- Company number
- 10700370
- Incorporated
- 30 Mar 20179 years trading
- Registered office
- 7 Cardiff Road, Llandaff, Cardiff, Cardiff, CF5 2DN
- Nature of business
- Construction of commercial buildings
Dockham Mechanical Limited is a 9-year-old private limited company registered in Cardiff, company number 10700370, one of 361 building contractors in Cardiff. Its next accounts are due at Companies House on 31 December 2027, and its first CT600 is due at HMRC on 30 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 £937 (+73.5%) on the year before, to £2,212.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £9,208 against £6,996 owed within a year: 1.3 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 9 years, 2018 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Mar 2026 | £2,212 | £465 | £9,208 | £6,996 | 0 |
| 30 Mar 2025 | £1,275 | £8 | £5,066 | £3,791 | 0 |
| 30 Mar 2024 | £5,422 | £2,032 | £9,897 | £4,475 | 0 |
| 31 Mar 2023 | £3,251 | £855 | £7,749 | £4,498 | 0 |
| 31 Mar 2022 | £3,925 | £1,172 | £9,316 | £5,391 | 0 |
| 31 Mar 2021 | £5,717 | £2,913 | £11K | £4,783 | 0 |
| 31 Mar 2020 | £6,365 | £604 | £8,641 | £2,276 | 0 |
| 31 Mar 2019 | £793 | £767 | £7,826 | £7,033 | |
| 31 Mar 2018 | £183 | £7,306 | £14K | £14K |
Where Dockham Mechanical Limited is registered
The registered office is in Cardiff (CF5), in the Cardiff local authority area, Wales. Show CF5 2DN on a map.
Other trade companies in CF5
- Art Electrical Solutions LimitedElectricians
- Chapman Construction Cardiff LtdBuilders
- MN Projects Co. LtdBuilders
- Bridge Deck Solutions LtdCivil engineering
- Gilps Construction LtdPainters and decorators
- CF Window Cleaning LtdCleaning companies
- RK Fire and Electrical LtdElectricians
- BDL Cleaning LtdCleaning companies
What happens if Dockham Mechanical 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 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
- 10700370
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 March 2017 (9 years ago)
- Registered office
- 7 Cardiff Road, Llandaff, Cardiff, Cardiff, CF5 2DN
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 March 2026
- Last confirmation statement
- 27 April 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Cardiff
Other active building contractors registered in Cardiff.
- Domesticon Ltd2025
- Domi London Builders Ltd2025
- DP Developments & Construction Ltd2020
- Dragonheart Homes Limited2022
- Draycott Construction Limited2014
- Dreamspace Design & Construction Ltd2024
- Durlston Properties Limited2012
- Eco Homes Direct Limited2009
All building contractors in Cardiff · All trades in Cardiff · Builders across the UK
Frequently asked questions
When are Dockham Mechanical Limited's accounts due?
Dockham Mechanical Limited's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Dockham Mechanical Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 30 March 2027, due by 30 March 2028, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Dockham Mechanical Limited still trading?
Dockham Mechanical 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 Dockham Mechanical Limited do?
Dockham Mechanical Limited is registered under Construction of commercial buildings (SIC 41201).
How old is Dockham Mechanical Limited?
Dockham Mechanical Limited was incorporated on 30 March 2017, 9 years ago.
What is the penalty if Dockham Mechanical 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 Dockham Mechanical 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.