Objecting to a telecoms mast: what actually counts

Objecting to a telecoms mast works only if the objection stays inside the scope of the decision being made. Most masts come forward under Part 16 of Schedule 2 to the General Permitted Development Order 2015, where the operator already has the right to install the apparatus and the council's power is limited to deciding whether prior approval is needed for its siting and appearance. The authority cannot refuse on need, it cannot reopen the health question where a conformity declaration is provided, and it has 56 days before the development can proceed regardless.

So the objections that land are about where the mast goes and what it looks like, supported by something the officer can use. Everything else is read and set aside.

Which consent route a mast follows

Three routes exist and the first thing to establish is which one you are dealing with. The application reference and the description on the council's planning register will tell you.

Prior approval under Part 16 is the common route. The operator applies for a determination as to whether the authority's prior approval is required to the siting and appearance of the development. Part 16 sets height limits for ground-based masts, with lower limits on protected land, and those limits were raised by amendments in 2022 alongside new rights to strengthen existing masts. Check the current text of Part 16 for the limit that applies, because it has changed more than once.

Full planning permission is needed where the proposal exceeds the permitted limits, or where Part 16 does not apply to the land in question. Here the full range of material considerations is available, which makes a fuller objection worthwhile.

The third category is development that needs neither, such as small antennas on an existing building within the permitted limits, or replacement of equipment on an existing mast. Nothing can be done about those through the planning system.

Separately from planning, operators have rights under the electronic communications code in the Communications Act 2003 to install apparatus on land, including rights obtained from a landowner by agreement or through the tribunal. Those are property rights and an objection to the planning application cannot touch them.

The prior approval scope: siting and appearance

Siting means where on the land the mast and its associated cabinets are placed, and appearance means what the installation looks like. That is the whole of the authority's discretion under the prior approval route.

Inside that scope there is more room than people assume:

• The precise position within the site, including whether the mast could sit behind an existing building, within a tree group, against a boundary rather than on a prominent corner, or further from a junction
• The height, insofar as a lower installation would reduce visual effect, though the operator will argue coverage
• The design of the structure itself: monopole against lattice, shrouded antennas, slimline designs
• The finish and colour, which matters more than people expect in a street scene or against a woodland backdrop
• The position, size, colour and screening of the equipment cabinets, which are often the thing actually visible from a pavement
• Landscaping and screening around the base

Outside the scope: whether the area needs better coverage, whether this operator should be the one providing it, whether property values will fall, and whether the mast is safe.

A useful objection therefore reads as a design critique with an alternative. "Site it in the north-east corner behind the existing substation, where the lattice would be read against the building rather than the sky, and reduce the cabinet run to two units" is a proposition the officer can negotiate. "We do not want a mast here" is not.

Health effects and the compliance certificate

This is where most mast objections are spent and it is the one ground that cannot succeed.

National policy requires applications for telecommunications development to be accompanied by a declaration that the installation will conform to the public exposure guidelines of the International Commission on Non-Ionizing Radiation Protection. Where that declaration is provided, authorities are told not to set health safeguards of their own and not to reopen the question, because it is dealt with by the national exposure framework rather than by the planning system.

The result is that an objection based on health, however sincerely held, gets one line in the officer's report recording that a conformity declaration has been submitted. Petitions on health grounds do not change that.

What you can legitimately check is whether the declaration is actually there and whether it covers the installation as proposed. Telecommunications Compliance documentation addresses conformity with those exposure guidelines and is normally prepared with input from a radio frequency engineer. If the submitted documents do not include a declaration, say so, because that is an information deficiency rather than a health argument and the authority can require it.

Proximity to a school is not a health ground either, though national guidance does expect operators to have consulted the school or college where a proposal is near one, and an absence of that consultation is a procedural point worth making.

Mast sharing and alternative site assessments

National policy expects operators to keep the number of masts to the minimum consistent with the needs of the network, and to use existing masts, buildings and other structures where possible. Supporting information should show what alternatives were considered.

That gives an objector a real line of attack, and it sits within siting rather than need. Look at the submitted site selection note and test it:

1. Does it list the existing masts and tall structures within the search area, with a reason for discounting each? A note that says alternatives were considered and found unsuitable, with no detail, is not evidence.
2. Is there an existing mast nearby that could be shared or strengthened? Part 16 now gives wider rights to increase the height of existing masts, which makes sharing easier than it used to be and weakens the argument that a new structure is unavoidable.
3. Are there taller buildings, a water tower, a floodlight pylon, an existing pole or a commercial roof in the search area?
4. Was the operator's search area drawn tightly around a preferred site, or does it reflect the coverage requirement honestly?

Objections that name three specific alternative structures with their addresses are far more effective than those asserting that alternatives must exist.

Masts in conservation areas and on protected land

On protected land, which includes conservation areas, National Parks, National Landscapes, the Broads and World Heritage Sites, Part 16 is more restrictive and the permitted heights are lower. Some development that would be permitted elsewhere needs full planning permission here.

Where a mast affects a conservation area or the setting of a listed building, the authority is under statutory duties: section 72 of the Planning (Listed Buildings and Conservation Areas) Act 1990 requires special attention to be paid to the desirability of preserving or enhancing the character or appearance of a conservation area, and section 66 requires special regard to the desirability of preserving a listed building and its setting.

Those duties carry real weight and they are the strongest statutory hook available to an objector. Make the heritage case properly: identify the designated asset, describe its significance in a sentence or two, explain how the mast and cabinets would affect it from identified viewpoints, and attach photographs from those viewpoints. Where the operator has not provided a visual assessment at all, point out that the authority cannot discharge its duties without one. A formal Townscape and Visual Impact Assessment is the document that does this properly, and asking for one is a reasonable request on a sensitive site.

Trees are worth checking too. A mast or cabinet base within the root protection area of a tree covered by a Tree Preservation Order raises a separate and enforceable issue.

The 56 day deadline and deemed approval

Timing decides more mast objections than merit.

Under the prior approval route the authority has 56 days from receipt of the application to notify the operator of its determination. If it fails to do so within that period, the development may proceed as submitted. There is no extension by agreement in the way there is for a conventional application.

Within those 56 days the authority still has to publicise the application, consult and consider representations, so the comment period is short, sometimes 21 days and occasionally less. Site notices for masts are easy to miss because they go up on a lamp post rather than on a house.

Practical consequences. Check the planning register weekly if you know an operator is searching your area. Submit your objection within the stated period rather than asking for an extension. Ask to be notified if the siting is amended, because whether neighbours are reconsulted on amended plans is a matter of local practice and a written request on file helps. And if the deadline passes without a decision, the opportunity has gone, which is worth knowing before you spend three weeks drafting.

When a decision does arrive, read it properly. What a decision notice controls determines what can be enforced if the mast is built differently from the approved drawings, and masts are built differently more often than you would think.

Writing an objection that stays in scope

Keep it to a page and a half, with photographs.

Open by stating the route the application follows and therefore the scope of the decision, which signals to the officer that you understand what they can and cannot do. Then make no more than four points, each with evidence: the siting point with a suggested alternative position, the appearance point covering structure, finish and cabinets, the heritage or landscape point with named assets and viewpoints, and the alternatives point naming specific existing structures.

Attach two or three photographs taken from the positions that matter, with a pole or a person for scale, and annotate where the mast would sit. Say which direction each was taken from.

Close with what you are asking for, which should be a specific amendment or a condition rather than refusal. On a prior approval application the realistic outcome is a relocated mast, a different finish, screened cabinets or a shorter structure. Securing one of those is a result.

Collective objections help with weight but not with substance. One well-evidenced letter plus a short covering note from the parish council carries more than forty identical emails.

This is general guidance rather than legal advice, so check the position with your local planning authority or a qualified professional before relying on it. If you need to understand which documents an application of this kind should contain, you can browse the 66 report types by category.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.