- Companies
- Plumbers and heating engineers
- Tamworth
- Diamond Project Management Limited
Diamond Project Management Limited
- Company number
- 06373311
- Incorporated
- 17 Sep 200719 years trading
- Registered office
- 92 Main Street, Clifton Campville, Tamworth, Staffordshire, B79 0AP
- Nature of business
- Plumbing, heat and air-conditioning installation; Other specialised construction activities n.e.c.
Diamond Project Management Limited is a 19-year-old private limited company registered in Tamworth, company number 06373311, one of 58 plumbing and heating companies in Tamworth. 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 down £2,027 (-16.1%) on the year before, to £11K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £6,577 against £3,453 owed within a year: 1.9 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 | £11K | £4,835 | £6,577 | £3,453 | 1 |
| 31 Mar 2024 | £13K | £10K | £14K | £1,737 | 1 |
| 31 Mar 2023 | £10K | £13K | £14K | £4,113 | 1 |
| 31 Mar 2022 | £10K | £12K | £13K | £2,824 | 1 |
| 31 Mar 2021 | £7,524 | £7,889 | £8,797 | £1,273 | 1 |
| 31 Mar 2020 | £5,271 | £8,875 | £8,875 | £3,604 | 1 |
| 31 Mar 2019 | £3,640 | £4,208 | £5,264 | £1,623 | 1 |
| 31 Mar 2018 | £1,249 | £4,535 | £4,860 | £3,706 | 1 |
| 31 Mar 2017 | £231 | £4,511 | £5,522 | £5,482 | 1 |
| 31 Mar 2016 | £622 | £3,147 | £5,927 | £5,592 |
Where Diamond Project Management Limited is registered
The registered office is in Tamworth (B79), in the Lichfield local authority area, West Midlands. Show B79 0AP on a map.
Other trade companies in B79
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- Bicars LtdMotor traders
- Tensho LtdMotor traders
- Hytower LimitedBuilders
- NRG (Midlands) LimitedElectricians
- Bobberhut LtdMechanics and garages
- Praetor Developments LtdProperty developers
- FPL Fibrepoint Linings LtdFinishing trades
What happens if Diamond Project Management 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 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
- 06373311
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 September 2007 (19 years ago)
- Registered office
- 92 Main Street, Clifton Campville, Tamworth, Staffordshire, B79 0AP
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 17 September 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Tamworth
Other active plumbing and heating companies registered in Tamworth.
- Diverse Cooling Ltd2024
- DWH Gas Services Limited2015
- Eco Boiler Installation and Service Ltd2014
- Efficiency 1ST Limited2024
- Epik Air Ltd2018
- Farmco Building Services Ltd2026
- Few Air Conditioning Limited2013
- FS Air Conditioning Ltd2022
All plumbing and heating companies in Tamworth · All trades in Tamworth · Plumbers and heating engineers across the UK
Frequently asked questions
When are Diamond Project Management Limited's accounts due?
Diamond Project Management Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Diamond Project Management Limited'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 Diamond Project Management Limited still trading?
Diamond Project Management 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 Diamond Project Management Limited do?
Diamond Project Management Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Other specialised construction activities n.e.c. (SIC 43999).
How old is Diamond Project Management Limited?
Diamond Project Management Limited was incorporated on 17 September 2007, 19 years ago.
What is the penalty if Diamond Project Management 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 Diamond Project Management 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.