Building regulations drawings in Bromley

Building regulations drawings in Bromley: structure, fire and drains

The set covers foundations and floor plans, roof and upper floors, sections, junction details and a specification. Where an extension joins an older building we draw the junction at large scale, with the cavity, the damp-proof course and the movement joint all shown.

On a Bromley plot, drainage deserves attention. Extensions often sit over or beside an existing run, and the layout has to show the falls, the access points and any build-over agreement the sewer owner needs. Our structural calculations in Bromley cover the beams and padstones.

Fire safety is drawn to Part B: escape from a loft or first floor, protection to the new stair, smoke alarms and the like. If you have not yet settled the design, a Lawful Development Certificate in Bromley or planning drawings in Bromley come first.

Energy edition and competence

AD L 2026 (Home Energy Model) takes effect 24 Mar 2027 for non-higher-risk work. Applications made before then are checked against the current edition. We note the governing edition on the cover sheet, and for a larger scheme we raise timing with you at the first call.

Since Part 2A of the regulations took effect, Anyone carrying out design or building work must have the skills, knowledge, experience and behaviours (or organisational capability) to do it. In a Bromley job that means we say in writing what we are responsible for, and your builder knows the duties that pass to them.

How Bromley has been deciding householder applications

Bromley decided 1,609 householder applications in its latest published year and granted 78.6 per cent. 89.1 per cent were decided within the time allowed or an agreed extension.

These figures relate to planning, and in a borough with this much protected land they vary a good deal by street. We quote them to set expectations on timing, not to predict an outcome.

Surveying large and older Bromley plots

If a Bromley house has been extended before, that earlier work is a risk: it may have shallow foundations, a lintel of unknown strength or a roof that was never tied back to the original. We open up accessible areas during the survey, record what we find and draw the new work against the real structure.

Trees are the other recurring matter. A mature tree close to a new foundation can change its depth, and the sheets then show the depth and the method. Where a tree is protected, the planning side has its own rules, and the construction set simply follows the permitted layout.

We also look at levels. A sloping garden changes the height of the damp-proof course, the step at the threshold and the fall of the drains. Part M expectations for level thresholds are drawn where they apply, and the surface water route is shown so the examiner can see where rainwater goes.

All of this goes into the survey notes you receive with the drawings, so your builder can see what was assumed and what was measured.

Price and next steps

Building regulations drawings start at £845 with VAT included, fixed up front. Sheets usually follow the survey by about a week, and revisions after an examiner's comments carry no charge. See architectural drawings in Bromley for the borough as a whole, or compare Croydon and Bexley next door.