Company profile · Builders
Zag Construct Ltd
Zag Construct Ltd is a 1-year-old private limited company registered in Harrow, company number 16556245, one of 793 building contractors in Harrow. Its next accounts are due at Companies House on 2 April 2027, and its first CT600 is due at HMRC on 1 July 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Zag Construct Ltd is registered
The registered office is in Harrow (HA1), in the Harrow local authority area, London. Show HA1 2LB on a map.
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- Call 'Em LimitedPlumbers and heating engineers
- Swan Roofing Services LimitedRoofers
- DRV Property Solutions LtdPainters and decorators
What happens if Zag Construct 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 2 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 3 Apr 2027 to 2 May 2027 | £150 |
| 1 to 3 months late | 3 May 2027 to 2 Jul 2027 | £375 |
| 3 to 6 months late | 3 Jul 2027 to 2 Oct 2027 | £750 |
| More than 6 months late | From 3 Oct 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
- 16556245
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 July 2025 (1 year ago)
- Registered office
- 55 Courtfield Avenue, Harrow, Middlesex, HA1 2LB
- Nature of business
- Construction of commercial buildings (SIC 41201)
Electrical installation (SIC 43210) - Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
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 Harrow
Other active building contractors registered in Harrow.
- Zameen Infrastructure Ltd2015
- Zanderland Construction Limited2023
- Zatila Construct Ltd2023
- Zeh Services Ltd2026
- 2L Development Limited2010
- 360Build Solutions Ltd2019
- 459 Rayners Lane Ltd2024
- A K Builders Limited2008
All building contractors in Harrow · All trades in Harrow · Builders across the UK
Frequently asked questions
When are Zag Construct Ltd's accounts due?
Zag Construct Ltd's next accounts are due at Companies House by 2 April 2027 (in 172 days), covering the period to 31 July 2026.
When is Zag Construct Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 1 July 2026, due by 1 July 2027, and one for the period to 31 July 2026, due by 31 July 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Zag Construct Ltd still trading?
Zag Construct Ltd is listed as active on the Companies House register (checked 12 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 Zag Construct Ltd do?
Zag Construct Ltd is registered under Construction of commercial buildings (SIC 41201); Electrical installation (SIC 43210).
How old is Zag Construct Ltd?
Zag Construct Ltd was incorporated on 2 July 2025, 1 year ago.
What is the penalty if Zag Construct 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 Zag Construct Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.