- Companies
- Installers
- London
- C &J Geotechnical Services Ltd
C &J Geotechnical Services Ltd
- Company number
- 11504041
- Incorporated
- 7 Aug 20188 years trading
- Registered office
- 20-22 Wenlock Road, London, N1 7GU
- Nature of business
- Other construction installation
C &J Geotechnical Services Ltd is a 8-year-old private limited company registered in London, company number 11504041, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 down £12K (-3.9%) on the year before, to £304K.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £219K against £89K owed within a year: 2.5 times cover.
- 6 employees on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £304K | £219K | £89K | 6 | |
| 31 Aug 2024 | £317K | £564K | £295K | 6 | |
| 31 Aug 2023 | £155K | £245K | £132K | 5 | |
| 31 Aug 2022 | £93K | £479K | £421K | 3 | |
| 31 Aug 2021 | £3,576 | £171K | £185K | 3 | |
| 31 Aug 2020 | -£6,427 | £102K | £109K | 3 | |
| 31 Aug 2019 | £426 | £6,443 | £140K | £140K |
Public contracts won
C &J Geotechnical Services Ltd has one public sector contract award on record; the ones with their own published value total £54K (2024). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Barnsley Metropolitan Borough Council | Provision of Maintenance and Repairs to 70 Lunn Road | £54K | 11 Sep 2024 |
Where C &J Geotechnical Services Ltd is registered
The registered office is in London (N1), in the Hackney local authority area, London. Show N1 7GU on a map.
Other trade companies in N1
- Tagwise LtdSpecialist contractors
- Sphere Aviation Solutions UK LtdMachinery repair and installation
- Get IT Done Builders LtdJoiners and carpenters
- Evolution Products LimitedMotor traders
- Fleetstone Trading LtdMotor traders
- Kenneth Brady LtdElectricians
- UK Import Export LtdBuilders
- Magic Door Services LimitedMachinery repair and installation
Shared registered office
804 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if C &J Geotechnical Services Ltd 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 31 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 11504041
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 August 2018 (8 years ago)
- Registered office
- 20-22 Wenlock Road, London, N1 7GU
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 6 August 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- C&F Building Ltd2025
- C. Tavener & Son Limited1986
- C.M. Home Solutions Ltd2024
- C2O Energ Ltd2020
- Cabletron Ltd2022
- Call PP Ltd2026
- Callummilburn Ltd2024
- Cambourne Estates Ltd2018
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are C &J Geotechnical Services Ltd's accounts due?
C &J Geotechnical Services Ltd's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is C &J Geotechnical Services Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is C &J Geotechnical Services Ltd still trading?
C &J Geotechnical Services Ltd 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 C &J Geotechnical Services Ltd do?
C &J Geotechnical Services Ltd is registered under Other construction installation (SIC 43290).
How old is C &J Geotechnical Services Ltd?
C &J Geotechnical Services Ltd was incorporated on 7 August 2018, 8 years ago.
Has C &J Geotechnical Services Ltd won public sector contracts?
Yes. C &J Geotechnical Services Ltd has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £54K), most recently from Barnsley Metropolitan Borough Council.
What is the penalty if C &J Geotechnical Services Ltd 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 C &J Geotechnical Services Ltd 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.