- Companies
- Plumbers and heating engineers
- Woking
- Martin O'Connor Installation Services Ltd
Martin O'Connor Installation Services Ltd
- Company number
- 14417484
- Incorporated
- 13 Oct 20224 years trading
- Registered office
- Unit 4D, Lansbury Business Estate 102 Lower Guildford Road, Knaphill, Woking, Surrey, GU21 2EP
- Nature of business
- Plumbing, heat and air-conditioning installation
Martin O'Connor Installation Services Ltd is a 4-year-old private limited company registered in Woking, company number 14417484, one of 62 plumbing and heating companies in Woking. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 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 £70K (+25.7%) on the year before, to £342K.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £596K against £283K owed within a year: 2.1 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 4 years, 2023 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £342K | £335K | £596K | £283K | 0 |
| 31 Mar 2025 | £272K | £318K | £588K | £346K | 6 |
| 31 Mar 2024 | £150K | £182K | £384K | £248K | 5 |
| 31 Mar 2023 | £100 | £100 |
Where Martin O'Connor Installation Services Ltd is registered
The registered office is in Woking (GU21), in the Woking local authority area, South East. Show GU21 2EP on a map.
Other trade companies in GU21
- The Retro Emporium Services LimitedCleaning companies
- Ses Air Conditioning LtdPlumbers and heating engineers
- Hubdub Camper LimitedMotor traders
- Pristine Handover LimitedCleaning companies
- Orbis Trade LtdMotor traders
- Kingsmoor Systems LtdMachinery repair and installation
- SK Maintenance LtdSpecialist contractors
- JGT Scaffolding LimitedScaffolders
Also registered at this address
19 other companies use the same registered office as Martin O'Connor Installation Services Ltd.
- Accurate Mechanical Services LimitedMachinery repair and installation
- Ads Property Solutions LtdInstallers
- Alan Overton Builders LimitedBuilders
- Bramar LtdFacilities management
- D&D Reeve Brickwork LtdInstallers
- DJK Electrical Contractors LimitedElectricians
- James Riches LimitedFinishing trades
- JVS Cars of Distinction LtdMotor traders
- Lime Electrical Contractors LtdElectricians
- MB Landscapes & Paving LtdLandscapers and gardeners
- N D Williams LtdGroundworks and demolition
- Oakwood Installations LimitedInstallers
- Programme Advisory Services LtdCivil engineering
- Stallwood Building Services LimitedBuilders
- Surrey Hills Scaffolding Hire & Sales LimitedScaffolders
- T.A.S. Scaffolding LimitedScaffolders
- TL Gardening & Landscaping Services LimitedLandscapers and gardeners
- Whiteman & Sons LtdScaffolders
- Yateley Construction Properties LimitedProperty developers
What happens if Martin O'Connor Installation 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 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
- 14417484
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 October 2022 (4 years ago)
- Registered office
- Unit 4D, Lansbury Business Estate 102 Lower Guildford Road, Knaphill, Woking, Surrey, GU21 2EP
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 23 February 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 Woking
Other active plumbing and heating companies registered in Woking.
- Mayford Mechanical Services Ltd2018
- MD Heating & Plumbing Surrey Limited2016
- Neighbourhood Plumbing Limited2026
- P M L Air Conditioning Limited1999
- PCPS Surrey Ltd2017
- Plumbing & Heating Surrey Ltd2025
- Plumbline Heating Ltd2020
- Polichilled Limited2026
All plumbing and heating companies in Woking · All trades in Woking · Plumbers and heating engineers across the UK
Frequently asked questions
When are Martin O'Connor Installation Services Ltd's accounts due?
Martin O'Connor Installation Services Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Martin O'Connor Installation Services Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Martin O'Connor Installation Services Ltd still trading?
Martin O'Connor Installation 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 Martin O'Connor Installation Services Ltd do?
Martin O'Connor Installation Services Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Martin O'Connor Installation Services Ltd?
Martin O'Connor Installation Services Ltd was incorporated on 13 October 2022, 4 years ago.
What is the penalty if Martin O'Connor Installation 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 Martin O'Connor Installation 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.