Tree Preservation Orders

Understanding Tree Preservation Orders

A Tree Preservation Order is a legal designation made by the local planning authority to protect specific trees or groups of trees that contribute to the amenity of an area. Once a TPO is in place, it is an offence to cut down, uproot, top, lop, wilfully damage, or wilfully destroy the tree without the council's written consent.

TPOs exist across Hertfordshire, Buckinghamshire, and the London boroughs we serve. They are particularly common in conservation areas, on estates with mature trees, and on land adjacent to development sites. The leafy streets of Chorleywood and Radlett hold some of the densest concentrations of protected trees in our patch, and we field regular enquiries from property managers there. If you manage property with trees, understanding the TPO regime is essential to avoiding costly mistakes.

How We Help with TPO Applications

Securing permission to work on a protected tree requires a properly presented application supported by sound arboricultural reasoning. A vague request to "reduce the tree" without specifying the extent, method, and justification will almost certainly be refused.

We handle the entire process:

• Initial inspection — we assess the tree, identify the works needed, and advise you on the likelihood of consent being granted
• Application preparation — we complete the standard application form with precise specifications for the proposed works, including crown dimensions, percentage reduction, and pruning methodology
• Supporting report — where needed, we provide an arboricultural report explaining the condition of the tree, the justification for the works, and evidence such as decay detection results or structural assessment findings
• Council liaison — we deal directly with the tree officer, respond to queries, and attend site meetings if required
• Carrying out the works — once consent is granted, our team carries out the approved works to the exact specification, ensuring full compliance with any conditions

Works to Trees in Conservation Areas

If your property falls within a conservation area, all trees with a trunk diameter of 75mm or more (measured at 1.5m above ground) are protected, regardless of whether they have an individual TPO. Before carrying out any work, you must submit a Section 211 notice to the council and wait 6 weeks.

During that period, the council will decide whether to allow the works, impose a TPO, or request further information. We prepare and submit conservation area notifications for our clients as a routine part of the job, ensuring the correct information is provided and the required waiting period is observed. We handle these submissions frequently for period properties and churches in Abbots Langley and Tring conservation areas.

Common Reasons for TPO Applications

We regularly submit TPO applications on behalf of homeowners, property managers, and developers for a range of reasons:

Structural Concerns

Trees causing subsidence, root damage to foundations, interference with drainage systems, or damage to boundary walls. These applications are typically supported by structural engineer reports alongside our arboricultural assessment.

Health and Safety

Dead or dying trees, significant deadwood overhanging public areas, major structural defects such as included bark unions or basal decay. Where a tree presents an immediate danger, the council allows emergency works without prior consent — but you must notify them within 5 days and be able to demonstrate the urgency.

Amenity and Nuisance

Excessive shading, blocked light to habitable rooms, interference with TV or satellite reception, and leaf or fruit drop. These are harder to gain consent for, and the council will weigh the amenity value of the tree against the issues cited. We advise honestly on the prospects before you invest in an application.

Development

Where a TPO tree conflicts with an approved planning permission, or where pre-application discussions indicate that removal may be accepted subject to replacement planting. These applications are best handled in conjunction with a BS5837 tree survey and arboricultural impact assessment, so the arboricultural and planning cases are presented as one coherent package.

Council-Specific Knowledge

TPO procedures and tree officer expectations vary between councils. We work regularly with every local authority across our service area and understand the preferences and requirements of each:

• Three Rivers District Council — covers Rickmansworth, Croxley Green, Abbots Langley, Chorleywood, and our own base area
• Watford Borough Council — covers Watford town centre and surrounding areas
• Hertsmere Borough Council — covers Bushey, Radlett, Borehamwood, Elstree, and Potters Bar
• Dacorum Borough Council — covers Hemel Hempstead, Kings Langley, Berkhamsted, and Tring
• St Albans City & District Council — covers St Albans and surrounding villages
• London Borough of Harrow — covers Harrow, Pinner, Stanmore, and Hatch End
• London Borough of Hillingdon — covers Northwood, Ruislip, and Uxbridge
• London Borough of Barnet — covers Barnet and Edgware

This local knowledge means we can advise you accurately on processing times, the likelihood of consent, and any council-specific documentation requirements.

Replacement Planting Conditions

When consent is granted to remove a TPO tree, it almost always comes with a condition requiring you to plant a replacement tree of a specified species and size within a set timeframe — usually the next available planting season. If the replacement tree dies within 5 years, you are legally obliged to replant.

We advise on appropriate replacement species, taking into account soil conditions, available space, and the character of the area. Our tree planting service covers everything from species selection through to aftercare, ensuring you meet the condition and the new tree establishes successfully. We have handled replacement schemes on approved removals in Hatch End and on a listed estate near Gerrards Cross.

Areas We Cover

We handle TPO applications and carry out permitted works to protected trees across our full 30-mile service area from Watford, including Rickmansworth, Harrow, Bushey, St Albans, Hemel Hempstead, and all surrounding areas.