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Croydon, London

Garage conversion plans in Croydon

Garage conversion plans for a Croydon house start at £695 including VAT. Most Croydon households live in houses, so a garage is a natural source of extra space, and the planning question usually comes down to whether your road is inside a conservation area.

From £695 (VAT included)

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    Two-storey rear extension under construction on a semi-detached house

    Croydon's conservation areas and a garage conversion

    Croydon publishes 19 conservation areas, and its Conservation Areas General Guidance SPD sets out what the council expects of changes within them. We found no figure in the council's guidance aimed at garages, so a conversion outside a conservation area is judged on general design policy, and inside one the area guidance is the starting point.

    That makes the address the first fact to establish. If you are outside every designation and the garage has no restricting condition, converting the inside can be done without an application. If you are inside one, the garage door opening is part of a front the council cares about, and the new window, brick and sill line need to be drawn to the area's character.

    Historic England lists 180 entries in the borough, and a listed house needs listed building consent for most external changes.

    House extension under construction with scaffolding, new glazed doors and building materials

    Local figures for Croydon

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Conservation areas19 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries180 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Households living in a house60.2 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Green Belt share of the council area25 % of council area covered by green-belt polygons—planning.data.gov.uk
    Householder decisions786 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted86.6 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time94.4 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Lawful development certificate applications (PS1)494 certificates2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Class A, condition A.3(a)Exterior materials must be of similar appearance to the existing house (conservatories excepted)—legislation.gov.uk
    Approved Document F Vol 1 2021, Table 1.1Intermittent extract: kitchen 30 l/s with cooker hood (60 l/s otherwise), utility 30 l/s, bathroom 15 l/s, WC 6 l/s—gov.uk
    Approved Document L Vol 1 2021 incl. 2023 amendments, Table 4.2New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4—gov.uk

    A blank value means the figure has not been published, not that there are none. Check your own address with the council.

    Councils bordering Croydon
    Building regulations, layer by layerPart A: structure: Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments. Part B: fire safety: All dwellings: fire detection and alarm system minimum Grade D2 Category LD3 (BS 5839-6), mains-operated smoke alarms to BS EN 14604. Part L: insulation: New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4. Part K: stairs: 2.0 m clear headroom over stairs. Full plans application: Building control body must decide a full plans application within 5 weeks, or longer if agreed in writingPart A: structurePart B: fire safetyPart L: insulationPart K: stairsFull plans applicationABCDE

    Building regulations, layer by layer

    The Approved Documents that shape most house projects, from structure to the application itself.

    A · Part A: structure
    Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments
    B · Part B: fire safety
    All dwellings: fire detection and alarm system minimum Grade D2 Category LD3 (BS 5839-6), mains-operated smoke alarms to BS EN 14604
    C · Part L: insulation
    New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4
    D · Part K: stairs
    2.0 m clear headroom over stairs
    E · Full plans application
    Building control body must decide a full plans application within 5 weeks, or longer if agreed in writing

    A borough of houses with space around them

    About 60.2 per cent of Croydon households live in a house or bungalow, and the national land-use survey found domestic gardens covering 32.8 per cent of the borough's land. Where a plot has a drive and a garage set beside the house, the conversion is usually the simpler kind.

    A side-access garage often links to the hall or kitchen with a short opening, so the internal connection is simple. A rear garage reached by a long drive is a different job, usually closer to a separate outbuilding than a conversion, and we say so before you pay.

    Green belt and shared houses

    About 25 per cent of the borough is green belt. A conversion adds no footprint, but a garage joined to the house by a new extension can, so we check whether the green belt tests apply to a combined scheme.

    Croydon also has an Article 4 direction on small shared houses. If the new room is for a tenant rather than the family, tell us early, because that is a different use and a different route.

    How Croydon decides householder applications

    Croydon decided 786 householder applications in its latest published year and granted 86.6 per cent, with 94.4 per cent decided within eight weeks or an agreed extension.

    For larger home extensions under prior approval, the council granted 17 and refused 34 in the latest statistics year. It also dealt with 494 certificate applications, so a Lawful Development Certificate in Croydon is a familiar way to settle the question in writing.

    What the technical set covers

    Building Regulations approval is needed in every case. The ventilation rule is: Intermittent extract: kitchen 30 l/s with cooker hood (60 l/s otherwise), utility 30 l/s, bathroom 15 l/s, WC 6 l/s. The energy rule is: New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4.

    The section shows the new floor build-up and the wall lining, and the elevation shows the new window and the materials. The national rule on the outside is: Exterior materials must be of similar appearance to the existing house (conservatories excepted). Our building regulations drawings in Croydon put this on one set for the builder. Where an application is needed, the council fee is £548, and our planning drawings in Croydon carry it.

    What we need, what you receive and nearby boroughs

    Send us the decision notice for the house if you have it, a photograph of the front and a note of who will use the room. We survey the garage on one datum with the house, show you options in plan and agree the design in writing. Sheets are normally ready about a week after the survey, and a second chartered technologist checks each one.

    Garage conversion plans in Croydon start at £695 with VAT included, fixed before you commit. If the council asks for changes, we redraw at no charge until approval.

    For the borough as a whole, see architectural drawings in Croydon. Next door, compare Bromley, Sutton and Merton, or read the overview of garage conversion plans.

    What you receive

    Building regulations section drawing showing the construction build-up
    Sample drawing. Building regulations section showing construction build-up for a building control check.
    Upper floors of a large yellow-brick Victorian house in London with chimney pots
    Unit by unit
    Move up and down — the nearest units slide out.

    Questions

    Do I need planning permission to convert a garage in Croydon?

    Not always. Outside conservation areas, with no restricting condition and no change to the outside, it may need none. Inside one of Croydon's 19 conservation areas, changes to the front can need an application.

    Does Croydon have a rule on garage conversions?

    We found no garage-specific figure in its guidance. Conversions are judged on general design policy, and on the Conservation Areas General Guidance SPD inside a conservation area.

    How much do garage conversion plans cost in Croydon?

    From £695 including VAT, fixed up front. A council fee is paid to the council separately where an application is needed.

    Can I let a converted garage room to a tenant?

    Croydon has an Article 4 direction on small shared houses, so letting rooms to several tenants can need permission. Tell us early and we will check.

    Sources and dates

    City of London skyline glowing at dusk across the Thames under a dramatic orange sky

    Tell us about your property.

    We check the constraints, then send a fixed fee. Messages before 3pm get a reply the same working day.