- Companies
- Property developers
- Mag Construction SW Ltd
Mag Construction SW Ltd
- Company number
- 12155894
- Incorporated
- 14 Aug 20197 years trading
- Registered office
- Casa Amore, Pengersick Croft, Praa Sands, Cornwall, TR20 9SW
- Nature of business
- Development of building projects
Mag Construction SW Ltd is a 7-year-old private limited company registered in Praa Sands, company number 12155894, one of the UK's property development companies. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 up £317 (+406.4%) on the year before, to £395.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £9,907 against £9,574 owed within a year: 1.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £395 | £2,137 | £9,907 | £9,574 | 1 |
| 30 Sep 2024 | £78 | £1,471 | £5,371 | £8,005 | 1 |
| 30 Sep 2023 | -£6,497 | £3,032 | £5,583 | £19K | 1 |
| 31 Aug 2022 | -£18K | £4,493 | £6,679 | £35K | 1 |
| 31 Aug 2021 | £223 | £68K | £77K | £48K | 1 |
| 31 Aug 2020 | £23K | £46K | £65K | £46K | 1 |
Where Mag Construction SW Ltd is registered
The registered office is in Praa Sands (TR20), in the Cornwall local authority area, South West. Show TR20 9SW on a map.
Other trade companies in TR20
- Perran Domains LtdFinishing trades
- DRBS Properties LimitedProperty developers
- Cornwall Doors LtdJoiners and carpenters
- Carrek Halen Construction LtdBuilders
- Kernow Professional Cleaning LtdCleaning companies
- KDF Garage Services LtdMechanics and garages
- Granite and Green LtdLandscapers and gardeners
- Bosvenning Homes LtdProperty developers
What happens if Mag Construction SW 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 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 12155894
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 August 2019 (7 years ago)
- Registered office
- Casa Amore, Pengersick Croft, Praa Sands, Cornwall, TR20 9SW
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 13 August 2025
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies
Other active property development companies.
Frequently asked questions
When are Mag Construction SW Ltd's accounts due?
Mag Construction SW Ltd's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Mag Construction SW Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Mag Construction SW Ltd still trading?
Mag Construction SW 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 Mag Construction SW Ltd do?
Mag Construction SW Ltd is registered under Development of building projects (SIC 41100).
How old is Mag Construction SW Ltd?
Mag Construction SW Ltd was incorporated on 14 August 2019, 7 years ago.
What is the penalty if Mag Construction SW 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 Mag Construction SW 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.