Demolition and Site Clearance
Specialist Tree Services for Demolition and Site Clearance Projects Across North London and Hertfordshire
Before the diggers arrive, the trees will need sorting out. That might mean removing them, protecting them, or working out which ones are staying and which ones have to go. If you get it wrong, you might be looking at stop-work notices, fines, and delays that cost far more than the tree work itself.
Thor's Trees works alongside demolition contractors, developers, and project managers to handle the arboricultural side of demolition and site clearance. The team makes sure tree removals are legal, protected trees are properly managed, and the site is ready for the next phase without anything holding up the programme.
What Needs to Happen Before Demolition Starts
Most people think of demolition and site clearance as knocking things down and carting them away. But if there are trees on or near the site, there's a whole layer of planning that needs to happen first, and it catches a lot of projects off guard.
Are any trees protected?
Trees covered by preservation orders or sitting within conservation areas can't be touched without council consent. That includes trees that look half dead, trees growing through old structures, and trees you'd assume nobody cares about. We've seen projects grind to a halt because someone took a chainsaw to a TPO tree without checking first.
Thor's Trees surveys the site, identifies any protections, and handles consent applications before work begins.
Are there nesting birds or bats?
Wildlife legislation doesn't pause for your build programme. If demolition is planned between March and August, a nesting bird check may be needed. Bats can delay things year-round if a roost is found in a tree earmarked for removal. The team carries out ecological checks and advises on timing so you're not caught out by a last-minute survey requirement.
What about the neighbours?
Trees near site boundaries often have roots and canopies
extending into neighbouring land. Demolition vibration and heavy machinery can damage trees that belong to someone else, creating liability issues. Thor's Trees identifies these risks early and puts protection measures in place before the heavy work starts.
Tree Removal for Demolition Sites
When trees need to come down to make way for demolition or construction, the team handles the full process.
Straightforward removals on open ground can usually be completed quickly with minimal fuss. But demolition sites aren't always straightforward. Trees growing through old buildings, wedged between structures, tangled in overhead cables, or sitting on top of underground services all need a more considered approach.
Thor's Trees has the equipment and experience to carry out removals in tight, complex settings. Sectional felling, crane-assisted removals, and careful dismantling keep things safe when there isn't room to fell a tree in one go. The team also handles stump grinding and root removal so the ground is genuinely clear for foundation work and excavation.
All timber is removed from the site. Where possible, usable wood is recycled rather than sent to landfill.
Protecting Trees That Are Staying
Not every tree on a demolition site needs to come down. Retained trees, especially protected ones, need proper safeguarding during the demolition and construction phases.
Thor's Trees installs tree protection fencing to BS5837 standards, keeping root protection areas clear of machinery, materials storage, and foot traffic. The team also advises on ground protection measures where vehicles need to cross within root zones, and monitors tree health throughout the project to catch any damage early.
If the local authority has required a tree protection plan as a planning condition, Thor's Trees prepares the documentation, implements it on site, and provides the evidence needed to satisfy sign-off.
Pre-Demolition Tree Surveys and Reports
Planning authorities expect proper arboricultural documentation before granting permission for demolition. Getting this right at the start saves arguments later.
Thor's Trees provides BS5837 tree surveys that map every tree on and adjacent to the site, categorising them by quality, condition, and retention value. The reports give your design team clear constraints to work with and give the council confidence that trees have been properly considered.
Where trees need to come down, the team prepares the justification, proposes replacement planting where appropriate, and submits consent applications for protected trees. If an arboricultural method statement or tree protection plan is conditioned on your planning approval, the team produces these too.
Having all the paperwork sorted before demolition starts means the contractor can crack on without worrying about compliance issues surfacing halfway through.
Fitting Around Your Programme
Demolition projects run to tight timescales, and tree work that overruns or gets delayed can knock on through the entire programme.
The team at Thor’s Trees are able to coordinate directly with site managers and principal contractors to schedule tree work within the wider demolition programme, whether that's an early enabling works phase or reactive work as the project unfolds. If something unexpected turns up on site, like an unrecorded TPO or a bat roost, the arborists deal with it quickly and keep disruption to a minimum.
For projects that need CDM compliance, the team provides method statements and risk assessments that integrate with your site safety plan.
Frequently asked questions...
Do I need a tree survey before demolition?
In most cases, yes. If there are any trees on or adjacent to the site, the local planning authority will usually expect a BS5837 tree survey as part of the planning application. Even if planning is already in place, a pre-demolition tree assessment helps identify protections, risks, and any consents you'll need before work starts. It's much cheaper than dealing with the fallout of getting it wrong.
Can you remove trees that have preservation orders?
Not without consent. But Thor's Trees can apply for TPO removal consent on your behalf, preparing the case for why the tree needs to go and submitting the application to the council. In many demolition scenarios, removal consent is granted when there's a strong justification and appropriate replacement planting is proposed.
How quickly can you mobilise for demolition site tree work?
For planned projects, the team typically schedules work within the enabling works phase. For urgent or reactive work, Thor's Trees can usually get on site within a few days. Emergency situations are covered by the 24-hour callout service.
What about asbestos or contaminated land near trees?
The arborists are experienced in working on sites with known contamination. They follow appropriate protocols and coordinate with your contamination specialists to make sure tree removal doesn't spread contaminants or create additional risks.
We've already started demolition and found protected trees we didn't know about. Can you help?
Yes, and the sooner the better. The team can carry out an emergency survey, advise on what can and can't be done, and submit urgent consent applications where needed. Stopping work early and getting proper advice is always better than pushing ahead and facing enforcement action.
What if a tree is dangerous and needs to come down immediately?
If a tree poses an immediate risk to people or property, emergency removal can go ahead without the usual consent process. Thor's Trees documents the situation thoroughly to protect you in case the council questions the decision afterwards
Get in touch with Thor's Trees to talk through the tree side of your demolition or site clearance project. The team will make sure nothing gets missed.