- Companies
- Plumbers and heating engineers
- Sheffield
- JK Mechanical Ltd
JK Mechanical Ltd
- Company number
- 11896316
- Incorporated
- 21 Mar 20197 years trading
- Registered office
- Unit 2, Rotherside Court Rotherside Road, Eckington, Sheffield, S21 4HL
- Nature of business
- Plumbing, heat and air-conditioning installation
JK Mechanical Ltd is a 7-year-old private limited company registered in Sheffield, company number 11896316, one of 305 plumbing and heating companies in Sheffield. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 JK Mechanical LtdOr 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 £21K (-50.2%) on the year before, to £21K.
- Net assets rose in 2 of 5 year-on-year comparisons on record.
- Current assets of £47K against £29K owed within a year: 1.7 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £21K | £24K | £47K | £29K | 0 |
| 31 Mar 2024 | £41K | £58K | £105K | £57K | 0 |
| 31 Mar 2023 | £86K | £28K | £127K | £25K | 0 |
| 31 Mar 2022 | £82K | £12K | £160K | £56K | 1 |
| 31 Mar 2021 | £89K | £62K | £206K | £87K | 1 |
| 31 Mar 2020 | £12K | £11K | £216K | £204K | 1 |
Where JK Mechanical Ltd is registered
The registered office is in Sheffield (S21), in the North East Derbyshire local authority area, East Midlands. Show S21 4HL on a map.
Other trade companies in S21
- Oak & Beam LimitedBuilders
- Precision Tree Care LimitedLandscapers and gardeners
- Trueshift Autos LtdMotor traders
- Flowright Services LtdPlumbers and heating engineers
- Crusade Part Solutions LtdMotor traders
- RMK Cooling Systems LimitedPlumbers and heating engineers
- Mills Capital LtdProperty developers
- Apex Integrity Access LtdScaffolders
Also registered at this address
7 other companies use the same registered office as JK Mechanical Ltd.
- Bitri Steel Fixing LimitedBuilders
- Core Interior Solutions LimitedJoiners and carpenters
- Fire Solutions Construction LtdInstallers
- Gleam Valeting LtdCleaning companies
- Intems LtdElectricians
- Jamie Martin Electrical LtdElectricians
- Urban Roofing Sheffield LimitedRoofers
What happens if JK 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 11896316
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 March 2019 (7 years ago)
- Registered office
- Unit 2, Rotherside Court Rotherside Road, Eckington, Sheffield, S21 4HL
- 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 2025
- Last confirmation statement
- 20 March 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 Sheffield
Other active plumbing and heating companies registered in Sheffield.
- Jllplumbing Limited2025
- John Mac Heating Ltd2023
- Joseph Barker Plumbing and Heating Ltd2022
- JPL Plumbing & Heating Yorkshire Ltd2022
- JR Plumbing and Heating Ltd2026
- JRH Refrigeration Ltd2021
- JRS Gas and Plumbing Services Limited2008
- JRS Heating Solutions Ltd2026
All plumbing and heating companies in Sheffield · All trades in Sheffield · Plumbers and heating engineers across the UK
Frequently asked questions
When are JK Mechanical Ltd's accounts due?
JK Mechanical Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is JK Mechanical Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is JK Mechanical Ltd still trading?
JK 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 JK Mechanical Ltd do?
JK Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is JK Mechanical Ltd?
JK Mechanical Ltd was incorporated on 21 March 2019, 7 years ago.
What is the penalty if JK 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 JK 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.