- Companies
- Installers
- Thetford
- Mason Insulation Ltd
Mason Insulation Ltd
- Company number
- 14078860
- Incorporated
- 29 Apr 20224 years trading
- Registered office
- Himley House 47 Hythe Road, Methwold, Thetford, Norfolk, IP26 4PS
- Nature of business
- Other construction installation; Other building completion and finishing; Management consultancy activities other than financial management; Environmental consulting activities
Mason Insulation Ltd is a 4-year-old private limited company registered in Thetford, company number 14078860, one of 14 installation companies (insulation, lifts, shutters and similar) in Thetford. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £19K (+87.4%) on the year before, to £41K.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £33K against £6,804 owed within a year: 4.8 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 4 years, 2023 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £41K | £33K | £6,804 | 3 | |
| 31 Mar 2025 | £22K | £24K | £2,725 | 3 | |
| 31 Mar 2024 | £3,997 | £5,049 | £1,645 | 3 | |
| 30 Apr 2023 | £100 |
Who runs and owns Mason Insulation Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| T*** M*** | Director | Apr 2022 |
| K*** M*** | Secretary | Apr 2022 |
People with significant control (2)
Where Mason Insulation Ltd is registered
The registered office is in Thetford (IP26), in the King's Lynn and West Norfolk local authority area, East of England. Show IP26 4PS on a map.
Other trade companies in IP26
- Awr Hire LimitedSpecialist contractors
- Benji's Signature Homes LtdProperty developers
- Kerridge Building Services LimitedSpecialist contractors
- Truelight Electrical LtdElectricians
- DR Demuth UK LtdMotor traders
- Casco Maintenance LtdFinishing trades
- Solo Contract Services LtdSpecialist contractors
- GNB Hingham LimitedProperty developers
What happens if Mason 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 31 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 14078860
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 April 2022 (4 years ago)
- Registered office
- Himley House 47 Hythe Road, Methwold, Thetford, Norfolk, IP26 4PS
- Nature of business
- Other construction installation (SIC 43290)
Other building completion and finishing (SIC 43390)
Management consultancy activities other than financial management (SIC 70229)
Environmental consulting activities (SIC 74901) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 28 April 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 Thetford
Other active installation companies (insulation, lifts, shutters and similar) registered in Thetford.
- Newbuild Frames Limited1971
- Newrooms (Methwold) Limited2011
- Norfolk Surfacing Ltd2022
- Thetford Windows Ltd2025
- WB Property Maintenance Ltd2015
- Cally Sanders Tiling Ltd2022
- Ccdtec Limited2025
- Clear Pathway Consultants Ltd2018
All installation companies (insulation, lifts, shutters and similar) in Thetford · All trades in Thetford · Installers across the UK
Frequently asked questions
When are Mason Insulation Ltd's accounts due?
Mason Insulation Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Mason Insulation Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Mason Insulation Ltd still trading?
Mason 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 Mason Insulation Ltd do?
Mason Insulation Ltd is registered under Other construction installation (SIC 43290); Other building completion and finishing (SIC 43390); Management consultancy activities other than financial management (SIC 70229); Environmental consulting activities (SIC 74901).
How old is Mason Insulation Ltd?
Mason Insulation Ltd was incorporated on 29 April 2022, 4 years ago.
Who runs Mason Insulation Ltd?
Mason Insulation Ltd has 1 active director, the longest-serving appointed in Apr 2022. Their names and service addresses are on the Companies House register.
Who owns Mason Insulation Ltd?
2 people or companies have significant control of Mason Insulation Ltd: an individual (owns 25% to 50% of the shares); an individual (owns 50% to 75% of the shares).
What is the penalty if Mason 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 Mason 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.