Loft conversion in Chadwell Heath
A loft conversion in Chadwell Heath is usually a rear dormer, and it can be permitted development if it adds no more than 40 cubic metres to a terraced house. Barking and Dagenham granted 66% of its 388 householder decisions in the latest four quarters. Our dormer drawings start at £695.
Fixed fee from £495 drawings + £200 survey (£695 total) · all prices
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What a Chadwell Heath terrace can add without an application
Class B of the General Permitted Development Order allows roof additions of 40 cubic metres on a terraced house, with a larger allowance for other houses. The roof enlargement must also sit back at least 0.2 metres from the eaves, measured along the slope.
The volume is counted from the original roof, so an earlier extension by a previous owner can use up part of it. Our guide to planning permission for a loft conversion lists the other Class B conditions, including the rule against dormers on a roof slope facing the road.
One in three householder decisions is not a grant
Most of Chadwell Heath is in Barking and Dagenham, but RM6 crosses into Redbridge, so check which council covers your address first. Our analysis of the MHCLG planning application statistics (table PS2) shows Barking and Dagenham granted 66% of its 388 householder decisions in the latest four quarters. About one in three was not a grant, so a loft that needs a full application deserves a careful design.
Speed is not the problem. By the same analysis, 100% of householder decisions, excluding prior approvals, came within eight weeks. The risk sits in the design, not the queue.
Our analysis of the MHCLG Planning Data Platform lists 4 conservation-area entries for Barking and Dagenham on the national register.
If the council refuses, how appeals have gone
Our analysis of the Planning Inspectorate casework database counts 166 householder appeals decided for the borough between 2021 and 2026, and 30% were allowed. That is a record, not a forecast. Most householder appeals here upheld the council.
A refused dormer is normally quicker to redraw, with a smaller box or a deeper set-back, than to take to appeal. Our planning appeal guide explains the timetable.
Proving a permitted loft with a certificate
Our analysis of the same statistics (table PS1) shows the council decided 688 certificates of lawful development over the eight quarters to mid-2026. A buyer's solicitor may ask for one, because it confirms in writing that a dormer was lawful.
Whether you need a certificate is covered in our lawful development certificate guide.
Designations around RM6
Our analysis of the MHCLG Planning Data Platform lists 4 conservation-area entries for Barking and Dagenham on the national register. For the RM6 area, our analysis finds 1 Article 4 direction entry on the register, which is a lower bound because the register is incomplete.
Neither count is proof for your road. Check the council's own planning map before you design, because an Article 4 direction can remove the dormer rights described above.
Drawings and fees for a Chadwell Heath loft
A rear dormer drawn to Class B starts at £695, and an L-shaped dormer starts at £745. Drawings come back in 7 days, with free redraws until approval.
If you are weighing a mansard instead, see our mansard drawings for Barking and Dagenham. Room layouts are on the floor plans page for the borough.
Sources
Every figure on this page, where it comes from and a link to the original.
| Figure | Source | Link |
|---|---|---|
| £695 | DrawingsDirect starting fixed fee for rear dormer loft conversion permitted development drawings, from the published price list | drawingsdirect.co.uk |
| £745 | DrawingsDirect starting fixed fee for L-shaped dormer loft conversion permitted development drawings, from the published price list | drawingsdirect.co.uk |
| 40 cubic metres | GPDO 2015 Sch 2 Pt 1 Class B.1(d)(i): roof additions may add up to 40 cubic metres to the roof space of a terrace house (source wording: "40 cubic metres in the case of a terrace house") | www.legislation.gov.uk |
| 0.2 metres | GPDO 2015 Sch 2 Pt 1 Class B.2(b): a roof enlargement must be set back not less than 0.2 metres from the eaves, measured along the roof slope (source wording: "not less than 0.2 metres from the eaves") | www.legislation.gov.uk |
| 388 | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 66% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 100% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 166 | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 30% | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 4 | Our analysis of MHCLG Planning Data Platform conservation-area and article-4-direction datasets (bulk snapshot retrieved 14 Aug 2026) | www.planning.data.gov.uk |
| 688 | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 1 | Our analysis of MHCLG Planning Data Platform article-4-direction-area dataset (entity API, retrieved 15 Oct 2026) | www.planning.data.gov.uk |
Questions people ask
Do I need planning permission for a loft conversion in Chadwell Heath?
How much does a dormer loft conversion drawing cost?
Is Barking and Dagenham strict on loft extensions?
Photographs: GRALISTAIR (CC BY-SA 4.0); GRALISTAIR (CC BY-SA 4.0).
