- Companies
- Electricians
- Doncaster
- H.S. Harbon & Sons Limited
H.S. Harbon & Sons Limited
- Company number
- 01296750
- Incorporated
- 2 Feb 197749 years trading
- Registered office
- Gordon Street, Doncaster, South Yorkshire, DN1 1RS
- Nature of business
- Electrical installation
H.S. Harbon & Sons Limited is a 49-year-old private limited company registered in Doncaster, company number 01296750, one of 215 electrical contractors in Doncaster. Its next accounts are due at Companies House on 29 February 2028, and the CT600 for the period to 31 May 2027 is due at HMRC on 31 May 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 £39K (+6.2%) on the year before, to £669K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £990K against £478K owed within a year: 2.1 times cover.
- 19 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2026 | £669K | £333K | £990K | £478K | 19 |
| 31 May 2025 | £629K | £111K | £888K | £422K | 19 |
| 31 May 2024 | £597K | £212K | £846K | £423K | 20 |
| 31 May 2023 | £552K | £0 | £988K | £550K | 21 |
| 31 May 2022 | £494K | £905K | £518K | 20 | |
| 31 May 2021 | £216K | £0 | £354K | £219K | 20 |
| 31 May 2020 | £190K | £11K | £671K | £544K | 15 |
| 31 Jul 2019 | £71K | £0 | £629K | £626K | 20 |
| 31 Jul 2018 | £312K | £848 | £792K | £635K | 20 |
| 31 Jul 2017 | £301K | £978 | £765K | £611K | 20 |
Public contracts won
H.S. Harbon & Sons Limited has one public sector contract award on record; the ones with their own published value total £42K (2025). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Armthorpe Parish Council | Armthorpe Community Centre Solar Panels | £42K | 16 Jul 2025 |
Where H.S. Harbon & Sons Limited is registered
The registered office is in Doncaster (DN1), in the Doncaster local authority area, Yorkshire and The Humber. Show DN1 1RS on a map.
Other trade companies in DN1
- Nacu Trans LtdMechanics and garages
- Highwind Developments LimitedFinishing trades
- Adzare Service LtdMechanics and garages
- Sukaj Construction LtdPlasterers
- Tobityres LimitedMechanics and garages
- Firmont Homes LtdBuilders
- Callerton Autos LtdMotor traders
- S & A Motor Vehicles LimitedMotor traders
What happens if H.S. Harbon & Sons 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 29 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2028 to 31 Mar 2028 | £150 |
| 1 to 3 months late | 1 Apr 2028 to 31 May 2028 | £375 |
| 3 to 6 months late | 1 Jun 2028 to 31 Aug 2028 | £750 |
| More than 6 months late | From 1 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 01296750
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 February 1977 (49 years ago)
- Registered office
- Gordon Street, Doncaster, South Yorkshire, DN1 1RS
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2026
- Last confirmation statement
- 18 July 2026
- Charges (mortgages)
- 2 outstanding of 2 registered
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Doncaster
Other active electrical contractors registered in Doncaster.
- Harworth Electrical Limited1967
- Hawleys Electrical Limited2012
- Hello Electrical Ltd2022
- Hirst Shaw Electrical Ltd2026
- Home Energy Counsel Ltd2020
- Howton Electrical Services Ltd2012
- Hte Engineering Ltd2025
- HV & Civils Management Ltd2022
All electrical contractors in Doncaster · All trades in Doncaster · Electricians across the UK
Frequently asked questions
When are H.S. Harbon & Sons Limited's accounts due?
H.S. Harbon & Sons Limited's next accounts are due at Companies House by 29 February 2028 (in 503 days), covering the period to 31 May 2027.
When is H.S. Harbon & Sons Limited's CT600 due?
The CT600 for the period to 31 May 2027 is due at HMRC by 31 May 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2028.
Is H.S. Harbon & Sons Limited still trading?
H.S. Harbon & Sons 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 H.S. Harbon & Sons Limited do?
H.S. Harbon & Sons Limited is registered under Electrical installation (SIC 43210).
How old is H.S. Harbon & Sons Limited?
H.S. Harbon & Sons Limited was incorporated on 2 February 1977, 49 years ago.
Has H.S. Harbon & Sons Limited won public sector contracts?
Yes. H.S. Harbon & Sons Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £42K), most recently from Armthorpe Parish Council.
What is the penalty if H.S. Harbon & Sons 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 H.S. Harbon & Sons 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.