- Companies
- Specialist contractors
- Leicester
- 1ST Insulation Ltd
1ST Insulation Ltd
- Company number
- 14261667
- Incorporated
- 28 Jul 20224 years trading
- Registered office
- 2 Ferrers Street, Leicester, LE2 6QF
- Nature of business
- Other specialised construction activities n.e.c.
1ST Insulation Ltd is a 4-year-old private limited company registered in Leicester, company number 14261667, one of 263 specialist construction companies in Leicester. 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.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for 1ST Insulation LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £3,767 (-27.4%) on the year before, to -£18K.
- Current assets of £764 against £38K owed within a year: 0.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | -£18K | £764 | £38K | 0 | |
| 31 Jul 2024 | -£14K | £9,102 | £43K | 0 | |
| 31 Jul 2023 | £7,282 | £1,173 | £29K | 0 |
Where 1ST Insulation Ltd is registered
The registered office is in Leicester (LE2), in the Leicester local authority area, East Midlands. Show LE2 6QF on a map.
Other trade companies in LE2
- Manship Enterprises LimitedElectricians
- Dumine Autos LimitedMotor traders
- PSDR LtdProperty developers
- Belcher Roofing LtdRoofers
- Green Garden Services & Solutions LtdFinishing trades
- Sopon Cars LtdMechanics and garages
- Group KMZ LimitedMotor traders
- Sultannoorcleaningservices LtdCleaning companies
What happens if 1ST 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 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
- 14261667
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 July 2022 (4 years ago)
- Registered office
- 2 Ferrers Street, Leicester, LE2 6QF
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 18 November 2025
- Previous names
- 1ST Insulation Ltd Ltd (until 6 Dec 2022)
A.I.O Construction Solutions Ltd (until 21 Nov 2022)
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Leicester
Other active specialist construction companies registered in Leicester.
- 2B Electrical & Mechanical Services Ltd2010
- 313 Construction Ltd2025
- 365 Directional Drilling Ltd2025
- 365 Vacuum Excavation Ltd2021
- 7121 Lifting Ltd2025
- A B Property Maintenance and Contracts Limited2013
- A J A Consulting (Leicester) Limited2015
- A J Scattergood Plant Hire Limited2007
All specialist construction companies in Leicester · All trades in Leicester · Specialist contractors across the UK
Frequently asked questions
When are 1ST Insulation Ltd's accounts due?
1ST Insulation Ltd's next accounts are due at Companies House by 30 April 2027 (in 200 days), covering the period to 31 July 2026.
When is 1ST Insulation Ltd'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 1ST Insulation Ltd still trading?
1ST 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 1ST Insulation Ltd do?
1ST Insulation Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is 1ST Insulation Ltd?
1ST Insulation Ltd was incorporated on 28 July 2022, 4 years ago.
What is the penalty if 1ST 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 1ST 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.