- Companies
- Installers
- London
- RKC Insulation Ltd
RKC Insulation Ltd
- Company number
- 16090405
- Incorporated
- 20 Nov 20241 year trading
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Other construction installation
RKC Insulation Ltd is a 1-year-old private limited company registered in London, company number 16090405, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Companies House shows its accounts as overdue: they were due on 20 August 2026.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where RKC Insulation 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
1,583 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 RKC Insulation Ltd files late
If the accounts reach Companies House today, the late filing penalty is £375 (£750 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 21 Aug 2026 to 20 Sep 2026 | £150 |
| 1 to 3 months late | 21 Sep 2026 to 20 Nov 2026 | £375 |
| 3 to 6 months late | 21 Nov 2026 to 20 Feb 2027 | £750 |
| More than 6 months late | From 21 Feb 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2026 | £200 |
| 3 months late | 28 Feb 2027 | another £200 |
| 6 months late | 30 May 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 2027 | 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
- 16090405
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 November 2024 (1 year ago)
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 19 November 2025
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.
- RKK Infinity Projects Ltd2016
- RKRN Construction Ltd2026
- RMK Sales Ltd2026
- RMNC Lift Installation Ltd2019
- RMP Construction Ltd2024
- Road Marking Solutions Ltd2023
- Robinson Property Maintenance Limited2023
- Robma Limited2018
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are RKC Insulation Ltd's accounts due?
RKC Insulation Ltd's accounts were due at Companies House on 20 August 2026 and the register shows them as overdue.
When is RKC Insulation Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 19 November 2025, due by 19 November 2026, and one for the period to 30 November 2025, due by 30 November 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is RKC Insulation Ltd still trading?
RKC Insulation Ltd is listed as active on the Companies House register (checked 13 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 RKC Insulation Ltd do?
RKC Insulation Ltd is registered under Other construction installation (SIC 43290).
How old is RKC Insulation Ltd?
RKC Insulation Ltd was incorporated on 20 November 2024, 1 year ago.
What is the penalty if RKC Insulation 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 RKC Insulation Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.