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Where surface water wording appears

• Numbered conditions — binding on the sealed notice schedule.
• Landscape and screening — landscaping and tree protection, external materials and colour.
• Noise and hours — noise and hours conditions for plant or generators.
• Highways and access — highways access conditions for maintenance vehicles.

Common condition phrases

Heritage and design context

Rooftop installations in sensitive settings may carry heritage and conservation conditions or design and access conditions. Read each numbered line separately.

Timing and discharge

Equipment details are often pre-commencement — pre-commencement vs pre-occupation, which conditions need discharge, informatives vs numbered conditions.

Officer report vs sealed notice

Officer reports discuss visual impact narratively — binding text is the sealed notice — decision notice vs officer report.

Ecology and BNG crossover

Mast compounds on greenfield sites may sit beside ecology and wildlife survey conditions or biodiversity net gain vs LEMP conditions. Read each numbered line separately — surface water equipment conditions do not replace ecology submissions.

Advertisement and lighting

Illuminated cabinets or aviation warning lights may trigger separate conditions — advertisement consent conditions, fire safety and building safety conditions on compound buildings. Read lighting and signage lines separately from mast height conditions.

Worked example — rooftop cabinet condition

A sealed notice might state:

• Condition 6: “Prior to installation, details of SuDS component type, height, colour and screening shall be submitted to and approved in writing by the LPA.”
• Condition 11: “The equipment shall be removed and the roof made good within six months of cessation of use.”

Literacy split: Condition 6 governs install programme; Condition 11 governs decommissioning — track both on a conditions register. Materials approval may also cross-reference materials conditions.

Common misreadings

• ICNIRP or health narrative in officer report read as a condition. Only numbered conditions bind unless incorporated by reference — check the notice text.
• Height in application drawings assumed approved without condition 6 discharge. See which conditions need discharge.
• Tree works assumed covered by surface water detail approval. Use landscaping conditions separately.
• Time limit for implementation ignored on renewals. Read time limit conditions.

Condition triage checklist

Why mast permissions carry detail-heavy conditions

Surface water equipment is visually small in engineering drawings but politically sensitive in officer reports. Conditions translate that sensitivity into approval steps: colour, screening, removal on cessation. Operators reading only the permission summary email may miss a decommissioning clause that binds years later — the sealed notice is the document to file alongside lease and wayleave paperwork.

When multiple operators share structures, read whether conditions attach to the apparatus permission you hold — not a neighbour’s prior approval.

Retained structures and rooftop fixings

Rooftop mounts may cross-reference retained structure conditions where fixings affect a host building — read structural and surface water lines separately even when one contractor delivers both.

Host landlord consents are outside the planning notice; the conditions still bind the planning permission holder named on the decision. If the host building later changes use class, re-read time-limit and compliance conditions before adding equipment.

Working checklist for operators

1. List conditions referencing SuDS components, masts, cabinets, dishes or small cells.
2. Note colour, materials and landscaping triggers before ordering equipment.
3. Check noise or generator conditions if backup plant is proposed.
4. Confirm whether maintenance access tracks need separate highways approval.

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All guides: /guides/. Related: design and access conditions, materials condition wording.