- Companies
- Plumbers and heating engineers
- Orpington
- Aidan McMahon Limited
Aidan McMahon Limited
- Company number
- 04750679
- Incorporated
- 1 May 200323 years trading
- Registered office
- 16 Marion Crescent, Orpington, Kent, BR5 2DD
- Nature of business
- Plumbing, heat and air-conditioning installation
Aidan McMahon Limited is a 23-year-old private limited company registered in Orpington, company number 04750679, one of 79 plumbing and heating companies in Orpington. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 up £581 (+23.5%) on the year before, to £3,052.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £869 against £2,444 owed within a year: 0.4 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 May 2025 | £3,052 | £869 | £869 | £2,444 | 0 |
| 31 May 2024 | £2,471 | £1,044 | £1,044 | £4,743 | 0 |
| 31 May 2023 | £1,173 | £1,193 | £5,064 | 1 | |
| 31 May 2022 | £3,899 | £4,314 | £5,304 | 1 | |
| 31 May 2021 | £5,187 | £4,001 | £4,461 | 1 | |
| 31 May 2020 | £5,774 | £4,294 | £5,712 | 2 | |
| 31 May 2019 | £558 | £2,950 | £2,638 | 2 | |
| 31 May 2018 | £844 | £1,900 | £1,384 | ||
| 31 May 2017 | £2,358 | £2,565 | £644 | ||
| 31 May 2016 | £1,956 | £3,338 | £3,338 | £1,965 |
Where Aidan McMahon Limited is registered
The registered office is in Orpington (BR5), in the Bromley local authority area, London. Show BR5 2DD on a map.
Other trade companies in BR5
- SML Resources LtdMechanics and garages
- A.P.E. Maintenance LtdFacilities management
- Daisy Fresh LtdCleaning companies
- GCP FM Group LtdFacilities management
- Enp Global LtdBuilders
- Hawk Landscapes LtdLandscapers and gardeners
- Rankins Roofing LtdRoofers
- Jet Clear Drainage Solutions LtdCleaning companies
Also registered at this address
14 other companies use the same registered office as Aidan McMahon Limited.
- A.C. Services (Kent) LimitedPlumbers and heating engineers
- Chestnut Design & Build LtdBuilders
- Fairweather Pool Services LimitedPlumbers and heating engineers
- Havard Gas Services LimitedPlumbers and heating engineers
- K L Decorators LimitedPainters and decorators
- KB Electrical South East LtdElectricians
- L and Sons UPVC LimitedSpecialist contractors
- N J Contracting Services LimitedElectricians
- P.C. Roofing LimitedRoofers
- Premier (London) Building Services LtdFinishing trades
- RBF Installations GBR LimitedPlumbers and heating engineers
- Richard Seymour Roofing Services LtdFacilities management
- RPM (South East) LimitedBuilders
- Sumner Building Services LimitedElectricians
What happens if Aidan McMahon 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 04750679
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 May 2003 (23 years ago)
- Registered office
- 16 Marion Crescent, Orpington, Kent, BR5 2DD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 1 May 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 Orpington
Other active plumbing and heating companies registered in Orpington.
- Ajb Heating Limited2018
- Ajc Heating & Gas Limited2018
- Aquis Mechanical Ltd2023
- Arflo Ltd2023
- Artisan Pipework Ltd2010
- Arw Heating & Plumbing Ltd2012
- Ashrose Drainage Limited2002
- B & H Building & Installations Limited2015
All plumbing and heating companies in Orpington · All trades in Orpington · Plumbers and heating engineers across the UK
Frequently asked questions
When are Aidan McMahon Limited's accounts due?
Aidan McMahon Limited's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Aidan McMahon Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Aidan McMahon Limited still trading?
Aidan McMahon 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 Aidan McMahon Limited do?
Aidan McMahon Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Aidan McMahon Limited?
Aidan McMahon Limited was incorporated on 1 May 2003, 23 years ago.
What is the penalty if Aidan McMahon 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 Aidan McMahon 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.