Loft Conversion planning permission examples — what gets approved & refused
163,619 real decisions from 282 UK councils. See what actually gets approved, what gets refused, and why — so you don’t waste thousands on drawings for something your council will reject.
Last updated: September 2026
Category-level approval rates for these examples are currently withheld while we re-check how decisions are sorted into project types. Each decision below is a real record from the council’s own planning portal and links to it. Council-level approval rates are unaffected and remain on the council pages.
That means roughly 1 in 5 loft conversion applications are refused — often due to avoidable design issues.
163,619
Decisions
132,668
Approved
30,951
Refused
282
Councils
Loft conversions are one of the most effective ways to add space and value. From simple Velux windows to full rear dormers and mansard conversions, outcomes vary by type and location.
What these results show
⚠️ These are national examples. Your council could be stricter — or more lenient. See what actually gets approved on your street →
Real loft conversion decisions
Real examples showing what works — and what gets refused. Use the filters to compare approved and refused applications.
Approved
LISTED BUILDING CONSENT: Replace existing pitched roof with Welsh slate and lead flashing, replace flat roofs and cheeks of dormers with single ply membrane and Welsh slate, repair chimneys and install cowls to redundant stack, repair/ replace timber fascia boards to dormers and replace rainwater go
Approved
Certificate for Lawfulness for proposed replacement of all windows with like for like UPVC with enlargement of living room windows, existing bedroom windows enlarged and juliet balconies added, changes to attic window opening, additional velux to attic room, replace existing velux with dormer window
24/0127/HHOPDC
Approved
Loft conversion with rear dormer and 2 front skylights; 3m single-storey rear extension with a flat roof; and 2.5m single-storey outbuilding.
Refused
NON MATERIAL AMENDMENT TO APPLICATION 2022/0556/HHA (DOUBLE GARAGE EXTENSION WITH HOME OFFICE ANNEXE ABOVE AND SEPARATE OAK FRAMED CAR PORT - RESUBMISSION OF PLANNING APPLICATION 2021/0809/HHA) - TO REDUCE EXTENSION FOOTPRINT, REPLACEMENT OF LEAN TO STRUCTURE WITH OPEN STORAGE AREA WITH FLAT ROOF, R
Approved
Prior notification application for the removal of existing pitched roof and replacement with a Mansard/Flat Roof structure and a roof terrace to create 1no. additional 3 bed flat with solar panels on the top of flat part of the roof.
Approved
Demolition of Existing 2 No. Dormer Windows and Part of the Roof Construction above the Rear Loggia Area. Raising the Rear Elevation above the Loggia Area to Create Enlarged Room Areas and Complete the Construction of a New Pitched Roof and Flat Roof.
Approved
Certificate of lawfulness (Proposed): Erect a single-storey rear extension, and conversion of loft space to form living accommodation involving the insertion of dormer windows to rear and roof lights to the front of existing dwelling
Approved
Remodel roof to provide first floor dormer accommodation, extend kitchen, internal alterations and pitched roofs to replace flat roofs.
Approved
Capping of existing stone copings with leadwork to front gable; installation of replacement conservation roof light and replacement timber window to rear dormer
Approved
Application for Listed Building Consent - Demolition of existing lean to extension and erection of single-storey rear extension, addition of 1st floor bathroom and the updating of the existing modern dormers and new fenestration.
Refused
Proposed extension and alterations to the existing single storey flat roof double garage on plot, for the creation of a home office space, including new pitched roof construction, dormer windows and minor external works including stair access
Approved
Erection of pitched roof over existing flat-roof extension to rear, 1 no. new dormer window, 2 storey extension to existing single storey off-shot, external stair and railing to rear ground floor, alterations to front and rear boundary treatments,...
Approved
Minor material amendment to planning permission 18/P/2649/FUL (alterations to existing conference rooms, restaurant and bar area to create 12no. bedrooms on ground floor and erection of first floor extension above with a further 12no. bedrooms (24no. in total). Alterations to existing roof and incre
Approved
Annexe extension to side of dwelling with attic room, kitchen extension at rear, dormer to main roof at front and removal of existing garage and canopy
Approved
Enlargement of existing dormer windows, render to existing brickwork and installation of new windows
Approved
The application seeks to confirm that an existing development consisting of a two-storey rear and single storey front extension (including the formation of a first floor balcony with walk-through velux windows and two triangular shaped roof dormers) constructed at 140 Joel Lane, Hyde, SK14 5LN is la
Approved
Remove existing 30 degree pitch roof and add new 45 degree pitch roof to incorporate loft rooms with flat roof dormer to the rear elevation
Approved
Conversion and extension of existing outbuilding, construction of three car garage with gym above and construction of new three bedroom dormer bungalow and associated works.
Approved
Remove epicormic growth from Oak Tree (T1) up to approx. 8m. Remove lowest limb growing towards dormer (due to proximity to house). Remove lowest limb from Oak Tree (T2) Remove epicormic growth. Remove lowest 2 limbs from Oak Tree (T3) overhanging garden. (TPO P1/201/320 / Pirbright Conservation Are
Approved
Single-storey extension to rear of existing dwelling to provide porch, utility and pantry; conversion of existing roof space including rear dormer to provide additional bedrooms and minor alterations to existing window openings, all designed to comply fully with the permitted development rights outl
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You’re looking at national data. 19% of loft conversion applications get refused — but that number could be higher or lower in your area.
See what gets approved near your home →
Refused
Non Material Amendments to planning permission 2022/0335/FUL - Remove first floor rear outrigger extension. Reduce projection of ground floor extension. Remove dormer to front elevation and replace with Velux rooflight. Remove external chimney stack. Remove brick plinth. Remove side window to utilit
Refused
Non-material amendment of Condition 16 of 16/00708/FUL for the creation of additional third storey to original plot numbers 3 to 6 as shown on drawing number 7066 P 02 to form additional bedroom, a new dormer window to the front, and two roof lights to the rear. Plots to be renumbered 1 to 4.
Approved
Double storey side extension, single storey rear extension and rear roof dormer extension.
Approved
Increase in vacant pub roof height and construction of a first floor side extension together with insertion of dormer windows to both sides of rooftop to facilitate the conversion of the building into 7 x 1 bed flats, demolition of existing garages, a single storey extension to existing vacant comme
Approved
Details of condition 2 (external materials) of existing application 2023/1426 (Demolition of existing garages and erection of new, side extension and addition of dormer windows in existing roof) dated 26/07/2023
Approved
Residetnial development:- erection of detached dormer bungalow (reserved matters
Approved
Erect single storey side extension, increase height of roof to form habitable accommodation and erect dormer windows to side (amended proposal)
Approved
Certificate of Lawful Development for proposed conversion of loft space to create 2 new bedrooms including new dormer to the rear and rooflight to the front and internal alterations
Approved
Application under Section 96A of the Town and Country Planning Act 1990 (as amended) for a Non-Material change to a planning permission APP/20/01270: The change of materials and window design to the dormer, from zinc cladding to render as per...
Approved
Details of condition 2 (external materials) of existing application 2023/1426 (Demolition of existing garages and erection of new, side extension and addition of dormer windows in existing roof) dated 26/07/2023
Approved
Replacement and realignment of roof, addition of dormer, new entrance to dwelling, addition to existing extension and replacement conservatory, Tottiford Farm, Bovey Tracey.
23/00917/NMA
Approved
Non-material amendment sought to planning permission ref 20/01092/FUL for installation of 2 high level velux windows within dormer window
Approved
Non-Material amendments to planning permission P19/3313/F to replace the front dormer with 2 no. rooflights, amend the rear extension wall and include cladding and to omit the external expressed timber frame detailing on the proposed garage.
Approved
Alterations to Roof Terrace, Including Installation of Railings and Alteration to Existing Roof Dormer
Approved
Certificate of Lawfulness of Existing Development for a dormer loft conversion to the rear of the property with two standard windows to the rear and two roof lights to the front
25/01295/CLP
Approved
Proposed loft conversion of existing private dwelling house to form new bedroom, new bathroom and installation of new staircase.
Approved
Lawful Development Certificate (Proposed) for a single storey rear extension, a rear facing dormer and the installation of roof lights.
10/01600/NMA
Refused
Erection of dwellinghouse, formation of vehicular access and installation of septic tank (non-material amendment to planning permission 08/00611/DET incorporating change to design of dormer windows, formation of large pitched roof, enlargement of rear wing and reduction of car port size, alteration
Refused
Remove and replace roof slates with new, erection of rear dormer and conversion of attic to create office space.
Refused
Removal of dormer roof and construction of new first floor level incorporating a flat roof design.
APP/2013/0028
Approved
Non material amendment - repositioning of dormer and rooflight window and addition of further rooflight (In relation to APP/2012/0483).
Approved
Retrospective application for loft Conversion to create 3 additional bedrooms
Approved
Certificate of Lawfulness for proposed removal of hip roof, Erection of roof dormer to the rear.
Approved
Erection of oak framed balcony and french doors with small roof dormer above.
Approved
Lawful Development Certificate For A Proposed Development: Proposed Loft Conversion, Addition Of 3 Roof Lights
Refused
Adapt roof pitch, installation of patio doors on the front elevation, and installation of dormer within the roof slope
Refused
Retrospective Conversion and reuse of first floor of existing approved garage from storage to tourist accommodation and associated works to include 1 no. dormer window and 1 No. other window
Refused
Single and two storey extension to dwellinghouse; and formation of dormer windows
Refused
Removal of approved loft conversion application number 1/0373/2024/FUL and construction of a new first-floor extension over approved single storey side extension
Approved
Alterations to previously approved planning consent DM/2021/01296: Two additional dormers located on front elevation.
09/01108/APP
Approved
Alterations and dormer extension to dwellinghouse and erection of garage
Approved
Alterations to dwelling - re-position of rear dormer windows
Approved
Certificate of lawful development for a proposed rear dormer
Refused
Certificate of Proposed Lawful Development for the change of use from a dwellinghouse (C3) to HMO (C4) and addition of rear dormer
09/198/PPF
Refused
Extend a house, install a dormer window, demolish outbuilding to form courtyard and fell mature tree
Refused
Proposed hip to gable roof conversion with ridge raise, front and rear dormers and ground floor conservatory link extension
Refused
Erection of two bedroom dormer bungalow to rear garden
Refused
Proposed front dormer window to dwelling and retrospective garden room (amended proposal description).
Refused
Erection Of 1no. Dormer Bungalow (Revised Application)
12/01655/LBC
Refused
Alterations and installation of two dormer windows
Related guides
Loft conversion planning rules explained Do I need planning permission for a dormer window?Before you spend £2,000+ on drawings — and risk getting refused
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