tested for leaks. As we mentioned above, you’ll either want this carried out by either an air or seal test.

Costs

Prices vary but if you include digger/dumper hire it can easily be £350 per day.

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Horley by area

Although Horley does not have named-on-road-sign neighbourhoods—like Crawley does—the following areas are commonly referred to:

01. Hookwood/Povey Cross

Hookwood/Povey Cross →
Hookwood and Povey Cross are on the western outskirts of Horley. Many international hotels are situated here as is Tesco Hookwood. Several large housing developments are planned here. Hookwood and Povey Cross are directly beside the airport.

02. Gardens Estate

Gardens Estate →
Gardens Estate is very close to Gatwick airport and those working at LGW can easily access the terminal building via footpaths from the recreational area, Riverside Garden Park via the underpass of Gatwick airport station.

03. Haroldslea

Haroldslea →
This area comprises: The Balcombe Road (B2036) and the roads leading from it between Oakwood School and the A23/M23 link road flyover. For example, Limes Avenue which was originally laid out in 1936 and still retains some of the Lime trees planted at that time.

04. Court Lodge

Court Lodge →
This neighbourhood was set out in the 1950s and 1960s. It has a mixture of flats and houses. It is home to Horley leisure centre, several airport hotels and a couple of places of worship.

05. Horley Central

Horley Central →
This area includes the town centre which has quite a lot of purpose built residential flats and roads such as Church Road, Massetts Road, Pine Gardens, Ringley Avenue and, Russells Crescent.

06. Langshott

Langshott →
This area of Horley stretches eastward towards Smallfield. Immediately to its north is the new estate called The Acres. This area is home to Langshott Manor, which was built in 1580; it is now a luxury hotel.

07. Meath Green

Meath Green →
Once upon a time this area was called Moy Grene, and it has some of Horley’s oldest homes. Today, the vast majority of the homes in this area where built from the late 1950s onwards.

08. The Acres

The Acres →
This new neighbourhood of over 700 homes is in the north east of Horley and Langshott. The development was built mostly by Barratt and Bovis Homes between 2010 and 2016.

09. West Vale Park

West Vale Park →
This new neighbourhood is to the north west of Horley and joins onto Meath Green. To date, around 1,600 new homes have been constructed:
• Crest Nicholson brochure →
• Fabrica brochure →
• Taylor Wimpey brochure →

10. Gatwick

Explore Gatwick→
Gatwick airport is included as an area of Horley because historically it was part of Horley and, it remains adjacent to this day. Gatwick, before becoming a major international airport, was a famous horse racetrack which hosted the Grand National on several occasions.