K Mackie Windows and Doors Ltd
- Company number
- 16363040
- Incorporated
- 3 Apr 20251 year trading
- Registered office
- Blake Tower, Floor LG 12,, 2 Fann Street,, Barbican, London, EC2Y 8AF
- Nature of business
- Glazing; Other building completion and finishing
K Mackie Windows and Doors Ltd is a 1-year-old private limited company registered in Barbican, company number 16363040, one of the UK's glazing companies. 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 K Mackie Windows and Doors Ltd is registered
The registered office is in Barbican (EC2Y), in the City of London local authority area, London. Show EC2Y 8AF on a map.
Other trade companies in EC2Y
- Eco Track & Access LtdSpecialist contractors
- NJ Groundworks & Landscaping LtdCivil engineering
- Cannon Connect LtdCivil engineering
- Landform William Road LimitedProperty developers
- Franklin Building LtdSpecialist contractors
- V1 Scaffolding LtdFinishing trades
- Nigel Plumb Windows LtdGlaziers
- T Harris Plastering LtdPlasterers
Also registered at this address
12 other companies use the same registered office as K Mackie Windows and Doors Ltd.
- Ace Cleaning Solutions LtdCleaning companies
- Anthony Clack Electrical LtdElectricians
- Cannon Connect LtdCivil engineering
- Cannoncomm LtdCivil engineering
- Clearwater Connections LtdCivil engineering
- DPJ Scaffolding LtdFinishing trades
- Franklin Building LtdSpecialist contractors
- Julian Lambert Builder LtdSpecialist contractors
- Neil Graver Glazing LtdInstallers
- Nigel Plumb Windows LtdGlaziers
- NJ Groundworks & Landscaping LtdCivil engineering
- Proe Plastering LtdPlasterers
What happens if K Mackie Windows and Doors 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
- 16363040
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 April 2025 (1 year ago)
- Registered office
- Blake Tower, Floor LG 12,, 2 Fann Street,, Barbican, London, EC2Y 8AF
- Nature of business
- Glazing (SIC 43342)
Other building completion and finishing (SIC 43390) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 1 April 2026
Filing notes for glazing companies
Glazing companies often take deposits before work starts. Deposits held at the year end are a liability, not income, until the job is done.
Similar companies
Other active glazing companies.
Frequently asked questions
When are K Mackie Windows and Doors Ltd's accounts due?
K Mackie Windows and Doors Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is K Mackie Windows and Doors 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 K Mackie Windows and Doors Ltd still trading?
K Mackie Windows and Doors 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 K Mackie Windows and Doors Ltd do?
K Mackie Windows and Doors Ltd is registered under Glazing (SIC 43342); Other building completion and finishing (SIC 43390).
How old is K Mackie Windows and Doors Ltd?
K Mackie Windows and Doors Ltd was incorporated on 3 April 2025, 1 year ago.
What is the penalty if K Mackie Windows and Doors 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 K Mackie Windows and Doors 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.