- Companies
- Plumbers and heating engineers
- High Wycombe
- O'Connor Mechanical Services Ltd
O'Connor Mechanical Services Ltd
- Company number
- 17277029
- Incorporated
- 17 Jun 2026
- Registered office
- 18 Manor Courtyard, First Floor, Hughenden Avenue, High Wycombe, Buckinghamshire, HP13 5RE
- Nature of business
- Plumbing, heat and air-conditioning installation
O'Connor Mechanical Services Ltd is a newly incorporated private limited company registered in High Wycombe, company number 17277029, one of 120 plumbing and heating companies in High Wycombe. Its next accounts are due at Companies House on 17 March 2028, and its first CT600 is due at HMRC on 16 June 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where O'Connor Mechanical Services Ltd is registered
The registered office is in High Wycombe (HP13), in the Buckinghamshire local authority area, South East. Show HP13 5RE on a map.
Other trade companies in HP13
- HP13 6Ad LimitedProperty developers
- Rath’S Auto Care LtdMechanics and garages
- Danny Cleaning Solutions LtdCleaning companies
- Spec Plumbing and Heating LtdPlumbers and heating engineers
- S W Classics LtdMotor traders
- Groundedcarpetco LtdFinishing trades
- Ape's Gutters LtdRoofers
- Britannia Property Management LtdProperty developers
Also registered at this address
10 other companies use the same registered office as O'Connor Mechanical Services Ltd.
- BL Prime Scaffolding LimitedScaffolders
- JMC Heating and Plumbing LtdPlumbers and heating engineers
- Mfa Electrical LtdElectricians
- Ocs Heating and Gas LimitedBuilders
- Palmers Design & Build LtdBuilders
- S.W. Building and Carpentry LimitedInstallers
- SNG Plastering LimitedInstallers
- TMDB Investment 1 LimitedProperty developers
- TRGV Glass Glazing Windows & Doors LimitedGlaziers
- Upcycle Interiors LimitedProperty developers
What happens if O'Connor Mechanical Services 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 17 March 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 18 Mar 2028 to 17 Apr 2028 | £150 |
| 1 to 3 months late | 18 Apr 2028 to 17 Jun 2028 | £375 |
| 3 to 6 months late | 18 Jun 2028 to 17 Sep 2028 | £750 |
| More than 6 months late | From 18 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2028 | £200 |
| 3 months late | 30 Sep 2028 | another £200 |
| 6 months late | 30 Dec 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 17277029
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 June 2026
- Registered office
- 18 Manor Courtyard, First Floor, Hughenden Avenue, High Wycombe, Buckinghamshire, HP13 5RE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 June (accounting reference date)
- Accounts type
- No accounts filed yet
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 High Wycombe
Other active plumbing and heating companies registered in High Wycombe.
- On Tap Solutions Ltd2024
- Opulence Bathrooms and Heating Systems Ltd2025
- Paramount Plumbing Limited2003
- Paul Jones Plastering & Property Services Ltd2025
- Paul Newman Limited1993
- Pipe Work Installations Ltd2011
- PJC Gas Services Limited2023
- PLB Plumbing and Heating Limited2021
All plumbing and heating companies in High Wycombe · All trades in High Wycombe · Plumbers and heating engineers across the UK
Frequently asked questions
When are O'Connor Mechanical Services Ltd's accounts due?
O'Connor Mechanical Services Ltd's next accounts are due at Companies House by 17 March 2028 (in 522 days), covering the period to 30 June 2027.
When is O'Connor Mechanical Services Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 16 June 2027, due by 16 June 2028, and one for the period to 30 June 2027, due by 30 June 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is O'Connor Mechanical Services Ltd still trading?
O'Connor Mechanical Services 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 O'Connor Mechanical Services Ltd do?
O'Connor Mechanical Services Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is O'Connor Mechanical Services Ltd?
O'Connor Mechanical Services Ltd was incorporated on 17 June 2026, less than a year ago.
What is the penalty if O'Connor Mechanical Services 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 O'Connor Mechanical Services 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.