What Is a Tree Survey? Essential Guide for Landowners and Developers

What Is a Tree Survey? Essential Guide for Landowners and Developers

A tree survey is a systematic assessment of every tree on a property—recording species, size, condition, and value. It's a legal requirement for most development applications and a smart management tool for any landowner.

What's Recorded (Per Tree)

• Species (botanical + common name)
• Unique reference number (tagged on tree)
• Age class (young, semi-mature, mature, veteran)
• Height (m)
• Stem diameter at 1.5 m (DBH, cm)
• Crown spread (N/E/S/W, m)
• Condition: Good / Fair / Poor / Dead
• Structural issues: Decay, cracks, cavities, included bark, lean
• Life expectancy (years)
• Root protection area (RPA) radius
• Retention category (A/B/C/U per BS 5837)
• Work recommendations: Prune, remove, monitor, none

Why It's Required

• Planning applications: Most UK/US/CA municipalities require tree survey + constraints plan for any development near trees.
• Tree Preservation Orders (TPOs): Survey identifies protected trees.
• Construction damage prevention: RPA defines no-dig zone around roots.
• Risk management: Identifies hazardous trees near targets (buildings, paths, roads).
• Insurance/mortgage: Some lenders require for large trees near structures.

Survey Process

1. Arborist walks site; tags & measures each tree.
2. Data entered into GIS/CAD software.
3. Constraints plan drawn: RPA circles, retention categories, shade footprints.
4. Report written: Schedule, methodology, recommendations, maps.
5. Submitted with planning application or retained for management.

Beyond Compliance: Management Value

• Budget planning: Prioritize work by risk/value.
• Phased pruning/removal over years.
• Monitor veteran trees annually.
• Succession planting: Replace removals with site-appropriate species.
• Ecological audit: Bat roosts, bird nests, invertebrate habitat.

Who Performs It

Qualified arborist (ISA Certified, LANTRA, or equivalent). Not a general landscaper or surveyor.

A tree survey isn't red tape—it's a blueprint for living with trees responsibly. Whether you're building a driveway or stewarding a woodland, it's the first step.