- Companies
- Specialist contractors
- Harrow
- ST Smart Construction Ltd
ST Smart Construction Ltd
- Company number
- 16203007
- Incorporated
- 23 Jan 20251 year trading
- Registered office
- 38 Belsize Road, Harrow, HA3 6JJ
- Nature of business
- Other specialised construction activities n.e.c.
ST Smart Construction Ltd is a 1-year-old private limited company registered in Harrow, company number 16203007, one of 273 specialist construction companies in Harrow. Its next accounts are due at Companies House on 23 October 2026, and its first CT600 is due at HMRC on 22 January 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 ST Smart Construction Ltd is registered
The registered office is in Harrow (HA3), in the Harrow local authority area, London. Show HA3 6JJ on a map.
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What happens if ST Smart 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 23 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 24 Oct 2026 to 23 Nov 2026 | £150 |
| 1 to 3 months late | 24 Nov 2026 to 23 Jan 2027 | £375 |
| 3 to 6 months late | 24 Jan 2027 to 23 Apr 2027 | £750 |
| More than 6 months late | From 24 Apr 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
- 16203007
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 January 2025 (1 year ago)
- Registered office
- 38 Belsize Road, Harrow, HA3 6JJ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 January (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 22 January 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Harrow
Other active specialist construction companies registered in Harrow.
- Stabuild Ltd2016
- Stapleton Contracts Ltd2023
- Starr Builders Limited2021
- Stoian Projects Ltd2023
- Stratfield Construction Services Limited2019
- Sunray Ventures Ltd1997
- Superior Drylining Limited2024
- Surduk Construction Ltd2024
All specialist construction companies in Harrow · All trades in Harrow · Specialist contractors across the UK
Frequently asked questions
When are ST Smart Construction Ltd's accounts due?
ST Smart Construction Ltd's next accounts are due at Companies House by 23 October 2026 (in 10 days), covering the period to 31 January 2026.
When is ST Smart Construction 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 22 January 2026, due by 22 January 2027, and one for the period to 31 January 2026, due by 31 January 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is ST Smart Construction Ltd still trading?
ST Smart 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 ST Smart Construction Ltd do?
ST Smart Construction Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is ST Smart Construction Ltd?
ST Smart Construction Ltd was incorporated on 23 January 2025, 1 year ago.
What is the penalty if ST Smart 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 ST Smart 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.