- Companies
- Facilities management
- Merthyr Tydfil
- Dor-Master Ltd
Dor-Master Ltd
- Company number
- 08406711
- Incorporated
- 18 Feb 201313 years trading
- Registered office
- 72 Gwernllwyn Close Dowlais, Dowlais, Merthyr Tydfil, CF48 3DL
- Nature of business
- Combined facilities support activities
Dor-Master Ltd is a 13-year-old private limited company registered in Merthyr Tydfil, company number 08406711, one of the UK's facilities management companies. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £1,900 (+342.3%) on the year before, to £2,455.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £27K against £8,660 owed within a year: 3.1 times cover.
- 1 employee on average during the year.
- 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 |
|---|---|---|---|---|---|
| 31 Mar 2025 | £2,455 | £27K | £8,660 | 1 | |
| 31 Mar 2024 | £555 | £24K | £5,504 | 1 | |
| 31 Mar 2023 | £374 | £28K | £8,356 | 1 | |
| 31 Mar 2022 | £349 | £24K | £4,622 | 1 | |
| 31 Mar 2021 | £11K | £29K | £15K | 1 | |
| 31 Mar 2020 | £1,882 | £24K | £41K | 1 | |
| 31 Mar 2019 | £1,566 | £11K | £19K | ||
| 31 Mar 2018 | £1,099 | £9,265 | £20K | ||
| 31 Mar 2017 | £4,451 | £1,673 | £12K | ||
| 31 Mar 2016 | £4,070 | £1,254 | £17K |
Where Dor-Master Ltd is registered
The registered office is in Merthyr Tydfil (CF48), in the Merthyr Tydfil local authority area, Wales. Show CF48 3DL on a map.
Other trade companies in CF48
- Valley Roofing Building & Carpentry LimitedRoofers
- Ajl Rail/Civil Engineering LtdCivil engineering
- M&K Valeting LtdCleaning companies
- Mdgroundworks LtdGroundworks and demolition
- Craig Lloyd Groundworks LtdCivil engineering
- Noarc Electrical LtdElectricians
- Elt Brickwork LimitedBuilders
- JBH Decorating LimitedPainters and decorators
What happens if Dor-Master 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 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 08406711
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 February 2013 (13 years ago)
- Registered office
- 72 Gwernllwyn Close Dowlais, Dowlais, Merthyr Tydfil, CF48 3DL
- Nature of business
- Combined facilities support activities (SIC 81100)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 30 April 2026
Filing notes for facilities management companies
Facilities management companies usually invoice on contract, so accrued income and deferred income matter at the year end.
Similar companies in Merthyr Tydfil
Other active facilities management companies registered in Merthyr Tydfil.
- Fernwood Estate Management Limited2013
- Mishu Limited2013
- Anpr Parking Services Ltd2013
- Thor Property Management Limited2013
- 28 Devonshire Place Limited2013
- Autrac Facilities Ltd2013
- Ab Multi-Trade Ltd2013
- Priority Service Ltd2013
All facilities management companies in Merthyr Tydfil · All trades in Merthyr Tydfil · Facilities management across the UK
Frequently asked questions
When are Dor-Master Ltd's accounts due?
Dor-Master Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Dor-Master Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Dor-Master Ltd still trading?
Dor-Master 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 Dor-Master Ltd do?
Dor-Master Ltd is registered under Combined facilities support activities (SIC 81100).
How old is Dor-Master Ltd?
Dor-Master Ltd was incorporated on 18 February 2013, 13 years ago.
What is the penalty if Dor-Master 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 Dor-Master 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.