- Companies
- Plumbers and heating engineers
- Sleaford
- C&N Insulation Ltd
C&N Insulation Ltd
- Company number
- 08442369
- Incorporated
- 13 Mar 201313 years trading
- Registered office
- 85 Elmtree Road, Ruskington, Sleaford, Lincolnshire, NG34 9FF
- Nature of business
- Plumbing, heat and air-conditioning installation; Other specialised construction activities n.e.c.
C&N Insulation Ltd is a 13-year-old private limited company registered in Sleaford, company number 08442369, one of 18 plumbing and heating companies in Sleaford. Its next accounts are due at Companies House on 20 February 2027, and the CT600 for the period to 20 May 2026 is due at HMRC on 20 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 down £53K (-32.2%) on the year before, to £111K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £117K against £7,665 owed within a year: more than 10 times cover.
- 2 employees on average, down from 3 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 |
|---|---|---|---|---|---|
| 20 May 2025 | £111K | £106K | £117K | £7,665 | 2 |
| 20 May 2024 | £164K | £132K | £177K | £21K | 3 |
| 20 May 2023 | £127K | £81K | £151K | £34K | 3 |
| 20 May 2022 | £87K | £77K | £89K | £13K | 2 |
| 20 May 2021 | £88K | £81K | £106K | £20K | 2 |
| 20 May 2020 | £81K | £67K | £92K | £13K | 2 |
| 20 May 2019 | £95K | £84K | £105K | £12K | 2 |
| 20 May 2018 | £100K | £91K | £127K | £28K | 2 |
| 20 May 2017 | £76K | £54K | £99K | £24K | 2 |
| 20 May 2016 | £62K | £48K | £86K | £24K |
Where C&N Insulation Ltd is registered
The registered office is in Sleaford (NG34), in the North Kesteven local authority area, East Midlands. Show NG34 9FF on a map.
Other trade companies in NG34
- Bailgate Electrical LimitedElectricians
- McGann Construction LtdBuilders
- All Tyre Supplies LtdMotor traders
- Dynamic Service Centre LtdMechanics and garages
- GS Cooling & Heating LtdPlumbers and heating engineers
- Jeffrey Joseph LimitedFinishing trades
- HD Garden Maintenance LtdLandscapers and gardeners
- RJ Harriss Contracts LtdProperty developers
What happens if C&N Insulation 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 20 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 21 Feb 2027 to 20 Mar 2027 | £150 |
| 1 to 3 months late | 21 Mar 2027 to 20 May 2027 | £375 |
| 3 to 6 months late | 21 May 2027 to 20 Aug 2027 | £750 |
| More than 6 months late | From 21 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 21 May 2027 | £200 |
| 3 months late | 20 Aug 2027 | another £200 |
| 6 months late | 20 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 20 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
- 08442369
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 March 2013 (13 years ago)
- Registered office
- 85 Elmtree Road, Ruskington, Sleaford, Lincolnshire, NG34 9FF
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 20 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 20 May 2025
- Last confirmation statement
- 13 March 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Sleaford
Other active plumbing and heating companies registered in Sleaford.
- Centurion Plumbing Services Limited2015
- Emberstone Energy Limited2026
- Emberstone Interiors Limited2021
- GS Cooling & Heating Ltd2026
- Imr Mechanical Ltd2012
- Kev Greatrix Plumbing & Heating Ltd2019
- Kyme Heating Ltd2021
- Luna Installs Ltd2019
All plumbing and heating companies in Sleaford · All trades in Sleaford · Plumbers and heating engineers across the UK
Frequently asked questions
When are C&N Insulation Ltd's accounts due?
C&N Insulation Ltd's next accounts are due at Companies House by 20 February 2027 (in 130 days), covering the period to 20 May 2026.
When is C&N Insulation Ltd's CT600 due?
The CT600 for the period to 20 May 2026 is due at HMRC by 20 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 21 February 2027.
Is C&N Insulation Ltd still trading?
C&N Insulation 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&N Insulation Ltd do?
C&N Insulation Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Other specialised construction activities n.e.c. (SIC 43999).
How old is C&N Insulation Ltd?
C&N Insulation Ltd was incorporated on 13 March 2013, 13 years ago.
What is the penalty if C&N 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 C&N Insulation 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.