Planning Permission in Barnet
Fixed-fee, MCIAT-chartered planning permission for Barnet homeowners — London Borough of Barnet validation and local constraints handled from the start.
Barnet's housing is dominated by interwar semi-detached suburbia across Finchley, Hendon and Edgware — homes ideal for hip-to-gable and dormer loft conversions and rear extensions, which frequently qualify as permitted development on semi-detached houses within the volume limits. But the borough also contains Hampstead Garden Suburb, one of the most tightly controlled residential areas in the country, so the correct route depends entirely on which part of Barnet you are in rather than on the house type alone.
Within the Suburb, an Article 4 direction removes almost all permitted development rights — one of the most far-reaching in London — and the Hampstead Garden Suburb Trust must also consent to external changes in parallel with the London Borough of Barnet. The borough's other conservation areas, Mill Hill, Monken Hadley, Totteridge and Finchley Church End, apply their own controls on 1930s semi character and front elevations, and the greens at Totteridge and Monken Hadley add further sensitivity. Elsewhere, Barnet's interwar semis usually retain permitted development rights for rear extensions and lofts.
We tailor Barnet applications to the specific area: straightforward permitted-development lofts and extensions across Finchley and Edgware, confirmed with a Lawful Development Certificate where they qualify, and carefully evidenced full applications within the Suburb and conservation areas. In the Suburb we handle both tracks — a design-led planning application to Barnet and the Trust's requirements — since approval there depends on respecting the Arts-and-Crafts character precisely. The fee is fixed and agreed up front, typically around 30% below an architect's charge for the same council-accepted drawings, with free redraws until Barnet approves. Drawing to the validation checklist, and turning drawings around in roughly seven days, keeps most householder applications inside the statutory eight-week determination, with the elevations and materials detail the council expects.
Planning in Barnet: what to know before you apply
The Hampstead Garden Suburb Article 4 direction is among the most far-reaching in London, controlling almost all external alterations and requiring Hampstead Garden Suburb Trust consent in parallel with planning. Elsewhere, Barnet's 1930s semis usually retain permitted development rights for rear extensions and lofts.
Typical Barnet housing stock
1930s semi-detached suburbia across Finchley, Hendon and Edgware, with the nationally significant Arts-and-Crafts housing of Hampstead Garden Suburb.
Areas we regularly draw for in Barnet
Finchley · Edgware · Hendon · Golders Green · Mill Hill · Chipping Barnet · Whetstone
What the numbers say about Barnet planning decisions
These are London Borough of Barnet’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 Barnet
Every householder application London Borough of Barnet decided over the four quarters to 2026 Q1.
| Householder applications decided | 1,439 |
|---|---|
| Granted | 1,183 |
| Refused | 256 |
| GrantedEngland average 90% | 82% |
| Of which prior approvalsPrior approvals are granted far more often than full applications, so this share moves the rate above | 18% |
| Decided within 8 weeksExcludes prior approvals. England average 93% | 97% |
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 Barnet
Larger householder extensions put to London Borough of Barnet under the prior-approval route, and lawful-development certificates decided, over eight quarters.
| Prior approval not requiredWent ahead without a full application | 364 |
|---|---|
| Prior approval granted | 30 |
| Prior approval refused | 210 |
| Granted where a decision was neededFrom 240 determinations | 12% |
| Building upwards, prior approval refused | 0 |
| Certificates of lawful development decided | 1,664 |
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 Barnet
Conservation areas London Borough of Barnet 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 | 16 |
|---|---|
| First designatedOf the 16 whose designation date the register records | 1,968 |
| Most recent designation | 2,011 |
| Article 4 directions in force | 15 |
Source: MHCLG Planning Data Platform. Open Government Licence v3.0 Extracted 2026-08-16.
If London Borough of Barnet refuses: appeal outcomes
Planning appeals against London Borough of Barnet determined by the Planning Inspectorate, 2021–2026. Enforcement notices and withdrawn cases are excluded.
| Appeals determined | 1,209 |
|---|---|
| Allowed | 430 |
| Dismissed | 779 |
| Householder appeals allowedFrom 502 householder appeals. England average 36% | 49% |
Source: Planning Inspectorate appeals casework. Open Government Licence v3.0 Extracted 2026-08-16.
Planning Permission for Barnet 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 Barnet
Planning Permission in Barnet — 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 a loft or extension in Barnet?+
What is different about building in Hampstead Garden Suburb?+
Is a hip-to-gable loft conversion allowed on my Barnet semi?+
How long does Barnet take to decide an application?+
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