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- Mek Windows Ltd
Company profile · Installers
Mek Windows Ltd
Mek Windows Ltd is a 1-year-old private limited company registered in Watford, company number 16424129, one of 80 installation companies (insulation, lifts, shutters and similar) in Watford. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 31 March 2026, as filed at Companies House.
Where Mek Windows Ltd is registered
The registered office is in Watford (WD25), in the Watford local authority area, East of England. Show WD25 9BE on a map.
Other trade companies in WD25
- Ardel Construction LimitedBuilders
- Velocity Mechanical LtdPlumbers and heating engineers
- Jpjcm LimitedFinishing trades
- Mix & Go LtdSpecialist contractors
- Colney Prestige Autos LtdMotor traders
- Prestige Garden Services LtdLandscapers and gardeners
- Destinyd LtdMachinery repair and installation
- Leaf Space LimitedFinishing trades
What happens if Mek Windows 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 16424129
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 May 2025 (1 year ago)
- Registered office
- Flat 1, 2 Cow Lane, Watford, Hertfordshire, WD25 9BE
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 1 May 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Watford
Other active installation companies (insulation, lifts, shutters and similar) registered in Watford.
- Mobile Mechwall Solution Limited2024
- Modular Glass System Neo Ltd2015
- Mullen Ewi Limited2013
- Nextgen BMS Ltd2025
- Octa Construction Limited2013
- Oldsy Install Ltd2026
- Ovarian Ltd2026
- Ozbrand Limited2024
All installation companies (insulation, lifts, shutters and similar) in Watford · All trades in Watford · Installers across the UK
Frequently asked questions
When are Mek Windows Ltd's accounts due?
Mek Windows Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Mek Windows Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Mek Windows Ltd still trading?
Mek Windows 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 Mek Windows Ltd do?
Mek Windows Ltd is registered under Other construction installation (SIC 43290).
How old is Mek Windows Ltd?
Mek Windows Ltd was incorporated on 1 May 2025, 1 year ago.
What is the penalty if Mek Windows 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 Mek Windows 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.