Quantified, defensible tree risk assessment — combining professional arboricultural expertise with GPS-recorded tree positions and aerial inspection. So you see your trees as data you can act on.
The same standards apply whether you own one tree or a whole landscape: assess it properly, quantify the risk honestly, and recommend only what the evidence supports.
VALID, QTRA and THREATS assessment — choosing the right method for the site, from highway corridors to private gardens. Proportionate, evidenced recommendations that stand up to scrutiny — not blanket felling lists.
VALID · QTRA · THREATS · PTICAA-certified drone survey bringing the camera to the crown. High-resolution inspection of upper limbs, unions and deadwood that simply cannot be seen properly from the ground — without climbing, and without closing a road.
CAA A2 CofC · Insured · 4KHands-on aerial inspection where close contact is the only way to be certain, including endoscope inspection of cavities for potential bat roost features.
Climbing · Endoscope · PRFTree constraints, arboricultural impact assessment and method statements — delivered as clear, geo-referenced data your design team can work with.
BS 5837:2012 · RPA · AMSRoadside inspection delivered under Chapter 8 traffic management with full highways accreditation and FISA-compliant safe systems of work. Aerial inspection means less time spent in live lanes.
Chapter 8 · FISAParkland, veteran and woodland stock assessed within usage-zoned, proportionate inspection regimes — with data that supports long-term management.
Zoned surveys · GISWorried about a tree near your house? A straightforward, independent assessment of whether there is a real problem — and if there isn't, we'll tell you that too.
Advice · Inspection · ReportsReports for lenders, insurers and loss adjusters where trees are implicated in subsidence or a purchase is held up pending arboricultural assessment. Prompt turnaround.
Lenders · Insurers · PurchaseApplications, notifications and supporting statements for protected trees — prepared to give your local authority what it needs to say yes.
TPO · CA · s.211| DBH | 118 cm |
| Height | 24 m |
| Condition | Fair |
| Risk of harm | 1 / 640,000 |
| DBH | 74 cm |
| Height | 19 m |
| Condition | Poor · dieback |
| Risk of harm | 1 / 8,200 |
| DBH | 96 cm |
| Height | 27 m |
| Condition | Good |
| Risk of harm | 1 / 1,900,000 |
Hover the markers for an illustration of what a survey record contains. Not a PDF that ages in a drawer — a mapped, photographed, quantified account of your tree stock, with every recommendation traceable to a measured assessment.
Figures shown are illustrative examples, not data from a live site.
Every tree is recorded digitally on site, with its position and photographs, never written up later from notes. Your report arrives sooner and stays consistent from the first tree to the last.
Each tree is logged with its GPS position and photographs, so you and your contractor can find it again on site.
GPS · PhotographsTrees are marked on your own site plan, or on a clear base map if you don't have one.
Tree plan · Your drawingRecommended works are listed by priority, with site constraints noted, so your contractor can quote from it directly.
Priorities · ConstraintsVALID, THREATS and QTRA, chosen to suit the site and the decision you need to make.
VALID · THREATS · QTRAEvery visit starts with a site safety check, and RAMS come with every job.
Site check · RAMSBat roost assessments, decay testing and other specialist inputs are brought together in a single report.
Bats · Decay · SpecialistsRoadside corridor surveys under Chapter 8 traffic management, with full highways accreditation.
Parkland, veteran and roadside stock assessed within usage-zoned, proportionate regimes.
Defensible inspection programmes, prioritised works schedules and claims-ready records.
BS 5837:2012 constraints, impact assessment and method statements for design teams.
Independent advice on trees near your property, plus mortgage and subsidence reports.
Mark Johnson came to arboriculture as a deliberate choice rather than an accident — asking what he genuinely wanted to spend his working life doing, and rebuilding around the answer. That same question shapes how The Tree Surveying Company works: adopt the tools that make surveys better, ignore the ones that don't, and never write a recommendation you couldn't defend in person.