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Landscaping in Westminster

Terraces and courtyards,
in Westminster.

Very little of Westminster has a conventional back garden. What it has instead is roof terraces, mews courtyards and mansion-block balconies — all of which are engineering before they are planting.

Building in Westminster

What we work with here

01

Stucco terraces, mews and mansion blocks

Belgravia and Pimlico are stucco-fronted terraces with small, deeply enclosed rear gardens and, more often, flat roofs and rear extensions that have become the real outdoor space. Marylebone and Bayswater add mansion blocks where the outdoor room is a balcony or a shared roof. The mews houses behind the main terraces have compact paved courtyards. St John's Wood and Maida Vale are the exception, with genuine gardens behind larger villas. In most of the borough the question is not what to plant but what the structure can carry and how anything gets up there.

02

Weight, waterproofing and wind

A roof terrace is a structural proposition. Saturated soil is heavy, and a planter full of wet compost with a semi-mature tree in it is heavier still, so the loading has to be checked against what the roof was designed for before anything is specified — that is a structural engineer's call, not a landscaper's guess. Above it sits the waterproofing, which must not be penetrated: terraces are built on adjustable pedestals over the membrane, with access retained for inspection. And exposure at fourth-floor level is severe. Wind dries containers fast, so irrigation is usually a requirement rather than a convenience, and planting has to be chosen for it.

03

Listing, conservation and access through the front door

Westminster has an exceptional density of listed buildings and conservation areas. Alterations affecting a listed building need listed building consent, and that can extend to a roof terrace, a balustrade, or changes visible from the street or a neighbouring property. Works are frequently the subject of a lease as well as planning, so freeholder or managing agent consent is often the first hurdle. Physically, materials reach a Belgravia roof by hoist, by crane on a permitted road closure, or one bag at a time up a communal stair — a real cost that we establish and price at survey rather than later.

Questions we get asked

Westminster, specifically

Can my Westminster roof terrace take planters and paving?
That has to be answered by a structural engineer, not assumed. Wet soil is heavy and large planters concentrate a lot of load in one place, so the roof structure needs assessing against the intended layout before anything is specified. Where capacity is limited there are good answers — lightweight substrates, pedestal-mounted porcelain instead of a bedded screed, and planting concentrated over load-bearing walls rather than mid-span.
Do I need consent for a roof terrace on a listed building?
Very probably. Works that affect the character of a listed building need listed building consent, and a roof terrace, its balustrade and its access almost always do. Planning permission may be required as well, particularly where there is overlooking, and if you are a leaseholder the freeholder's consent comes first. It is worth establishing all three before design work starts rather than after.
What survives on an exposed London roof terrace?
Things that tolerate wind and drought at the root. Exposure at height dries containers far faster than ground-level beds, so automatic irrigation is close to essential on anything but the smallest scheme. Tough evergreens, multi-stem small trees chosen for a wind-firm habit, grasses and Mediterranean planting all do well; thin-leaved specimens and anything needing shelter will scorch. Substrate depth and container size matter as much as species choice.
Coverage

Areas we cover in Westminster

  • Belgravia
  • Pimlico
  • Marylebone
  • Maida Vale
  • St John's Wood
  • Bayswater

Postcode districts: W1 · W2 · W9 · SW1 · NW8

All 32 London boroughs

Get a free quote in Westminster.

Tell us about the site and we will arrange a survey. Written, no-obligation quotes for anywhere in Westminster.

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