Planning Permission in Croydon
Fixed-fee, MCIAT-chartered planning permission for Croydon homeowners — Croydon Council validation and local constraints handled from the start.
Croydon is one of London's largest boroughs by population, running from the dense Victorian and Edwardian terraces of Thornton Heath, South Norwood and Addiscombe up to the generous interwar semi-detached and detached houses of Purley, Sanderstead and Coulsdon on the southern hills, with town-centre flats and larger homes in between. That range means the right project varies widely — a compact side-return in Addiscombe is a different exercise from a substantial double-storey extension on a large Purley plot — and the sloping sites across the southern hills further shape how an extension or lower-ground scheme is designed.
The suburban semis and detached homes toward Purley and Sanderstead often retain fuller permitted development rights than inner-London terraces, so larger rear and double-storey extensions can qualify, with the limit usually design and amenity policy rather than space. That said, the conservation areas of Addiscombe, South Norwood, Park Hill, Upper Norwood, Waddon and Sanderstead tighten design control where they apply, and Croydon's HMO Article 4 directions remove permitted development for change of use to an HMO (C3 to C4) in designated wards. We take a validation-first approach, checking the permitted development limits for your semi-detached or detached home — and confirming eligibility with a Lawful Development Certificate where it qualifies — before drawing.
We prepare Croydon planning drawings that use the available plot fully while respecting conservation control, producing the same council-accepted drawings an architect would across Croydon, Purley, Thornton Heath, Norbury and Coulsdon — usually at around 30% less. The fee is fixed and agreed up front, drawings typically turn around in about seven days, and we redraw free until Croydon approves. Most householder applications are determined within the statutory eight-week period once validated, so for a large borough spanning terraces to suburban plots a complete, correctly scaled submission to the council's checklist is the best way to avoid a validation query.
Planning in Croydon: what to know before you apply
Croydon applies Article 4 directions to HMO conversions in designated wards and controls office-to-residential change of use in parts of the town centre, alongside conservation-area design control in Addiscombe, South Norwood and Upper Norwood. The suburban semis and detached homes toward Purley and Sanderstead often retain fuller permitted development rights than inner-London terraces — we confirm before drawing.
Typical Croydon housing stock
Interwar semi-detached suburbia across Purley, Sanderstead and Shirley, Victorian and Edwardian terraces through Thornton Heath, South Norwood and Addiscombe, and town-centre flats and larger detached houses toward the southern hills.
Areas we regularly draw for in Croydon
Croydon · Purley · Thornton Heath · South Norwood · Addiscombe · Sanderstead · Coulsdon · Norbury
What the numbers say about Croydon planning decisions
These are Croydon Council’s own reported figures, published by government rather than estimated by us. They are what we design against — a borough that refuses one householder application in five needs a different drawing package from one that refuses one in twenty.
Householder decisions in Croydon
Every householder application Croydon Council decided over the four quarters to 2026 Q1.
| Householder applications decided | 805 |
|---|---|
| Granted | 703 |
| Refused | 102 |
| GrantedEngland average 90% | 87% |
| Of which prior approvalsPrior approvals are granted far more often than full applications, so this share moves the rate above | 34% |
| Decided within 8 weeksExcludes prior approvals. England average 93% | 95% |
Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-08-16.
Permitted development in Croydon
Larger householder extensions put to Croydon Council under the prior-approval route, and lawful-development certificates decided, over eight quarters.
| Prior approval not requiredWent ahead without a full application | 155 |
|---|---|
| Prior approval granted | 143 |
| Prior approval refused | 56 |
| Granted where a decision was neededFrom 199 determinations | 72% |
| Building upwards, prior approval refused | 5 |
| Certificates of lawful development decided | 1,062 |
Source: Ministry of Housing, Communities and Local Government (PS1 district planning application statistics). Open Government Licence v3.0 Extracted 2026-08-16.
Designated areas in Croydon
Conservation areas Croydon Council has published to the national register, and when it designated them. Where a borough has supplied no Article 4 data the row is omitted rather than shown as zero.
| Conservation areas on the register | 20 |
|---|---|
| First designatedOf the 9 whose designation date the register records | 2,006 |
| Most recent designation | 2,008 |
Source: MHCLG Planning Data Platform. Open Government Licence v3.0 Extracted 2026-08-16.
If Croydon Council refuses: appeal outcomes
Planning appeals against Croydon Council determined by the Planning Inspectorate, 2021–2026. Enforcement notices and withdrawn cases are excluded.
| Appeals determined | 1,045 |
|---|---|
| Allowed | 260 |
| Dismissed | 785 |
| Householder appeals allowedFrom 289 householder appeals. England average 36% | 40% |
Source: Planning Inspectorate appeals casework. Open Government Licence v3.0 Extracted 2026-08-16.
Planning Permission for Croydon homes: the package and the process
A householder application is refused validation far more often than it is refused permission, and almost always for the same reasons: a location plan at the wrong scale, no red line around the application site, a missing ownership certificate, or elevations that do not show every face of the building affected. We prepare the full submission set — location plan, block plan, existing and proposed floor plans, elevations and sections — so the case officer receives a complete case on day one.
Once the application is live we stay on it. Officers routinely come back with questions about materials, boundary treatment or a dimension they cannot read off the drawings, and a fast, drawn answer is usually the difference between a decision inside the statutory period and a request to withdraw and resubmit.
Which route applies is decided by the building before it is decided by policy. A house that has never been extended usually has allowances left to use; a flat, a listed building or a home in a conservation area often has none, and the same drawing set then has to make a design case rather than a compliance one.
Do I need planning permission for an extension in London?
Many single-storey rear extensions, loft conversions and outbuildings fall under permitted development rights and do not need a full planning application — but London's dense housing stock, conservation areas and Article 4 directions frequently withdraw those rights. Before you pay for a full application, we check your property against the current permitted development thresholds and your borough's local constraints.
Where permitted development applies, we recommend a Lawful Development Certificate instead of full planning — it is faster, cheaper and gives you a legal document confirming the work was lawful. Where a full application is genuinely required, we prepare it properly the first time.
Permitted development vs a full planning application
Permitted development lets you build within defined volumetric limits without committee review. A full householder application is assessed against the borough's local plan for scale, daylight, neighbour impact and design. We advise which route your project qualifies for and why.
Article 4 directions and conservation areas
If your home sits in a conservation area or under an Article 4 direction, permitted development rights are often removed — meaning even modest changes need consent. Each borough page lists the local directions and conservation areas we routinely design around.
How do you apply for planning permission through the London Planning Portal?
We manage the full lifecycle of your submission — survey, drawings, supporting documents and officer liaison — so you never have to decode a validation checklist yourself.
Phase 1 — existing and proposed site surveys
A laser-measured survey captures your property exactly, so existing and proposed drawings match reality millimetre for millimetre.
Phase 2 — technical drawing package
Site location plan, block plan, floor plans, elevations and sections drawn to your borough's scale and formatting requirements, with a design and access statement where needed.
Phase 3 — liaison with the planning officer
We answer the council's queries, negotiate amendments, and redraw free until the decision lands.
How long does planning permission take, and what does it cost?
Drawings are typically ready within 7 days of survey. Your council then has a statutory 8 weeks to decide a householder application. Our drawing fees are fixed and quoted upfront — the table below shows typical packages.
| Package | Production window | Compliance layer | Typical fee |
|---|---|---|---|
| Permitted Development pack | 7–10 working days | Lawful Development Certificate submission | £950–£1,450 |
| Full Planning pack | 10–14 working days | Council liaison & design statement | £1,600–£2,400 |
| Planning + Building Regs pack | 14–21 working days | Structural calculations included | £2,200–£3,850 |
Planning Permission across Croydon
Planning Permission in Croydon — FAQs
How long does it take to get planning permission from a London council?+
What happens if the council refuses?+
Do you cover my borough?+
Is the fee really fixed?+
Do I need planning permission for an extension in Croydon?+
Can I build a larger extension on a Purley or Sanderstead plot?+
What do Croydon's HMO Article 4 directions mean for me?+
How long does Croydon Council take to decide?+
How much do planning drawings cost in Croydon?+
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Tell us your Croydon address and ambition — we'll confirm feasibility, local constraints and a fixed fee within one working day.