- Companies
- Plumbers and heating engineers
- Barnet
- A&B Mechanical Services Limited
A&B Mechanical Services Limited
- Company number
- 06296068
- Incorporated
- 28 Jun 200719 years trading
- Registered office
- 1 Rosslyn Avenue, East Barnet, Barnet, EN4 8DH
- Nature of business
- Plumbing, heat and air-conditioning installation
A&B Mechanical Services Limited is a 19-year-old private limited company registered in Barnet, company number 06296068, one of 75 plumbing and heating companies in Barnet. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for A&B Mechanical Services LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £9,908 (-11%) on the year before, to £80K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £87K against £16K owed within a year: 5.4 times cover.
- 4 employees on average, up from 3 the year before.
- 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 |
|---|---|---|---|---|---|
| 30 Jun 2025 | £80K | £87K | £16K | 4 | |
| 30 Jun 2024 | £90K | £116K | £37K | 3 | |
| 30 Jun 2023 | £47K | £63K | £30K | 3 | |
| 30 Jun 2022 | £59K | £52K | £8,038 | 4 | |
| 30 Jun 2021 | £118K | £55K | £23K | 3 | |
| 30 Jun 2020 | £147K | £159K | £62K | 5 | |
| 30 Jun 2019 | £12K | £112K | £118K | ||
| 30 Jun 2018 | £38K | £71K | £109K | ||
| 30 Jun 2017 | -£48K | £20K | £20K | £81K | |
| 30 Jun 2016 | £562 | £82K | £140K | £140K |
Where A&B Mechanical Services Limited is registered
The registered office is in Barnet (EN4), in the Barnet local authority area, London. Show EN4 8DH on a map.
Other trade companies in EN4
- Mechanica Frequentia Calculi LtdElectricians
- Conrad Cleaning LimitedCleaning companies
- Vreto & Co LtdCleaning companies
- Reclaim Automotive UK LtdMotor traders
- We Love 500'S LimitedMechanics and garages
- Vanta Gas & Heating LtdBuilders
- T C Developments LtdProperty developers
- Xran LtdBuilders
Also registered at this address
3 other companies use the same registered office as A&B Mechanical Services Limited.
- A & B London Construction Services LimitedBuilders
- A Star Vehicle Systems LtdMechanics and garages
- Astarnumberplates LimitedMotor traders
What happens if A&B 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 06296068
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 June 2007 (19 years ago)
- Registered office
- 1 Rosslyn Avenue, East Barnet, Barnet, EN4 8DH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 1 January 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 Barnet
Other active plumbing and heating companies registered in Barnet.
- Aa Plumbing Services Ltd2016
- Abcplumbing Ltd2025
- Ace Plumbing & Services Ltd2025
- Aedis Heating Ltd2020
- Ag Services (London) Limited2007
- Alpha Heat Limited2003
- Alpha Plumbing Group Ltd2025
- Aquakare Limited1999
All plumbing and heating companies in Barnet · All trades in Barnet · Plumbers and heating engineers across the UK
Frequently asked questions
When are A&B Mechanical Services Limited's accounts due?
A&B Mechanical Services Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is A&B Mechanical Services Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is A&B Mechanical Services Limited still trading?
A&B 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 A&B Mechanical Services Limited do?
A&B Mechanical Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is A&B Mechanical Services Limited?
A&B Mechanical Services Limited was incorporated on 28 June 2007, 19 years ago.
What is the penalty if A&B 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 A&B 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.