- Company number
- 16987444
- Incorporated
- 26 Jan 2026
- Registered office
- 82 Middleton Road, Morden, SM4 6RR
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings; Construction of railways and underground railways; Construction of other civil engineering projects n.e.c.
Siu Engineering Limited is a newly incorporated private limited company registered in Morden, company number 16987444, one of 191 building contractors in Morden. Its next accounts are due at Companies House on 26 October 2027, and its first CT600 is due at HMRC on 25 January 2028.
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 Siu Engineering Limited is registered
The registered office is in Morden (SM4), in the Merton local authority area, London. Show SM4 6RR on a map.
Other trade companies in SM4
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- Vip Autos London LtdMotor traders
- Apx Mobile Mechanics LimitedMechanics and garages
- Global Autos London LtdMotor traders
- Prana Projects LimitedBuilders
- Londons Build UK LtdBuilders
- Hilal Al Emarate Building Cont. and BLDG. Materials TRDG. LtdBuilders
- Parixon LtdElectricians
What happens if Siu Engineering 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 26 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 27 Oct 2027 to 26 Nov 2027 | £150 |
| 1 to 3 months late | 27 Nov 2027 to 26 Jan 2028 | £375 |
| 3 to 6 months late | 27 Jan 2028 to 26 Apr 2028 | £750 |
| More than 6 months late | From 27 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 16987444
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 January 2026
- Registered office
- 82 Middleton Road, Morden, SM4 6RR
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202)
Construction of railways and underground railways (SIC 42120)
Construction of other civil engineering projects n.e.c. (SIC 42990) - Year end
- 31 January (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 Morden
Other active building contractors registered in Morden.
- Sixfour Services Ltd2022
- Skora Construction Ltd2011
- SM Lofts & Extensions Ltd2023
- Solvex Engineering & Contracting Company Ltd.2024
- SS Construction Enterprise Ltd2024
- Stam 78 Construction Ltd2015
- Super Facilities Ltd2018
- Sureiam Limited2020
All building contractors in Morden · All trades in Morden · Builders across the UK
Frequently asked questions
When are Siu Engineering Limited's accounts due?
Siu Engineering Limited's next accounts are due at Companies House by 26 October 2027 (in 379 days), covering the period to 31 January 2027.
When is Siu Engineering Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 25 January 2027, due by 25 January 2028, and one for the period to 31 January 2027, due by 31 January 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Siu Engineering Limited still trading?
Siu Engineering 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 Siu Engineering Limited do?
Siu Engineering Limited is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202); Construction of railways and underground railways (SIC 42120); Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Siu Engineering Limited?
Siu Engineering Limited was incorporated on 26 January 2026, less than a year ago.
What is the penalty if Siu Engineering 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 Siu Engineering 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.