A tree survey's price is driven mainly by seven things: how many trees must be recorded, the size and complexity of the site, how accessible the trees are, which report type you need, whether any trees are legally protected, how fast you need it, and where the site is — with UK surveys ranging from around £295 for a small domestic job to £1,500 or more for a full planning package, and several thousand for large sites.
If you have gathered quotes and found them wildly different, it is almost always because they price these factors — and the deliverables — differently. Here is what actually moves the number, so you can compare like for like. For headline figures, see our main tree survey cost guide; for the BS5837-specific breakdown, see how much a BS5837 survey costs.
1. Number of trees
Every relevant tree must be individually recorded: species, height, stem diameter, crown spread in four directions, age class, physiological and structural condition, its BS5837 category (A, B, C or U) and its calculated root protection area. That is time on site and time at the desk, so the tree count is usually the single biggest driver of a BS5837 survey fee.
Crucially, the count is not just trees inside your red line. It includes trees on neighbouring land whose canopies overhang the site or whose root protection areas project into it — those must be surveyed too. A boundary lined with third-party trees can quietly double the tree count and push the price up before you have even touched your own plot.
2. Site size and complexity
Larger sites take longer to walk and record, but complexity matters more than raw acreage. A cramped plot surrounded by mature trees, changes in level, existing buildings constraining root growth, dense groups needing individual teasing-out, or a phased development all add work. A large but open field with a few young trees can be cheaper to survey than a small, tree-constrained garden.
Worked example. A quarter-acre suburban plot for a rear extension, ringed by six mature neighbouring oaks and limes whose RPAs all cross the boundary, will typically cost more than a two-acre paddock with eight scattered young field maples — because the suburban job means more constraint plotting, more careful RPA work near the works, and a harder impact assessment.
3. Access
The surveyor has to physically reach and stand at each tree to measure the stem and assess condition. Dense undergrowth, locked neighbouring land, steep or waterlogged ground, or trees that can only be assessed from a distance all slow the visit down — and if a tree cannot be reached at all, a revisit or a caveated assessment may be needed. Arranged, unobstructed access on the day is one of the few things that genuinely trims the bill. If you can clear brambles, unlock gates and give notice to neighbours whose trees overhang, do it before the visit.
4. Report type
This is where quotes most often diverge, because "tree survey" can mean very different deliverables:
| Deliverable | Roughly includes | Typical use |
|---|---|---|
| Basic tree survey (small domestic) | Survey schedule only — the record of trees | Small householder jobs, early feasibility |
| Survey + tree constraints plan | Adds a scaled drawing of RPAs and constraints | Shaping a layout before design |
| Survey + arboricultural impact assessment | Tests your proposed layout against the trees | Most planning submissions |
| Full BS5837 planning package | Survey + TCP + AIA + tree protection plan + preliminary method statement | Development sites councils want to validate |
A basic domestic survey can start around £295–£760; a full package for a development site commonly runs £400–£1,500 or more. Two "tree survey" quotes can be a factor of three apart simply because one is a bare schedule and the other is the whole package a council needs to validate an application. The single most useful question to ask a quoting consultant is: which of these documents does my application actually need? For the standalone add-on, see the arboricultural impact assessment cost guide.
5. Protected and high-value trees
Legal protection and tree value both add scope. If a tree carries a Tree Preservation Order, sits in a Conservation Area, or is a veteran or ancient specimen, the consultant has to handle it with more care and often more paperwork — and the tree officer will scrutinise the report harder. Veteran and ancient trees also carry an enhanced root protection area of 15 times stem diameter (versus the standard 12×), which enlarges the constrained zone and complicates the design work. Ancient woodland nearby brings a minimum 15-metre buffer into play. None of this is priced into a bare schedule, so flag protected trees when you ask for a quote. See our tree preservation orders guide for what protection actually means.
6. Turnaround
A standard site is often reported within about one to two weeks of instruction. Need it faster? Expedited turnaround usually carries a premium, because it means jumping the consultant's queue. One helpful quirk of BS5837 work: the survey can be done year-round — it does not need leaf-on conditions — so unlike ecology surveys it is rarely held up by season. If protected-species or ecology surveys are triggered alongside (bats, nesting birds), though, those have tight seasonal windows and can dominate your overall timeline. For realistic timings, see how long a tree survey takes.
7. Location
Where the site is matters twice over. First, market rates: consultants in and around London and the South East generally charge more than those in, say, the North or Midlands, and travel to a remote site adds cost regardless of the going rate. Second, and often overlooked, what your council requires changes what you have to buy — which brings us to the point that catches most people out.
Requirements are set locally — check your council
There is no single national rule that says "a BS5837 survey costs X" or even "you must submit a full package." The requirement — and therefore the scope, and therefore the price — is set by your local planning authority's validation list. Some councils are satisfied with a survey and impact assessment at application stage and defer the method statement to a pre-commencement condition; others want the full suite up front. Some sit in areas thick with TPOs and Conservation Areas; others barely touch them. The tree officer's strictness in practice varies too.
That local variation is real and it moves the number. Before you compare quotes, confirm what your authority's checklist actually demands. PlanWatch tracks live tree-related planning activity council by council, so you can see how trees are being handled in your area and gauge the local picture — check Leeds, Manchester or Bristol, or find your own authority from the tree-surveys hub. Our which LPAs require a tree survey guide explains the pattern.
A note on nations: this guidance is England-centric. BS5837:2012 applies UK-wide as a standard, but validation lists, TPO regimes and fees differ in Scotland, Wales and Northern Ireland, which affects both scope and cost.
Compare on value, not just headline price
The cheapest quote is often the thinnest report — a schedule without the assessments a planning officer actually needs, or a report from an unaccredited consultant the tree officer is likely to challenge. Remember BS5837 is a British Standard of recommendations, not law; what makes a report succeed is that it satisfies the local planning authority's validation list and its tree officer. A report that fails that test gets your application invalidated, and the redesign and delay cost far more than you saved — the most expensive tree survey is the one you have to pay for twice.
See cheap tree surveys: the hidden costs and why surveys get rejected at validation, and when you are ready, learn how to choose an arboricultural consultant and find a tree surveyor worth instructing.