Site clearance for construction

Foundations cannot go in until the trees are out. The groundworks crew cannot start until the vegetation is gone. Site clearance is the first physical work on any construction programme. If it runs late, everything after it slips.

Here is what the job actually involves. Not the textbook definition. The practical sequence from someone who is on the ground.

What site clearance actually means

It is not one job. It is a sequence of jobs, each dependent on the last.

First, we take out the trees. This means Category U and Category C trees. Dead wood, dangerous wood, and trees sitting where the building footprint will be. Near boundaries, we dismantle them in sections. In open areas, we fell them where it is safe.

Next come the stumps. Every felled tree leaves one behind. Stumps interfere with foundation trenches, access routes, and drainage runs. We grind each one out well below ground level so the excavators do not hit them.

Then we clear the undergrowth. This is the scrub, brambles, overgrown hedges, and self-seeded saplings. All of it gets cut back to bare soil.

Finally, the waste. Everything gets chipped, stacked, and removed from site. The ground is left clean and ready for the next trade to move in.

Four stages. That order. Every time.

What affects the programme

Site size is the obvious factor. A half-acre plot clears faster than a five-acre one. The variables that actually cause delays are less obvious.

Access is the big one. Can we get a tracked chipper and a truck to the trees? If not, everything gets carried out by hand. That can triple the time on a single site.

What is growing on it. A field of brambles is an afternoon job with a flail attachment. A mature oak with an 18-inch trunk next to a building is a full day's sectional dismantle. The vegetation mix defines the plant and the team we send.

What is underneath. Underground services change the entire approach. Gas mains, water pipes, electric cables. Before we cut anything near known service lines, we need to see the plans. Close to services, it is often manual work instead of machinery. Slower and more costly, but non-negotiable.

Protected species. Nesting birds mean no tree work between March and August. Bats require a licensed surveyor's report. Great crested newts, badgers, reptiles. Any of them can pause the job for weeks while surveys are done or licences are secured. Your ecology report tells us which constraints apply and when.

Weather. Wet ground can stop tracked machinery from accessing the site. Frozen ground makes stump grinding harder and slower. We plan for winter contingencies, but the programme always needs more float.

Domestic versus commercial clearance

A domestic job might be a single garden with a few trees and an overgrown hedge. One truck, two men, done in a morning.

Commercial site clearance involves more. Here is what changes.

Insurance requirements. Commercial sites typically require £10 million public liability cover. Most domestic policies are £5 million. If your site specification asks for £10 million, confirm it before booking. We carry it.

Paperwork. Every commercial job needs a site-specific risk assessment and method statement (RAMS) before we mobilise. The RAMS document covers access routes, plant positioning, overhead cables, underground services, neighbouring properties, traffic management, and waste disposal. It is written for your site, not a generic template.

Traffic management. If the site fronts onto or adjoins a live road, you may need Chapter 8 compliant traffic management. Lane closures, banksmen, temporary signage. This has a lead time and a cost. We can coordinate it, but the programme needs to account for it.

Waste handling. Domestic green waste goes in a truck. Commercial waste requires a waste transfer note. Contaminated or treated timber goes to a different facility than clean green waste. We manage all of this. You do not need to arrange anything, but you should know the paperwork trail exists for your records.

What we need before we arrive

Scale site plans. Drawings showing boundaries, existing structures, service locations, and the specific areas marked for clearance.

Service drawings. Gas, water, electric, fibre. Every underground line on site. If you do not have them, we work to standard safe assumptions and proceed with extra caution. That caution takes time.

Ecology reports. Send us your bat survey, great crested newt survey, or breeding bird survey if they exist. They dictate what we can and cannot do, and the specific windows when we can do it.

TPO or Conservation Area documents. If any tree on site has a Tree Preservation Order or is within a Conservation Area, we need the consent paperwork before we touch it. Working on a protected tree without consent is a criminal offence. We cannot do it.

Your programme dates. When does the groundworks crew start? When do foundations need to be in? We schedule backwards from that date. The earlier we are involved, the more likely we can secure the slot you need.

How we price the job

Every site is different. We quote from a site visit, not from drawings. A flat site with good access and a dozen small trees is priced differently to a steep slope with mature oaks next to overhead lines.

Guide prices do not work for this trade. Too many variables. What you get is a fixed price after we have walked the ground. No hidden extras. The number we quote is the number you pay.

See also: After the BS5837 tree survey: what happens next — how we work from your survey report. And what site managers need to know about commercial tree surgery.