- Companies
- Electricians
- Durham
- John Cullerton & Sons Limited
John Cullerton & Sons Limited
- Company number
- 04489787
- Incorporated
- 18 Jul 200224 years trading
- Registered office
- Unit A Rennys Lane, Gilesgate Moor, Durham, Co Durham, DH1 2RB
- Nature of business
- Electrical installation
John Cullerton & Sons Limited is a 24-year-old private limited company registered in Durham, company number 04489787, one of 46 electrical contractors in Durham. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £373K (+83.8%) on the year before, to £818K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £1.8M against £1.4M owed within a year: 1.3 times cover.
- 26 employees on average, down from 27 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £818K | £1M | £1.8M | £1.4M | 26 |
| 31 Jul 2024 | £445K | £537K | £1.6M | £1.5M | 27 |
| 31 Jul 2023 | £297K | £244K | £1.6M | £1.6M | 27 |
| 31 Jul 2022 | £213K | £70K | £1.3M | £1.3M | 31 |
| 31 Jul 2021 | £138K | £140K | £1M | £927K | 29 |
| 31 Jul 2020 | £73K | £131K | £967K | £884K | 33 |
| 31 Jul 2019 | £264K | £81K | £1.5M | £1.3M | 33 |
| 31 Jul 2018 | £261K | £330 | £1.1M | £915K | 29 |
| 31 Jul 2017 | £250K | £18K | £975K | £942K | 32 |
| 31 Jul 2016 | £170K | £1,202 | £848K | £776K |
Public contracts won
John Cullerton & Sons Limited has 5 public sector contract awards on record; the ones with their own published value total £150K, from 2019 to 2025. Source: Contracts Finder and Find a Tender award notices. For 4 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. 3 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Durham County Council2 awards
- The North Yorkshire Council1 award
- North Yorkshire County Council1 award
- North Tyneside Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Durham County Council | Portable Appliance Testing (PAT) | £150K | 15 Dec 2025 |
| The North Yorkshire Council | Electrical Safety Framework - 469-NYC-RS | Ceiling, not shown | 8 Dec 2025 |
| Durham County Council | Framework Agreement for Electrical Contractors | Ceiling, not shown | 8 Dec 2022 |
| North Yorkshire County Council | Fixed Electrical Inspection and Testing and Portable Appliance Testing Framework | Ceiling, not shown | 4 Jan 2022 |
| North Tyneside Council | Contract 41 - Responsive Repairs and Planned Preventative Maintenance Contract for Operational, Schools and Commercial Buildings - Electrical 2019 -2021 | Ceiling, not shown | 13 Mar 2019 |
Where John Cullerton & Sons Limited is registered
The registered office is in Durham (DH1), in the County Durham local authority area, North East. Show DH1 2RB on a map.
Other trade companies in DH1
- Drives & Patios 4 You LtdLandscapers and gardeners
- Hanser LimitedBuilders
- McCluskey Roofing North East LtdRoofers
- Phone and Laptop Repairs Ne LtdRepair services
- Tyne & Wear Commercial Cleaning LtdCleaning companies
- HZG Projects LimitedCivil engineering
- Damiora Group LtdFacilities management
- James Lawton Homes ( Whickham Farm ) LtdProperty developers
Also registered at this address
1 other company uses the same registered office as John Cullerton & Sons Limited.
- Glenanne LimitedProperty developers
What happens if John Cullerton & Sons Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 04489787
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 July 2002 (24 years ago)
- Registered office
- Unit A Rennys Lane, Gilesgate Moor, Durham, Co Durham, DH1 2RB
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 6 February 2026
- Charges (mortgages)
- 5 outstanding of 6 registered
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Durham
Other active electrical contractors registered in Durham.
- KTS Electrical Services Limited2026
- Laz Electrical Services Ltd2025
- Legacy Engineering Gas and Heating Solutions Ltd2026
- LLH M&E Services Limited2025
- M M Wind Services Ltd2025
- Marcin Nager Electrical Engineering Limited2021
- MJ Jointing Ltd2025
- MMJ Technical Services Ltd2025
All electrical contractors in Durham · All trades in Durham · Electricians across the UK
Frequently asked questions
When are John Cullerton & Sons Limited's accounts due?
John Cullerton & Sons Limited's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is John Cullerton & Sons Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is John Cullerton & Sons Limited still trading?
John Cullerton & Sons Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does John Cullerton & Sons Limited do?
John Cullerton & Sons Limited is registered under Electrical installation (SIC 43210).
How old is John Cullerton & Sons Limited?
John Cullerton & Sons Limited was incorporated on 18 July 2002, 24 years ago.
Has John Cullerton & Sons Limited won public sector contracts?
Yes. John Cullerton & Sons Limited has 5 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £150K), most recently from Durham County Council.
What is the penalty if John Cullerton & Sons Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View John Cullerton & Sons Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.