L-shaped dormer drawings in Enfield

From Victorian terraces to interwar semis

Enfield mixes terraced streets with long suburban semis. Only some have the rear outrigger an L-shaped dormer needs, so we survey the roof shape before suggesting one.

Gardens cover 21.7 per cent of the borough's land, and the average home costs 470,988 pounds. At that price many owners add space instead of moving, and a loft that gains two rooms is a common answer.

Listed buildings and protected setting

Historic England lists 301 entries in Enfield. Few are ordinary family houses, but a listed house nearby, or within the setting of a protected building, can still influence how officers read a new roof.

We map each designation within reach of your address and record them on the drawings' cover note, so the planning officer sees that they were considered.

What the decision figures show

The council decided 934 householder applications in the latest year and granted 83.4 per cent. It decided 92.4 per cent in time.

Lawful development certificates are common as well, with 636 in the latest national return. The certificate route suits a roof outside any direction or conservation area.

National limits the L still has to meet

Volume is capped at 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume, and the height rule is: No part higher than the highest part of the existing roof. Joining a rear extension roof is easier: Eaves-retention and 0.2 m set-back do not apply where the enlargement joins the original roof to the roof of a rear or side extension.

Notice for shared structures is: Party structure notice at least 2 months before work. The stair must achieve this headroom: Loft conversions where 2.0 m cannot be achieved: 1.9 m at the centre of the stair, 1.8 m at the side (half width). The wider L-shaped dormer guide lays these out in full.

Reading an Article 4 direction before you commit

Ask the council for the direction document, not a summary. We look for four things: the date it took effect, the list of properties covered, which classes of development it withdraws, and whether it is confined to elevations facing a highway. A direction limited to the front elevation leaves a rear L-shaped dormer on the permitted development route.

If your road is inside a direction that covers the roof, the application is for planning permission and we draw to the standard that route needs, including street scene views and a design statement.

Typical Enfield roof forms

Terraced rows in the older parts of the borough usually have a clean gable-ended outrigger that suits the L well. The long suburban semis to the north tend to have a hipped main roof with a smaller rear return, which limits the dormer and sometimes favours a plain rear dormer with a rooflight on the return.

Our survey measures the ridge heights, the eaves line and the position of the chimney stack, because those fix the useful headroom more than the overall roof size.

Costs and sequence

The order of work matters. We confirm the route first, then survey, then draw, and only then ask you to approve the application. If a direction forces a planning application, the design stage includes the extra views and the written justification, so you do not discover that cost late.

Building control follows the consent, with its own drawings for structure, fire and insulation, which we can prepare as one continuous package so the planning and construction sheets agree.

We keep every measurement and photograph from the survey on file, so any later question from officers about heights or the position of the junction can be answered quickly and consistently.

What we deliver and where to go next

A second MCIAT chartered technologist checks every sheet before it leaves us, and we redraw at no charge until approval if the council asks for changes.

Compare dormer loft conversion drawings in Enfield or house extension drawings in Enfield, see the Enfield architectural drawings hub, or the neighbouring L-shaped dormer drawings in Haringey.