Loft conversion drawings in Bexley from £625
Sidcup, Welling, Bexleyheath, Erith and Old Bexley: one measured survey, drawings to the borough’s own requirements, and an Article 4 check on your road first.
£625 £475 drawings + £150 survey (£625 total), no VAT to add
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The short answer
Most Bexley houses are not under an Article 4 direction for roof work, so most lofts follow the usual route, but a handful of streets in Old Bexley are different: the council’s direction there names attic rooms and roofing materials. Bexley prefers A3 sheets, a 0 to 10 metre scale bar and no “do not scale” notes. Our fee is £475 drawings + £150 survey (£625 total), no VAT to add; the council’s fee is separate.
Loft conversion drawings
from £625
- Drawings
- £475
- Measured survey
- £150
- Total you pay
- £625
- VAT
- None to add
- A measured survey of the roof, the stair and the landing below
- A check of your address against Bexley’s four conservation area Article 4 directions
- Existing and proposed plans, roof plan, elevations and sections at 1:50 or 1:100, on A3 with a 0 to 10 metre scale bar
- Location and block plans, ownership certificate and site photographs
- Submission to Bexley, an independent check of every sheet and free redraws until approval
£475 drawings + £150 survey (£625 total). A starting fee: we confirm one fixed figure after checking your address. The council’s own fee, where there is one, is paid to the council.
Get my fixed feeHow a Bexley loft job runs
Address check
We check whether your road is one of the properties named in an Old Bexley, Brook Street, Red House Lane or Old Forge Way direction.
Survey
We measure the roof, stair and floors below, and photograph the roof slopes, the street and the neighbours’ roofs.
Draw to Bexley’s format
A3 sheets, each with a title, drawing number, scale, paper size, key dimensions and a scale bar from 0 to 10 metres.
Submit and follow
We submit, answer the case officer and amend drawings until a decision, which for a house is normally inside eight weeks.
Old Bexley: the directions that name attic rooms
Bexley has made Article 4(2) directions in four conservation areas: Brook Street, Old Bexley, Old Forge Way and Red House Lane. They cover named properties, not whole areas. The Old Bexley direction brings “minor alterations including attic rooms” under council control at numbers 4 to 14 North Cray Road, and the roofing material and windows at 99 to 115 Bexley High Street.
For example, an owner at 8 North Cray Road who assumes a rear dormer is permitted development would be wrong: the direction takes that route away. Most Bexley addresses are not on those lists, which is why we check the exact house number before we price.
What Bexley’s requirements document asks for
Bexley’s planning application requirements ask for a location plan with at least two road names, a block plan, existing and proposed elevations including flank elevations, and floor plans, with roof plans and sections where the validation officer needs them. Because a loft changes the roof shape, we draw the roof plan whether it is asked for or not.
For householder drawings the council prefers A3, and it generally does not accept plans marked “do not scale” unless every dimension is shown. A design and access statement is needed only for a site in a conservation area where the new floor space is 100 square metres or more, which a loft rarely reaches.
Timing and CIL in Bexley
Bexley decides nearly all of its householder applications on time, but the clock only starts when the application is valid, which is why the format above matters.
Bexley’s own CIL started on 30 April 2015 at £40 per square metre in Zone 1 and £60 in Zone 2 before indexation, and Mayoral CIL is added. CIL generally applies from 100 square metres of new floor area, so a typical loft is outside it.
Loft conversions in Bexley in numbers
755 of 758
Householder decisions by the London Borough of Bexley between July 2025 and June 2026 (prior approvals left out) that were made inside 8 weeks.
Source: MHCLG live table PS2, district planning application statistics, July 2025 to June 2026 (GOV.UK)
A3
Paper size Bexley prefers for householder and small minor drawings; plans marked “do not scale” are generally not accepted.
Source: Planning Application Requirements, London Borough of Bexley (document reviewed 17 October 2018)
0 to 10 m
Minimum scale bar Bexley asks for on every plan and drawing.
Source: Planning Application Requirements, London Borough of Bexley (document reviewed 17 October 2018)
100 m²
New floor space in a conservation area from which Bexley asks for a design and access statement.
Source: Planning Application Requirements, London Borough of Bexley (document reviewed 17 October 2018)
4 areas
Conservation areas with Article 4(2) directions in Bexley: Brook Street, Old Bexley, Old Forge Way and Red House Lane.
Attic rooms
Works Bexley’s Old Bexley direction brings under council control at 4 to 14 North Cray Road and 99 to 115 Bexley High Street.
Source: Old Bexley Conservation Area Article 4(2) Directions (London Borough of Bexley)
153 to 283
Brook Street, Erith: house numbers covered by the direction, which controls enlargements and alterations to the dwelling.
Source: Brook Street Conservation Area Article 4(2) Direction (London Borough of Bexley)
£40 and £60
Bexley residential CIL per square metre in Zone 1 and Zone 2 when set in 2015, before annual indexation.
£30.30
Mayoral CIL per square metre for permissions granted in 2026 in Bexley, which is in band 3 (£25 when set in 2019). It applies only where CIL is due at all.
Source: Mayoral CIL: Annual CIL Rate Summary 2026 (London.gov.uk)
Questions about loft conversions in Bexley
Can I build a rear dormer under permitted development in Bexley?
Usually, if your house has its rights and is not on a named Article 4 list. In Old Bexley the direction names attic rooms, so we check the exact number first.
Does Bexley ask for a fire statement for a loft?
Its requirements document, last reviewed in October 2018, does not list one. We still note fire escape on the plans, because Building Regulations will ask.
Does Bexley want a roof plan?
It asks for roof plans where the validation officer needs them. A loft changes the roof, so we always include one.
Do I pay CIL on a loft in Bexley?
Rarely. CIL generally starts at 100 square metres of new floor area, and a loft inside the existing roof is usually well below that.
Find out what your Bexley loft needs
Send the address and a photo of the back of the house. We reply with the route and a fixed fee, from £475 drawings + £150 survey (£625 total).