Mastone Ltd
- Company number
- 09650380
- Incorporated
- 22 Jun 201511 years trading
- Registered office
- 18 Tremaine Grove, Tremaine Grove, Hemel Hempstead, HP2 6NS
- Nature of business
- Other specialised construction activities n.e.c.
Mastone Ltd is a 11-year-old private limited company registered in Hemel Hempstead, company number 09650380, one of 104 specialist construction companies in Hemel Hempstead. 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 £4,370 (-212.7%) on the year before, to -£2,315.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- 1 employee on average, up from 0 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 | -£2,315 | £11K | 1 | ||
| 30 Jun 2024 | £2,055 | £24K | £11K | 0 | |
| 30 Jun 2023 | £1,855 | £24K | £10K | 0 | |
| 30 Jun 2022 | £1,675 | £24K | £10K | 0 | |
| 30 Jun 2021 | £1,135 | £26K | £12K | 1 | |
| 30 Jun 2020 | £785 | £805 | £1,590 | 1 | |
| 30 Jun 2019 | £559 | £967 | £2,553 | ||
| 30 Jun 2018 | £3,744 | £18K | £18K | ||
| 30 Jun 2017 | £5,503 | £26K | £26K | ||
| 30 Jun 2016 | £426 | £17K | £18K | £18K |
Where Mastone Ltd is registered
The registered office is in Hemel Hempstead (HP2), in the Dacorum local authority area, East of England. Show HP2 6NS on a map.
Other trade companies in HP2
- Prime Carpet Cleaning Experts LtdCleaning companies
- House to Home Builders LtdBuilders
- Gabriel Curic LtdCivil engineering
- Morya Holdings LtdProperty developers
- Construction by Nick LtdSpecialist contractors
- Ayzat Cleaning Solutions LimitedCleaning companies
- Thompsons Prowash LtdCleaning companies
- Herts Paving & Landscapes LtdSpecialist contractors
What happens if Mastone 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 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
- 09650380
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 June 2015 (11 years ago)
- Registered office
- 18 Tremaine Grove, Tremaine Grove, Hemel Hempstead, HP2 6NS
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 22 June 2026
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 Hemel Hempstead
Other active specialist construction companies registered in Hemel Hempstead.
- Milos Marbles Limited2014
- MKR Enterprises Ltd2026
- Novated Procurements Ltd2025
- Pacebrow.Com Ltd2005
- Pool Enclosures Limited2018
- Premery Ltd2022
- Primrose Development and Construction Ltd2005
- Q.P. Rigging Ltd2022
All specialist construction companies in Hemel Hempstead · All trades in Hemel Hempstead · Specialist contractors across the UK
Frequently asked questions
When are Mastone Ltd's accounts due?
Mastone Ltd's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Mastone Ltd'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 Mastone Ltd still trading?
Mastone 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 Mastone Ltd do?
Mastone Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Mastone Ltd?
Mastone Ltd was incorporated on 22 June 2015, 11 years ago.
What is the penalty if Mastone 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 Mastone 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.