- Companies
- Plumbers and heating engineers
- Fareham
- D.S.R. Mechanical Services Limited
D.S.R. Mechanical Services Limited
- Company number
- 04641636
- Incorporated
- 20 Jan 200323 years trading
- Registered office
- Unit G1 Mayles Lane, Knowle, Fareham, PO17 5DY
- Nature of business
- Plumbing, heat and air-conditioning installation
D.S.R. Mechanical Services Limited is a 23-year-old private limited company registered in Fareham, company number 04641636, one of 119 plumbing and heating companies in Fareham. Its next accounts are due at Companies House on 31 October 2027, and the CT600 for the period to 31 January 2027 is due at HMRC on 31 January 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 £207K (+124.4%) on the year before, to £374K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £598K against £259K owed within a year: 2.3 times cover.
- 9 employees on average, up from 8 the year before.
- Balance sheets on record for 10 years, 2016 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2026 | £374K | £309K | £598K | £259K | 9 |
| 31 Jan 2025 | £166K | £123K | £371K | £248K | 8 |
| 31 Jan 2024 | £296K | £200K | £558K | £285K | 6 |
| 31 Jan 2023 | £108K | £92K | £336K | £251K | 6 |
| 31 Jan 2022 | £135K | £44K | £271K | £162K | 5 |
| 31 Jan 2021 | £53K | £51K | £230K | £165K | 5 |
| 30 Sep 2019 | £40K | £116K | £352K | £317K | 5 |
| 30 Sep 2018 | £76K | £6,677 | £317K | £242K | 5 |
| 30 Sep 2017 | £79K | £27K | £217K | £139K | 4 |
| 30 Sep 2016 | £54K | £134K | £219K | £166K |
Public contracts won
D.S.R. Mechanical Services Limited has 9 public sector contract awards on record; the ones with their own published value total £678K, from 2023 to 2026. Source: Contracts Finder and Find a Tender award notices.
Awards by year
Main buyers
- Hampshire County Council7 awards
- NHS Property Services Limited1 award
- University of Southampton1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Hampshire County Council | Waterside Primary School Heating Upgrade | £94K | 22 Jun 2026 |
| Hampshire County Council | Toynbee School - Upgrade Heating to Theatre | £65K | 20 May 2026 |
| Hampshire County Council | Hatch Warren Infant School - Ventilation Improvements | £66K | 19 May 2026 |
| NHS Property Services Limited | Hot Water System & Roof Ventilation Works at Blackbird Leys Health Centre | £63K | 24 Apr 2026 |
| Hampshire County Council | Fair Oak Junior School- Boiler Upgrade | £105K | 22 Apr 2026 |
| Hampshire County Council | Leesland CE (C) Infant School - Boiler Upgrade | £80K | 22 Apr 2026 |
| Hampshire County Council | Kempshott Junior School - Domestic Water Pipework Upgrade | £39K | 12 Mar 2026 |
| Hampshire County Council | Kempshott Junior School - Domestic Water Pipework Upgrade | £39K | 12 Mar 2026 |
| University of Southampton | B178 Instatement of Hydraulic Pumps and Associated Enabling Works | £128K | 22 Aug 2023 |
Where D.S.R. Mechanical Services Limited is registered
The registered office is in Fareham (PO17), in the Winchester local authority area, South East. Show PO17 5DY on a map.
Other trade companies in PO17
- Roofing Transformers LtdRoofers
- JFS Building Services LtdLandscapers and gardeners
- Jacobs Auto Repairs LtdMechanics and garages
- JK Land & Property LtdProperty developers
- A R Banks Civil Engineering LtdCivil engineering
- Hounds Maintenance Solutions LtdMechanics and garages
- The Coastal Exterior Company LtdCleaning companies
- Bere Forest Tree Services & Milling LtdLandscapers and gardeners
What happens if D.S.R. Mechanical Services 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 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2027 to 30 Nov 2027 | £150 |
| 1 to 3 months late | 1 Dec 2027 to 31 Jan 2028 | £375 |
| 3 to 6 months late | 1 Feb 2028 to 30 Apr 2028 | £750 |
| More than 6 months late | From 1 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 04641636
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 January 2003 (23 years ago)
- Registered office
- Unit G1 Mayles Lane, Knowle, Fareham, PO17 5DY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 12 February 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
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 Fareham
Other active plumbing and heating companies registered in Fareham.
- Darren Edwards Gas Services Limited2016
- DCG Gas Solutions Ltd2010
- Diamond Green Energy Limited2011
- Draco Gas & Heating Limited2021
- Drawlim Services Ltd2025
- Dunlop Plumbing, Heating & Gas Services Ltd.2007
- Ecoairfit Ltd2026
- Ee Ashp Limited2025
All plumbing and heating companies in Fareham · All trades in Fareham · Plumbers and heating engineers across the UK
Frequently asked questions
When are D.S.R. Mechanical Services Limited's accounts due?
D.S.R. Mechanical Services Limited's next accounts are due at Companies House by 31 October 2027 (in 383 days), covering the period to 31 January 2027.
When is D.S.R. Mechanical Services Limited's CT600 due?
The CT600 for the period to 31 January 2027 is due at HMRC by 31 January 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2027.
Is D.S.R. Mechanical Services Limited still trading?
D.S.R. Mechanical Services 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 D.S.R. Mechanical Services Limited do?
D.S.R. Mechanical Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is D.S.R. Mechanical Services Limited?
D.S.R. Mechanical Services Limited was incorporated on 20 January 2003, 23 years ago.
Has D.S.R. Mechanical Services Limited won public sector contracts?
Yes. D.S.R. Mechanical Services Limited has 9 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £678K), most recently from Hampshire County Council.
What is the penalty if D.S.R. Mechanical Services 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 D.S.R. Mechanical Services 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.