- Companies
- Plumbers and heating engineers
- Gainsborough
- JH Smithson & Son Limited
JH Smithson & Son Limited
- Company number
- 04871897
- Incorporated
- 19 Aug 200323 years trading
- Registered office
- Work Store Church Lane, Corringham, Gainsborough, Lincolnshire, DN21 5RA
- Nature of business
- Plumbing, heat and air-conditioning installation
JH Smithson & Son Limited is a 23-year-old private limited company registered in Gainsborough, company number 04871897, one of 37 plumbing and heating companies in Gainsborough. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 JH Smithson & Son 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 £49K (-81.1%) on the year before, to £11K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £83K against £119K owed within a year: 0.7 times cover.
- 8 employees on average, up from 7 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 Sep 2025 | £11K | £3,456 | £83K | £119K | 8 |
| 30 Sep 2024 | £61K | £2,758 | £119K | £116K | 7 |
| 30 Sep 2023 | £58K | £23K | £159K | £121K | 5 |
| 30 Sep 2022 | £101K | £13K | £185K | £114K | 7 |
| 30 Sep 2021 | £137K | £28K | £225K | £119K | 5 |
| 30 Sep 2020 | £118K | £104K | £209K | £128K | 5 |
| 30 Sep 2019 | £175K | £53K | £314K | £182K | 5 |
| 30 Sep 2018 | £275K | £91K | £321K | £81K | 5 |
| 30 Sep 2017 | £223K | £125K | £342K | £145K | 5 |
| 30 Sep 2016 | £219K | £174K | £317K | £112K |
Public contracts won
JH Smithson & Son Limited has one public sector contract award on record (2023). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Lincolnshire County Council | Disabled Facilities Grant (DFG) Framework | Ceiling, not shown | 7 Feb 2023 |
Where JH Smithson & Son Limited is registered
The registered office is in Gainsborough (DN21), in the West Lindsey local authority area, East Midlands. Show DN21 5RA on a map.
Other trade companies in DN21
- The Car Buyer LtdMotor traders
- Craig Rudge Electrical LtdElectricians
- San San Properties & Developments LtdBuilders
- Pages Garage LtdMechanics and garages
- Elite Touch Home Cleaning LtdCleaning companies
- Gregelec LimitedElectricians
- DRM 2026 LimitedMotor traders
- Elite Carpet Care Gainsborough LtdCleaning companies
What happens if JH Smithson & Son 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 04871897
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 August 2003 (23 years ago)
- Registered office
- Work Store Church Lane, Corringham, Gainsborough, Lincolnshire, DN21 5RA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 28 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 Gainsborough
Other active plumbing and heating companies registered in Gainsborough.
- Josa Renewables Ltd2025
- Josa-Ac Services Ltd2020
- JRBC Install & Servicing Ltd2025
- Knowles Plumbing, Heating & Mechanical Services Ltd2025
- Lincs Electrical & Plumbing Engineers Limited2005
- M D Hoyland Limited2015
- Mark Wood Heating Ltd2003
- N Proctor Plumbing and Heating Limited2016
All plumbing and heating companies in Gainsborough · All trades in Gainsborough · Plumbers and heating engineers across the UK
Frequently asked questions
When are JH Smithson & Son Limited's accounts due?
JH Smithson & Son Limited's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is JH Smithson & Son Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is JH Smithson & Son Limited still trading?
JH Smithson & Son 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 JH Smithson & Son Limited do?
JH Smithson & Son Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is JH Smithson & Son Limited?
JH Smithson & Son Limited was incorporated on 19 August 2003, 23 years ago.
Has JH Smithson & Son Limited won public sector contracts?
Yes. JH Smithson & Son Limited has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from Lincolnshire County Council.
What is the penalty if JH Smithson & Son 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 JH Smithson & Son 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.