- Company number
- 08359522
- Incorporated
- 14 Jan 201313 years trading
- Registered office
- Devonshire House, 582 Honeypot Lane, Stanmore, Middlesex, HA7 1JS
- Nature of business
- Construction of domestic buildings
Harnam Construction Ltd is a 13-year-old private limited company registered in Stanmore, company number 08359522, one of 198 building contractors in Stanmore. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £113K (+21.2%) on the year before, to £647K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £802K against £154K owed within a year: 5.2 times cover.
- 5 employees on average during the year.
- 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 |
|---|---|---|---|---|---|
| 31 Jan 2025 | £647K | £34K | £802K | £154K | 5 |
| 31 Jan 2024 | £533K | £62K | £747K | £202K | 5 |
| 31 Jan 2023 | £372K | £52K | £528K | £130K | 5 |
| 31 Jan 2022 | £329K | £8,397 | £450K | £91K | 8 |
| 31 Jan 2021 | £307K | £12K | £473K | £140K | 8 |
| 31 Jan 2020 | £191K | £56K | £339K | £158K | 8 |
| 31 Jan 2019 | £75K | £18K | £148K | £85K | 8 |
| 31 Jan 2018 | £88K | £28K | £116K | £43K | 10 |
| 31 Jan 2017 | £72K | £35K | £96K | £31K | 8 |
| 31 Jan 2016 | £59K | £38K | £84K | £35K |
Where Harnam Construction Ltd is registered
The registered office is in Stanmore (HA7), in the Harrow local authority area, London. Show HA7 1JS on a map.
Other trade companies in HA7
- Vatra Developments LtdBuilders
- Air and Waves LtdPlumbers and heating engineers
- R & R Building Services LtdFinishing trades
- Berculean BBV Ltd LtdBuilders
- Velorent LtdMotor traders
- Autex LtdMechanics and garages
- TH Motorcycles LtdMotor traders
- Ady Painting and Decorating LtdInstallers
Shared registered office
113 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 Harnam Construction 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 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 08359522
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 January 2013 (13 years ago)
- Registered office
- Devonshire House, 582 Honeypot Lane, Stanmore, Middlesex, HA7 1JS
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 14 January 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Stanmore
Other active building contractors registered in Stanmore.
- Hirani Building Solutions Limited2011
- HK Jesani Limited2017
- Iany Building Ltd2021
- Icc Construction Ltd2026
- Ifs. Construction Ltd2020
- Imperiallglass Ltd2024
- J McMahon Limited2012
- Jack the Man Maintenance Ltd2024
All building contractors in Stanmore · All trades in Stanmore · Builders across the UK
Frequently asked questions
When are Harnam Construction Ltd's accounts due?
Harnam Construction Ltd's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is Harnam Construction Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Harnam Construction Ltd still trading?
Harnam Construction 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 Harnam Construction Ltd do?
Harnam Construction Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Harnam Construction Ltd?
Harnam Construction Ltd was incorporated on 14 January 2013, 13 years ago.
What is the penalty if Harnam Construction 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 Harnam Construction 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.