A third of N1 is not in Islington
N1 is routinely treated as the Islington postcode, and for two thirds of it that is right. But 32.5% of N1 households, more than 15,000 of them, are in Hackney, and a further 1.5% are in Camden. Hoxton East and Shoreditch, Hoxton West and De Beauvoir are Hackney wards. Barnsbury, Canonbury, St Mary's and St James', St Peter's and Canalside, Caledonian, Laycock and Mildmay are Islington.
For most purposes that distinction is invisible. It stops being invisible the moment a fault turns out not to be yours. Council housing repairs, HMO licensing, environmental health, highway drainage and the freeholder of an ex-council block are all borough functions, and N1 has three boroughs in it. A tenant on Hoxton Street and a tenant on Upper Street have the same postcode district and two different landlords of last resort.
This is the clearest case in this pilot for a postcode page existing at all. Neither the Islington page nor the Hackney page describes N1, because each stops at its own boundary, and the boundary runs straight through the middle of the district.
Household counts are Census 2021, aggregated from the 2021 Output Areas that N1 postcodes fall in. Percentages may not total exactly 100 because of rounding.
How N1 compares with the boroughs it spans
This table is here because it is worth being straight about what it shows. On housing, heating and tenure, N1 tracks both Islington and Hackney closely. It is a slightly flatter, slightly more electrically heated version of either. Unlike SE1 and SW9, the district's Census profile is not what makes it different from its parents.
| Census 2021, households | N1 | Islington | Hackney | London |
|---|---|---|---|---|
| In a purpose-built block of flats or tenement | 65.0% | 57.4% | 60.4% | 40.3% |
| Part of a converted or shared house, including bedsits | 14.7% | 21.3% | 15.5% | 11.1% |
| Terraced house | 10.9% | 12.7% | 13.9% | 21.3% |
| Mains gas only | 62.6% | 66.5% | 65.9% | 70.5% |
| Electric only | 16.6% | 13.8% | 14.4% | 12.6% |
| District or communal heat network only | 5.7% | 5.2% | 4.1% | 3.4% |
| Owned | 24.4% | 26.7% | 24.6% | 45.2% |
| Private rented | 32.2% | 31.2% | 32.2% | 30.0% |
| Social rented | 40.9% | 40.2% | 40.5% | 23.1% |
Social renting in N1 is 40.9% against Islington's 40.2% and Hackney's 40.5%. Private renting is 32.2% against 31.2% and 32.2%. Those are not differences. The genuinely district-level facts about N1 are the three-borough split above, the concentration of purpose-built flats at 65.0% against Islington's 57.4%, and electric-only heating running about three points above either borough. Everything else on this page is the same housing reality the borough pages describe, which is why we are not pretending otherwise.
Which council you are dealing with is a street-level question
Two thirds of N1 households are in Islington, just under a third are in Hackney and around 700 are in Camden. Three boroughs, one postcode district, and the split does not follow anything a resident would notice on the ground.
The clearest illustration is the district heating. The Shoreditch Heat Network is operated by Hackney Council and serves the Wenlock Barn, Cranston and Fairbank estates. All three have N1 addresses, the energy centre sits at the Carole Young Community Centre on the Cranston Estate, and the network has run a 375 kWe combined heat and power engine serving 464 homes since December 2012. Hackney is also procuring a second, larger network for the Colville Estate in Hoxton, intended to connect over 1,300 homes using a 2 MW heat pump. Both are N1 addresses on a Hackney network, and neither appears on an Islington page.
It is worth naming what N1 does not have, too. The Bunhill Heat and Power network, the well-known one that captures waste heat from the Northern line, belongs to Islington but is an EC1 scheme: its energy centre is at Moreland Street and Central Street and the estates it serves, including St Luke's, Redbrick, Stafford Cripps and King Square, are EC1V. It is not an N1 network and we do not treat it as one.
When a plumbing failure is entirely inside your own property, none of this matters. When it is not, all of it does. 40.9% of N1 households rent socially and only 24.4% own outright or with a mortgage, so a large share of N1 emergencies end with a report that has to go to a landlord or a freeholder rather than an invoice that goes to the caller. Sending it to the wrong borough costs days.
We name the borough as well as the fault in every written report for this reason. It is a small thing that removes an entirely avoidable round trip in a district where the boundary is invisible from the pavement.
A district of flats, with more electric heating than either parent borough
65.0% of N1 households are in a purpose-built block of flats or tenement. Across Islington the figure is 57.4% and across Hackney 60.4%, so N1 is the flatter part of both boroughs. Terraced houses account for 10.9% and converted or shared houses 14.7%, the latter noticeably below Islington's 21.3%.
16.6% of N1 homes are heated by electricity alone, against 13.8% across Islington, 14.4% across Hackney and 12.6% across London. Another 5.7% are on a district or communal heat network. Roughly one N1 household in five therefore has no gas appliance to repair, and a hot water failure is a cylinder, immersion, electric shower or heat interface unit job rather than a boiler job.
That is why our engineers hold G3 qualifications for unvented hot water cylinders rather than gas tickets alone, and why immersion elements, cylinder thermostats, expansion vessels and TP valves travel on the van. In a block, the difference between a first-visit fix and a return visit is usually whether the part was already there.
Blocks, shared stacks and the stopcock you cannot reach
With 65.0% of the district in purpose-built blocks and only 24.4% of households owning, the most common N1 emergency has a familiar shape: water appearing in a flat that is not where the failure is, and a caller who cannot reach the valve that stops it.
Shared soil stacks in blocks carry more than they were built for, and a blockage on an upper floor presents as a flood in the lowest flat. Supply isolation is frequently in a landing cupboard, a riser or the flat above rather than inside the affected dwelling. Finding the right valve quickly is most of the job, and it is the part that goes fastest when the caller can tell us the block name and whether the door entry works before we set off.
Where the same stack keeps failing, clearing it repeatedly is the expensive option. A CCTV survey establishes whether the defect is in private drainage or in a public sewer, which decides who pays for the permanent fix rather than the temporary one. Blocked toilet and drain clearance is published at £80 to £235 on our pricing page.
What actually fails in N1 property types
N1 runs from King's Cross east through Islington and Canonbury to Hoxton and De Beauvoir, mixing Georgian and Victorian terraces, canal-side conversions and a large stock of purpose-built blocks. These are the failures each produces.
Labour is £90/hr on weekdays and £120/hr out of hours, billed in 15-minute increments, with a fixed written price agreed after diagnosis and before the repair starts. Typical job totals are published on our pricing page.
Getting a van to your door in N1
N1 sits north of the Congestion Charge zone for the most part, and the practical constraints here are communal doors and the three-borough split rather than charging.
N1 sits outside the Congestion Charge zone
On TfL's own published zone map the north-eastern boundary is labelled along City Road, with the earlier TfL map also labelling Pentonville Road. N1 lies north and east of that line, and the strip immediately south of City Road is EC1V rather than N1, so no part of N1 appears inside the zone. The charge itself is £18 a day paid on the day or in advance, 07:00 to 18:00 Monday to Friday and 12:00 to 18:00 at weekends and on bank holidays. It is not a factor on an N1 call-out, and it is inside our hourly rate in any case.
ULEZ
ULEZ covers all London boroughs at £12.50 a day for non-compliant vehicles, 24 hours a day, every day of the year except Christmas Day. Also priced in, also not itemised.
Three boroughs, one postcode
Around 66% of N1 households are in Islington, 32.5% in Hackney and 1.5% in Camden. If a fault turns out to sit in communal plant or upstream pipework owned by a council freeholder, the report needs to reach the right authority. We name the borough as well as the fault in the written report, because in this district the boundary is not visible from the street.
Communal entrances and riser cupboards
65.0% of N1 households are in a purpose-built block, so most addresses here have a communal front door between the street and the fault. When you call, tell us the block name, whether the door entry works, and whether anyone on site holds riser or plant room keys at night. If the isolation valve we need is behind a locked door with no key holder on site, we will tell you before we set off what we can and cannot achieve.
Water and drainage
Thames Water is the water and sewerage undertaker across the whole of N1, in all three boroughs. Public sewer problems are Thames Water's. Private drainage on your side of the boundary is yours, and a CCTV survey is how we establish which is which before anyone is billed.
Streets, estates and developments we cover in N1
N1 covers wards in three boroughs. These are the wards the district's postcodes actually fall in, grouped by the council that would handle a communal repair.
The largest ward presence in N1, around the Angel and Upper Street. Includes Islington Square on Almeida Street, the former Royal Mail sorting office converted to flats and completed in 2020, and the Packington Estate, rebuilt to 791 homes and completed in 2018.
Georgian and Victorian terrace stock developed largely between 1820 and 1860, much of it subdivided, plus the Marquess Estate on Marquess Road, built 1966 to 1976 and since remodelled twice.
Islington's largest conservation area, described by the council as containing some of the finest sequences of squares and terraces in London, including Lonsdale Square, Gibson Square and Thornhill Square. Buried supply pipework is the recurring leak-detection job.
The Hackney side of N1, including the Colville Estate on Bridport Place, where more than 1,000 homes are being delivered. Same postcode, different council when a communal repair is someone else's.
The Wenlock Barn and Cranston estates, both served by Hackney Council's Shoreditch Heat Network from an energy centre on the Cranston Estate. Shared stacks and landing-cupboard isolation valves.
Developed from the 1830s, with houses Hackney describes as Tudor-cum-Jacobean in the central area and Italianate semi-detached villas to the south. An Article 4 Direction protects original windows and door cases.
The Regent's Canal corridor, completed in 1820 and lined with former wharf buildings, where the canal emerges from the Islington Tunnel at Vincent Terrace.
The Bemerton Estate on Bemerton Street, 737 dwellings in fourteen blocks built between 1969 and 1973, and the Priory Green Estate on Wynford Road. Regent Quarter on York Way holds converted Victorian warehouses.
The northern edge of the district, largely terraced and converted stock with some estate housing.
N1 plumbing questions we get asked
Is N1 in Islington or Hackney?
Both, and that is the single most useful thing to know about the district. 66.0% of N1 households are in Islington, 32.5% are in Hackney and 1.5% are in Camden. Hoxton East and Shoreditch, Hoxton West and De Beauvoir are Hackney wards; Barnsbury, Canonbury, St Mary's and St James', St Peter's and Canalside, Caledonian, Laycock and Mildmay are Islington. It makes no difference to a repair inside your own flat. It makes a large difference the moment the fault turns out to be a council freeholder's, because the report has to go to the right authority. We name the borough as well as the fault for exactly that reason.
There is no boiler in my N1 flat. Who do I call about hot water?
Us. 16.6% of N1 households are heated by electricity alone, above both Islington at 13.8% and Hackney at 14.4%, and another 5.7% are on a communal heat network. Roughly one home in five here has no gas appliance at all and relies on an immersion heater, a vented or unvented cylinder, an electric shower or a heat interface unit. Our engineers hold G3 qualifications for unvented hot water cylinders and work on HIUs, and elements, thermostats, expansion vessels and TP valves are carried as van stock, so most of these faults clear on the first visit.
Water is coming through my ceiling from the flat above. What do I do first?
Turn off the electricity to any affected circuit at the consumer unit, put something under the water, and call us. 65.0% of N1 homes are in a purpose-built block, and in a block the leak almost never starts where it appears. The valve that stops it may be in the flat above, in a landing cupboard or on a communal riser, and finding the right one quickly is most of the job. We attend, isolate, contain, and then document where the failure actually was so the cost lands on whoever owns that section of pipe rather than on whoever happened to be at home.
Is N1 in the Congestion Charge zone?
No. TfL's published zone map labels the north-eastern boundary along City Road, and the earlier version of the same map labels Pentonville Road. N1 sits north and east of that line, and the strip immediately south of City Road is EC1V rather than N1, so no part of the district falls inside the zone. The charge is £18 a day paid on the day or in advance, 07:00 to 18:00 Monday to Friday and 12:00 to 18:00 at weekends and bank holidays. ULEZ does apply here, as it does in every London borough, at £12.50 a day for non-compliant vehicles, but it is already inside our labour rate and you will never see a charging zone line on an N1 invoice from us.
Is N1 different from Islington as a whole?
Less than you might expect, and it is worth being straight about that. On tenure N1 is 40.9% social rented and 32.2% private rented against Islington's 40.2% and 31.2%, which is effectively the same. Where N1 does differ is that it is flatter than its borough, at 65.0% purpose-built flats against Islington's 57.4%, has rather fewer converted houses at 14.7% against 21.3%, and has more electric-only heating at 16.6% against 13.8%. The largest genuine difference is not a statistic at all: a third of N1 is not in Islington, and the Islington borough page does not cover that third.
My N1 terrace has plumbing from about four different decades. Is that normal?
In this district, yes. N1 has a large stock of Georgian and Victorian terraces, many of them subdivided into flats over the last century and often more than once. Each conversion extended or re-routed the waste runs and added another era of supply pipework, so a single house can contain lead, iron, copper and plastic meeting at junctions nobody planned. Failures cluster at those junctions rather than in the middle of a run. We trace the actual pipe route before cutting into anything, because in this stock the pipe is rarely where the layout suggests.
Question not answered here? Ring 07456 975436 or the office landline on 0207 046 1363 and an engineer will talk it through before you commit to anything.
Need an emergency plumber in N1?
Gas Safe registered and NICEIC certified engineers, on call 24 hours a day, 7 days a week, including weekends and bank holidays.
N1 sits inside Islington
N1 spans three boroughs, so it has more than one parent. Two thirds sits in Islington and just under a third in Hackney, with a small part in Camden. The borough pages cover each authority in full; this page covers the district that crosses between them.