Daylight, Sunlight and Amenity – Page 13

Overshadowing from trees and the high hedges complaint

Planning rules on overshadowing apply to buildings, not vegetation. For evergreen hedges over two metres there is a separate statutory route, and for a single tree there is usually none at all.

Writing daylight evidence a committee report can use

Daylight reports fail at the last step, when an officer has to compress them into a committee report. Structure the evidence for that reader and the conclusion survives.

Sunlight to a north facing window: what to expect

A north facing window is not assessed for sunlight under BRE guidance at all. The test that does apply measures skylight, and it is the one a neighbour objection should cite.

Amenity space standards for flats: private, communal and play

Balcony sizes, communal gardens and child play space are set locally, not nationally. Where the numbers come from and how to evidence a scheme that falls short.

Solar glare from glazed facades onto roads and railways

Glint and glare from a facade is a safety issue raised by highway and rail bodies. The fix is inexpensive at design stage and costly once the curtain walling is ordered.

Transient overshadowing of allotments and playing fields

Growing ground and sports pitches are judged on whether the land can still do its job, so shadow analysis has to run across the year rather than on one equinox drawing.

Daylight and sunlight in a section 73 amendment

Varying a condition under section 73 creates a fresh permission, which reopens the daylight and sunlight assessment. Whether the baseline is the existing situation or the consented scheme decides what the numbers mean.

Daylight modelling outputs a case officer can check

Most weaknesses in a daylight and sunlight report sit in the assumptions rather than the arithmetic. This checklist works through geometry, reflectances, scope, baseline and the tables that let a reviewer audit the conclusion.

Winter gardens and enclosed balconies in daylight terms

Winter gardens solve an acoustic problem by putting glazing, framing and a soffit in front of a habitable room. The daylight assessment has to carry all three, and the assessment point is the inner window.

Separation distances between facing windows

No national policy sets a privacy separation distance. Here is where the familiar figures came from and how to argue a scheme that falls below them.

Obscure glazing: which privacy level to specify

Level 3 satisfies most councils, level 4 or 5 where a window looks straight into a garden. The specification belongs on the drawing, not in a condition written later.

Single aspect north facing flats and amenity policy

No rule bans single aspect north facing flats, which is why they are argued on judgement. Here is how to reduce the count and evidence the units that remain.

Daylight, Sunlight and Amenity8 min read

Assessing daylight inside your own proposed flats

The neighbour case argues from a baseline. The internal case has none. Here is how to test the flats you are proposing, and how to report the rooms that fall short.

Daylight, Sunlight and Amenity8 min read

Rooms lit only by a rooflight and the daylight tests

A rooflight has no vertical plane, so the familiar BRE tests do not apply. Here is the assessment route for top-lit rooms, and the modelling assumptions reviewers look for.

Daylight, Sunlight and Amenity8 min read

BS EN 17037 daylight targets against BRE guidance

One standard measures illuminance inside your new flats. The other measures obstruction at the neighbour's window. Schemes pass one and fail the other, so both belong in the submission.

Average daylight factor and where it still applies

The 1, 1.5 and 2 per cent daylight factor targets came from a withdrawn standard, yet ADF still appears in adopted policies and prior approval assessments. What it measures and when to use it.

Sun on ground: testing a garden at the equinox

The sun on ground test asks whether half an amenity area still gets two hours of sun on 21 March. How to define the area, build the model and present the result.

Writing the amenity section of a design and access statement

The amenity section exists to show you measured the relationship with the neighbours before you drew the scheme. Four to six paragraphs, three annotated drawings, objections answered in advance.

Amenity standards for bedrooms in shared and co-living

A shared bedroom is judged twice against standards that do not match: the licensing minimum floor areas and the planning tests on daylight, outlook and ventilation.

Boundary walls, fences and light to a ground floor window

Part 2 Class A allows 2 metres at the rear and 1 metre next to a highway. Here is how to test light loss from a low obstruction, and what to do when the fence is lawful.

Validating a daylight model before you rely on it

Errors in daylight assessments live in the inputs rather than the software. A reviewer's order of work: geometry provenance first, surface assumptions second, hand checks last.

Roof terraces and overlooking from raised private space

A raised platform over 0.3 metres is excluded from every householder permitted development class, so a roof terrace always needs permission. What makes one acceptable at consultation.

High hedges complaints and the loss of light procedure

A high hedge complaint is a statutory remedy separate from planning. What the two metre and evergreen tests mean, the steps you must take first, and how the council calculates an action hedge height.

Daylight for a rear extension in a Victorian terrace

One window usually decides these disputes. Here is how the 45 and 25 degree tests work and which design changes actually help the neighbour.