- Company number
- 11361430
- Incorporated
- 15 May 20188 years trading
- Registered office
- 20-22 Wenlock Road, London, N1 7GU
- Nature of business
- Construction of commercial buildings
JCM Insulation Services Ltd is a 8-year-old private limited company registered in London, company number 11361430, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £11K (+304.8%) on the year before, to £15K.
- Net assets rose in 5 of 6 year-on-year comparisons on record.
- Current assets of £127K against £113K owed within a year: 1.1 times cover.
- 4 employees on average, up from 3 the year before.
- 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 May 2025 | £15K | £19K | £127K | £113K | 4 |
| 31 May 2024 | £3,672 | £888 | £65K | £63K | 3 |
| 31 May 2023 | -£2,672 | £18 | £38K | £43K | 3 |
| 31 May 2022 | -£4,719 | £37K | £15K | 3 | |
| 31 May 2021 | £5,102 | £8,041 | £5,176 | 0 | |
| 31 May 2020 | £383 | £5,753 | £3,450 | 1 | |
| 31 May 2019 | £262 | £3,125 | £1,903 |
Where JCM Insulation 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 JCM Insulation 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 11361430
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 May 2018 (8 years ago)
- Registered office
- 20-22 Wenlock Road, London, N1 7GU
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 31 March 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in London
Other active building contractors registered in London.
- JCN Decorators Ltd2026
- JCP Brickwork Ltd2022
- Jculshaw Builders Ltd2026
- JD Builder Ltd2011
- JD Construction & Roofing Ltd2024
- JD Lofts Ltd2019
- JDC Ceilings Ltd2020
- JDG Developments (London) Limited2011
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are JCM Insulation Services Ltd's accounts due?
JCM Insulation Services Ltd's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is JCM Insulation Services Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is JCM Insulation Services Ltd still trading?
JCM Insulation 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 JCM Insulation Services Ltd do?
JCM Insulation Services Ltd is registered under Construction of commercial buildings (SIC 41201).
How old is JCM Insulation Services Ltd?
JCM Insulation Services Ltd was incorporated on 15 May 2018, 8 years ago.
What is the penalty if JCM Insulation 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 JCM Insulation 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.