Company profile · Builders
JSB Building Limited
JSB Building Limited is a newly incorporated private limited company registered in London, company number 17323453, one of 12,075 building contractors in London. 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
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 JSB Building Limited is registered
The registered office is in London (SW9), in the Lambeth local authority area, London. Show SW9 0FN on a map.
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Also registered at this address
3 other companies use the same registered office as JSB Building Limited.
- Cornelius Beaumont LimitedFloor and wall tilers
- Life Form Construction LtdSpecialist contractors
- Pil1 LtdLandscapers and gardeners
What happens if JSB Building 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 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
- 17323453
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 July 2026
- Registered office
- 23 Alphabet Mews, London, SW9 0FN
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (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 London
Other active building contractors registered in London.
- JSB Project Ltd2021
- JSM Retail Sentinel Ltd2024
- JT Building Ltd2024
- JT Construction and Building Limited2026
- JT Contract Services Limited2022
- JTB Fire Ltd2026
- JTCR Building Solutions Ltd2022
- JTF Building Services Ltd2023
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are JSB Building Limited's accounts due?
JSB Building Limited's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is JSB Building Limited'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 JSB Building Limited still trading?
JSB Building 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 JSB Building Limited do?
JSB Building Limited is registered under Construction of domestic buildings (SIC 41202).
How old is JSB Building Limited?
JSB Building Limited was incorporated on 6 July 2026, less than a year ago.
What is the penalty if JSB Building 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 JSB Building 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.