Barnet approves 83.5% of householder planning applications

What are the odds in Barnet, on application and on appeal?

Barnet approved 83.5% of the 4,584 householder applications it decided, almost exactly the London figure. What sets it apart is the appeal record: the Inspectorate allowed 49.1% of the 927 Barnet householder appeals it decided, the second highest rate in London behind Hounslow.

Sources: decision and enforcement figures from MHCLG District Planning Application Statistics (PS1 and PS2), twelve quarters to March 2026; registers from the MHCLG Planning Data Platform, retrieved 1 September 2026; appeals from Planning Inspectorate casework decided 2016–2026. Barnet’s 3,215 tree preservation zones are the second highest count in London, and work to a protected tree without consent is a criminal offence under section 210 of the Town and Country Planning Act 1990.

Planning in Barnet — what you need to know

Barnet issued 2,585 certificates of lawful development in the three years to March 2026, against 4,584 householder decisions over the same period (MHCLG planning statistics, retrieved 1 September 2026). That is the largest certificate count of any London borough over the window, and it describes the place better than any policy summary: an outer-London suburb where most of what people want to build is already allowed, and where the useful question is not “will they let me” but “can I prove I did not need to ask”.

Suburban outer-London borough; permitted development used heavily; Hampstead Garden Suburb has its own residents' trust with additional design controls. The borough has a population of approximately 389,000 residents and covers postcodes N2, N3, N10, N11, N12, N14, N20, NW2, NW4, NW7, NW9, NW11, EN4, EN5.

The housing stock in Barnet is predominantly 1930s semi-detached dominates; Edwardian villas in Muswell Hill, Finchley; Garden Suburb Arts & Crafts in Hampstead Garden Suburb; post-war flats in Colindale. This mix of property types means that Barnet Council deals with a wide range of applications, from rear extensions on terraced houses to loft conversions on semi-detached properties and full refurbishments of period homes in conservation areas.

With 20 designated conservation areas and no current Article 4 Directions, Barnet has a planning environment that balances heritage protection in conservation areas with generally permissive policies elsewhere.

We work every Barnet postcode, from Hampstead Garden Suburb and Finchley out to Mill Hill, Edgware and High Barnet, preparing planning drawings and building regulations drawings. Knowing one council's design guidance properly is worth real money, because Barnet's refusals concentrate on the same short list of points year after year rather than on anything novel.

Where do Barnet’s 48 Article 4 areas apply?

Loft conversions, rear extensions and outbuildings are not caught by any borough-wide Article 4 Direction here. Barnet has not made one over ordinary householder permitted development, so the national limits in the GPDO are what apply — subject, always, to whatever was written into the consent when your street was first built out.

So a good share of ordinary home improvement in Barnet needs no application whatsoever, as long as the work keeps inside the national ceilings on height, footprint and position. We would take one out anyway: a Lawful Development Certificate costs £274. You are not asking permission and none is being given; the council is issuing a document that says the work was lawful, and the person who will most want to see it is a buyer's solicitor six years from now.

Even without Article 4 Directions, properties in Barnet's 20 conservation areas have additional restrictions on permitted development. We check the specific restrictions affecting your property as part of our initial assessment.

How many conservation areas does Barnet have?

Barnet has 20 designated conservation areas. Notable conservation areas include:

• Hampstead Garden Suburb
• Mill Hill
• Hendon
• Golders Green
• Monken Hadley

Designation narrows what you can do without asking first. Barnet's twenty conservation areas sit over a stock that is overwhelmingly interwar — 21.2% of the borough's 160,460 homes went up during the 1930s alone, on the VOA record at 31 March 2025 — and the controls exist to keep those frontages coherent. Inside a designated area, expect these to be withdrawn or narrowed:

• No cladding, stone, artificial stone, pebble dash, render, timber, plastic, or tile to any external wall without planning permission
• No side extensions under Permitted Development
• Rear extensions are limited and may require planning permission
• Dormer loft conversions facing the highway require planning permission
• Satellite dishes on front elevations or chimneys are not permitted
• Demolition of gates, walls, fences, or other boundary treatment requires planning permission

Twenty conservation areas is modest for London, and in Barnet the tighter control is often not a conservation designation at all. Hampstead Garden Suburb is administered by its own trust under a Scheme of Management, so a Suburb address needs the trust's consent as well as the council's, judged against its own design rules and on its own timetable. We establish which of the two regimes applies before a single drawing is started, because a scheme that satisfies the conservation officer and fails the trust is not consented.

Popular projects in Barnet

The interwar semi-detached stock that fills Finchley, Edgware and Colindale drives the caseload, and it produces one lopsided statistic. Under the neighbour-consultation scheme for larger rear extensions, Barnet told 539 applicants that prior approval was not required, granted 44, and refused 352 (MHCLG planning statistics, retrieved 1 September 2026). So the scheme mostly ends in a build — but once a neighbour actually objects, roughly one in nine still gets through, and on a semi the neighbour who objects is the one sharing your wall.

Two-storey extensions

Barnet's semis and detached houses take a two-storey rear extension more comfortably than most London stock, and almost none of them qualify as permitted development at that scale. The usual gain is a kitchen-dining room below and a bedroom with an en suite over it. Officers approve them where the addition reads as secondary to the original house, is set in from the flank boundary, and does not take light or outlook from the neighbour — daylight measured from their nearest habitable window is what catches most of the schemes that fail.

Flat conversions and internal alterations

Mansion blocks and converted flats make up a real share of the borough's stock, so internal reconfiguration and flat conversion come up constantly. Internal alterations on their own rarely need permission. Splitting a single house into flats, or crossing the C3 to C4 boundary into a house in multiple occupation, is a change of use and generally does. Barnet decided 336 change-of-use applications in the three-year window and granted 157, a little under half, where London as a whole granted 59.3%. This is the part of the system where refusal is genuinely likely rather than merely possible, and we prepare the plans, elevations and supporting statements those applications need.

How much do planning drawings cost in Barnet?

Two fees, and in Barnet the cheaper one is the one most people end up paying. A householder application costs £548 and a lawful development certificate £274; set the certificate fee against the 2,585 certificates the council issued in three years and you can see which route this borough actually runs on. Our drawing fee is fixed in writing before we start, at around 30% below typical London architect rates for the same scope.

Send a surveyor first. A measured survey is where a Barnet job starts, and a submission the council validates first time is where it stops: the building as it stands, the building as you want it, every elevation, and a site plan, all at the scales the portal expects. Expect to pay about a third less than a London architectural office charges for that identical scope.

There are two kinds of Lawful Development Certificate and the difference matters. The proposed-works version is obtained before you build and confirms the scheme is permitted development; the existing-works version regularises something already standing. Barnet's certificate volume is the highest in London, so the proposed form is very much the local norm - and it is the one that protects a sale years later.

Our experience in Barnet

We cover all Barnet postcodes: N2, N3, N10, N11, N12, N14, N20, NW2, NW4, NW7, NW9, NW11, EN4, EN5. Whether your property is in a conservation area, affected by an Article 4 Direction, or in an unrestricted residential street, we have experience with Barnet Council and understand the borough's planning policies.

Our chartered technologists — MCIAT, which is not a title anyone can simply adopt — draw both the planning set and the regulations set for houses throughout Barnet. We run it end to end: surveyor on site, drawings, submission, then the correspondence with Barnet Council afterwards, including the officer's near-inevitable request for one more section.

We also work in Barnet's neighbouring boroughs:

What are the odds of approval in Barnet?

83.5%of householder applications approved in Barnet

4,584householder decisions in three years

91.8%decided within eight weeks

2,585certificates of lawful development issued

Barnet is the London average, almost to the decimal. 4,584 householder decisions, 3,828 approvals, 756 refusals: 83.5% granted where the 33 boroughs together manage 83.0%. There is no local bias to plan around and no local leniency to lean on, which leaves the whole weight of the outcome on the scheme and the drawings. One qualification, and it matters if you were counting on permitted development: this council is a heavy refuser on the prior-approval route specifically. Source: MHCLG live planning statistics

91.8% of Barnet's householder decisions landed inside the statutory eight weeks, against 92.5% for London as a whole. Neither number is remarkable, and the practical reading is that eight weeks is a reasonable working assumption here without being a promise. Note also that 1,076 of the 4,584 householder decisions sat under an agreed extension and are excluded from that calculation altogether.

Barnet refuses larger rear extensions under prior approval far more often than London does. Of 935 determinations under the neighbour consultation scheme, 352 came back refused: 37.6%, where the 33 boroughs together refuse 24.9%. Most of the remainder, 539, were told prior approval was not required, and 44 were granted outright — so roughly three in five householders could build and nearly two in five could not. A neighbour writing in is what turns that decision. If your rear boundary is tight, designing inside the ordinary permitted development envelope, or going straight to a full application with daylight calculations attached, tends to cost less than staking £249 and eight weeks on the mood next door. Source: MHCLG live planning statistics

Barnet recorded 2,585 certificates of lawful development across the same period. That is a large number for one borough, and fair evidence that homeowners here already use the route. Weigh the £274 certificate against the £548 that a householder planning application costs and the arithmetic makes its own case. One proves you needed nothing; the other asks for something.

Every count below comes from what Barnet itself submitted to MHCLG on the quarterly planning returns, PS1 and PS2. They cover what the council determined from April 2023 through to the close of March 2026; the date a case arrived does not enter into it, only the date it was decided. Contains public sector information licensed under the Open Government Licence v3.0

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