- Companies
- Plumbers and heating engineers
- Wimbledon
- H&H Mechanical Ltd
H&H Mechanical Ltd
- Company number
- 13700716
- Incorporated
- 25 Oct 20214 years trading
- Registered office
- Suite 423 Highland House, 165-167 the Broadway, Wimbledon, London, SW19 1NE
- Nature of business
- Plumbing, heat and air-conditioning installation
H&H Mechanical Ltd is a 4-year-old private limited company registered in Wimbledon, company number 13700716, one of 14 plumbing and heating companies in Wimbledon. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £192K (+45.6%) on the year before, to £612K.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £814K against £218K owed within a year: 3.7 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £612K | £557K | £814K | £218K | 0 |
| 31 Oct 2024 | £421K | £410K | £546K | £149K | 7 |
| 31 Oct 2023 | £274K | £364K | £130K | 6 | |
| 31 Oct 2022 | £126K | £191K | £91K | 7 |
Where H&H Mechanical Ltd is registered
The registered office is in Wimbledon (SW19), in the Merton local authority area, London. Show SW19 1NE on a map.
Other trade companies in SW19
- Firstfixlondon Ltd.Builders
- Rainbow One Construction UK LtdSpecialist contractors
- Base Bloc LimitedBuilders
- Concealed Climate LimitedPlumbers and heating engineers
- Morningside LtdProperty developers
- Cupi-Building LtdBuilders
- Crown Infra London LtdBuilders
- Aj & Co One LtdProperty developers
What happens if H&H Mechanical 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 13700716
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 October 2021 (4 years ago)
- Registered office
- Suite 423 Highland House, 165-167 the Broadway, Wimbledon, London, SW19 1NE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 21 April 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 Wimbledon
Other active plumbing and heating companies registered in Wimbledon.
- Industrial Pipefreezing Services Limited1983
- Kingshott Boiler Care Ltd2024
- Max Heat Home Solutions Ltd2021
- Nexus Build Hub (UK) Limited2025
- NJP Plumbing Limited2007
- P.S.Baker Limited2001
- R.W.Miller Plumbing & Heating Ltd2023
- The London Fireplaces Ltd2016
All plumbing and heating companies in Wimbledon · All trades in Wimbledon · Plumbers and heating engineers across the UK
Frequently asked questions
When are H&H Mechanical Ltd's accounts due?
H&H Mechanical Ltd's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is H&H Mechanical Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is H&H Mechanical Ltd still trading?
H&H Mechanical 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 H&H Mechanical Ltd do?
H&H Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is H&H Mechanical Ltd?
H&H Mechanical Ltd was incorporated on 25 October 2021, 4 years ago.
What is the penalty if H&H Mechanical 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 H&H Mechanical 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.