- Companies
- Installers
- London
- CSC Build Ltd
CSC Build Ltd
- Company number
- 17398929
- Incorporated
- 13 Aug 2026
- Registered office
- 27 Old Gloucester Street, London, WC1N 3AX
- Nature of business
- Other construction installation
CSC Build Ltd is a newly incorporated private limited company registered in London, company number 17398929, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 13 May 2028, and its first CT600 is due at HMRC on 12 August 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 CSC Build Ltd is registered
The registered office is in London (WC1N), in the Camden local authority area, London. Show WC1N 3AX on a map.
Other trade companies in WC1N
- JDB Consult LtdProperty developers
- Pixie Marine LimitedMachinery repair and installation
- Old Man Edition LtdFloor and wall tilers
- Wise Choice Security LimitedMechanics and garages
- Prime Coating Services LtdMotor traders
- Strive Lands LtdProperty developers
- Statom LimitedBuilders
- Jose Galvez LtdRepair services
Shared registered office
554 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if CSC Build 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 13 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 14 May 2028 to 13 Jun 2028 | £150 |
| 1 to 3 months late | 14 Jun 2028 to 13 Aug 2028 | £375 |
| 3 to 6 months late | 14 Aug 2028 to 13 Nov 2028 | £750 |
| More than 6 months late | From 14 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17398929
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 August 2026
- Registered office
- 27 Old Gloucester Street, London, WC1N 3AX
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
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 London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- CT Built Limited2019
- CT Pro Build Ltd2025
- CTF Management Limited2014
- CTQ Construction & Maintenance Ltd2021
- Cutul Ltd2023
- Cva Joinery Ltd2019
- D C Timbury Limited2022
- D First Choice Ltd2023
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are CSC Build Ltd's accounts due?
CSC Build Ltd's next accounts are due at Companies House by 13 May 2028 (in 579 days), covering the period to 31 August 2027.
When is CSC Build 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 12 August 2027, due by 12 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is CSC Build Ltd still trading?
CSC Build 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 CSC Build Ltd do?
CSC Build Ltd is registered under Other construction installation (SIC 43290).
How old is CSC Build Ltd?
CSC Build Ltd was incorporated on 13 August 2026, less than a year ago.
What is the penalty if CSC Build 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 CSC Build 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.