- Company number
- 05500880
- Incorporated
- 6 Jul 200521 years trading
- Registered office
- Unit 3 Foxholes Farm, London Road, Hertford, SG13 7NT
- Nature of business
- Construction of domestic buildings
Windowman & Sons Limited is a 21-year-old private limited company registered in Hertford, company number 05500880, one of 60 building contractors in Hertford. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 Windowman & Sons 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 £27K (-62.5%) on the year before, to £16K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £197K against £198K owed within a year: 1.0 times cover.
- 5 employees on average, down 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 |
|---|---|---|---|---|---|
| 31 Jul 2025 | £16K | £5,411 | £197K | £198K | 5 |
| 31 Jul 2024 | £44K | £5,411 | £185K | £146K | 7 |
| 31 Jul 2023 | £41K | £30K | £246K | £198K | 7 |
| 31 Jul 2022 | £3,147 | £29K | £212K | £196K | 7 |
| 31 Jul 2021 | £173K | £67K | £380K | £183K | 7 |
| 31 Jul 2020 | £36K | £7,552 | £163K | £102K | 3 |
| 31 Jul 2019 | £25K | £100 | £139K | £151K | 3 |
| 31 Jul 2018 | £559 | £100 | £122K | £162K | 4 |
| 31 Jul 2017 | £24K | £100 | £104K | £156K | |
| 31 Jul 2016 | £21K | £100 | £11K | £19K |
Where Windowman & Sons Limited is registered
The registered office is in Hertford (SG13), in the East Hertfordshire local authority area, East of England. Show SG13 7NT on a map.
Other trade companies in SG13
- D&M Solutions LtdCleaning companies
- Greenpassionlandscapes LtdLandscapers and gardeners
- Nexum Fire & Security LimitedElectricians
- Bullrig Electrical Services LtdElectricians
- Rule One Hold LimitedCleaning companies
- Simpson and West Construction LtdBuilders
- Better Utility Services LtdCivil engineering
- Herts Caravan Services LtdMachinery repair and installation
What happens if Windowman & 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 05500880
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 July 2005 (21 years ago)
- Registered office
- Unit 3 Foxholes Farm, London Road, Hertford, SG13 7NT
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 28 November 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
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 Hertford
Other active building contractors registered in Hertford.
- WRN Construction Ltd2023
- A Star Builders & Maintenance Ltd2017
- Ad Carpentry and Building (Hertford) Ltd2026
- Alda Property Limited2012
- Amwell Heath Construction Ltd2024
- Atb Civils Limited2019
- Bourke Construction London Ltd2014
- BPM Contracts Services Ltd2024
All building contractors in Hertford · All trades in Hertford · Builders across the UK
Frequently asked questions
When are Windowman & Sons Limited's accounts due?
Windowman & Sons Limited's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Windowman & Sons Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Windowman & Sons Limited still trading?
Windowman & 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 Windowman & Sons Limited do?
Windowman & Sons Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Windowman & Sons Limited?
Windowman & Sons Limited was incorporated on 6 July 2005, 21 years ago.
What is the penalty if Windowman & 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 Windowman & 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.