- Companies
- Installers
- Rainworth, Mansfield
- Chas. Mason Construction Co. Limited
Chas. Mason Construction Co. Limited
- Company number
- 00764536
- Incorporated
- 18 Jun 196363 years trading
- Registered office
- Suite 5, the Willows, Ransom Wood Business Park, Southwell Road West, Rainworth, Mansfield, Nottinghamshire, NG21 0HJ
- Nature of business
- Other construction installation
Chas. Mason Construction Co. Limited is a 63-year-old private limited company registered in Rainworth, Mansfield, company number 00764536, one of the UK's installation companies (insulation, lifts, shutters and similar). Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 £4,216 (-67.4%) on the year before, to -£10K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £11K against £26K owed within a year: 0.4 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 |
|---|---|---|---|---|---|
| 30 Jun 2025 | -£10K | £6,784 | £11K | £26K | 2 |
| 30 Jun 2024 | -£6,257 | £9 | £7,387 | £18K | 3 |
| 30 Jun 2023 | £5,999 | £1,371 | £13K | £13K | 3 |
| 30 Jun 2022 | £7,693 | £498 | £17K | £18K | 2 |
| 30 Jun 2021 | £747 | £1,355 | £15K | £14K | 2 |
| 30 Jun 2020 | £3,125 | £532 | £15K | £13K | 2 |
| 30 Jun 2019 | -£3,017 | £3,239 | £11K | £15K | |
| 30 Jun 2018 | £157 | £1,280 | £9,643 | £10K | 1 |
| 30 Jun 2017 | -£3,052 | £151 | £7,700 | £12K | 1 |
| 30 Jun 2016 | -£911 | £109 | £11K | £13K |
Who runs and owns Chas. Mason Construction Co. Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| N*** S*** | Director | Mar 2005 |
| J*** S*** | Secretary | Mar 2023 |
3 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| F*** S*** | Secretary | Mar 2023 | |
| D*** S*** | Director | Jun 2024 | |
| F*** S*** | Director | Mar 1999 |
Person with significant control
Where Chas. Mason Construction Co. Limited is registered
The registered office is in Rainworth, Mansfield (NG21), in the Mansfield local authority area, East Midlands. Show NG21 0HJ on a map.
Other trade companies in NG21
- MSWF Retail LtdMotor traders
- D Nelson Electrical LimitedElectricians
- Hardback Tree Services LtdLandscapers and gardeners
- Evergreen Fencing & Landscapes LimitedLandscapers and gardeners
- Robin Hood Refrigeration LtdPlumbers and heating engineers
- Apex Armour Coatings LtdFinishing trades
- Pba Contracts LimitedInstallers
- Rainworth Roofing LimitedRoofers
Shared registered office
46 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 Chas. Mason Construction Co. Limited 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 00764536
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 June 1963 (63 years ago)
- Registered office
- Suite 5, the Willows, Ransom Wood Business Park, Southwell Road West, Rainworth, Mansfield, Nottinghamshire, NG21 0HJ
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 31 March 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.
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Other active installation companies (insulation, lifts, shutters and similar) registered in Rainworth, Mansfield.
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Frequently asked questions
When are Chas. Mason Construction Co. Limited's accounts due?
Chas. Mason Construction Co. Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Chas. Mason Construction Co. Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Chas. Mason Construction Co. Limited still trading?
Chas. Mason Construction Co. Limited 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 Chas. Mason Construction Co. Limited do?
Chas. Mason Construction Co. Limited is registered under Other construction installation (SIC 43290).
How old is Chas. Mason Construction Co. Limited?
Chas. Mason Construction Co. Limited was incorporated on 18 June 1963, 63 years ago.
Who runs Chas. Mason Construction Co. Limited?
Chas. Mason Construction Co. Limited has 1 active director, the longest-serving appointed in Mar 2005. Their names and service addresses are on the Companies House register.
Who owns Chas. Mason Construction Co. Limited?
One person or company has significant control of Chas. Mason Construction Co. Limited: an individual (owns 75% or more of the shares).
What is the penalty if Chas. Mason Construction Co. Limited 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 Chas. Mason Construction Co. Limited 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.