- Companies
- Plumbers and heating engineers
- London
- Jar Mechanical Ltd
Jar Mechanical Ltd
- Company number
- 13859176
- Incorporated
- 19 Jan 20224 years trading
- Registered office
- 3RD Floor 86-90, Paul Street, London, EC2A 4NE
- Nature of business
- Plumbing, heat and air-conditioning installation
Jar Mechanical Ltd is a 4-year-old private limited company registered in London, company number 13859176, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 31 October 2027, and the CT600 for the period to 31 January 2027 is due at HMRC on 31 January 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 £28K (+13%) on the year before, to £245K.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £389K against £171K owed within a year: 2.3 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 Jan 2026 | £245K | £328K | £389K | £171K | 0 |
| 31 Jan 2025 | £217K | £253K | £330K | £139K | 3 |
| 31 Jan 2024 | £63K | £46K | £97K | £41K | 1 |
| 31 Jan 2023 | £7,936 | £18K | £21K | £13K | 0 |
Where Jar Mechanical Ltd is registered
The registered office is in London (EC2A), in the Hackney local authority area, London. Show EC2A 4NE on a map.
Other trade companies in EC2A
- Simlan Management LtdCleaning companies
- Renova Secure LtdBuilders
- Auraglasspartitions LtdGlaziers
- A2D Professional Cleaning LtdCleaning companies
- Matson Co. LtdProperty developers
- Paint Hub LimitedMechanics and garages
- SJK Construction & Management LtdBuilders
- Cenlora Cleaning Group LtdCleaning companies
Shared registered office
1,581 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Jar 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 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2027 to 30 Nov 2027 | £150 |
| 1 to 3 months late | 1 Dec 2027 to 31 Jan 2028 | £375 |
| 3 to 6 months late | 1 Feb 2028 to 30 Apr 2028 | £750 |
| More than 6 months late | From 1 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 13859176
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 January 2022 (4 years ago)
- Registered office
- 3RD Floor 86-90, Paul Street, London, EC2A 4NE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 7 November 2025
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 London
Other active plumbing and heating companies registered in London.
- Jas.Builds-Design Ltd2025
- Jat Utility Solutions Ltd2026
- Jats Site Services Ltd2024
- Javla Mechanical Limited2026
- Jay Plumbing & Heating Ltd2017
- Jay Signature Ltd2026
- Jaysam Heating Ltd2022
- JB Building Maintenance Ltd2020
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Jar Mechanical Ltd's accounts due?
Jar Mechanical Ltd's next accounts are due at Companies House by 31 October 2027 (in 383 days), covering the period to 31 January 2027.
When is Jar Mechanical Ltd's CT600 due?
The CT600 for the period to 31 January 2027 is due at HMRC by 31 January 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2027.
Is Jar Mechanical Ltd still trading?
Jar 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 Jar Mechanical Ltd do?
Jar Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Jar Mechanical Ltd?
Jar Mechanical Ltd was incorporated on 19 January 2022, 4 years ago.
What is the penalty if Jar 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 Jar 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.