- Companies
- Specialist contractors
- London
- TSN Building Contractors Limited
TSN Building Contractors Limited
- Company number
- 11341453
- Incorporated
- 2 May 20188 years trading
- Registered office
- Accountancy House, 90 Walworth Road, London, SE1 6SW
- Nature of business
- Other specialised construction activities n.e.c.
TSN Building Contractors Limited is a 8-year-old private limited company registered in London, company number 11341453, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £47K on the year before, to £47K.
- Net assets rose in 3 of 6 year-on-year comparisons on record.
- Current assets of £132K against £103K owed within a year: 1.3 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £47K | £132K | £103K | 0 | |
| 1 Jun 2024 | £299 | £29K | £29K | 1 | |
| 1 Jun 2023 | -£5,954 | £28K | £36K | 1 | |
| 1 Jun 2022 | £156 | £37K | £39K | 1 | |
| 1 Jun 2021 | -£295 | £45K | £47K | 1 | |
| 1 Jun 2020 | £127 | £35K | £37K | 1 | |
| 1 Jun 2019 | £277 | £21K | £22K | 1 |
Where TSN Building Contractors Limited is registered
The registered office is in London (SE1), in the Southwark local authority area, London. Show SE1 6SW on a map.
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- Green Lane Cobham LtdProperty developers
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Also registered at this address
12 other companies use the same registered office as TSN Building Contractors Limited.
- Akarana Builders LimitedProperty developers
- Amelie Freya LtdFinishing trades
- Boutique Construction and Development LimitedProperty developers
- Circuitfix Solutions LimitedElectricians
- Crom LimitedCleaning companies
- Falcon Partners LtdBuilders
- Hamhall LimitedProperty developers
- Just Fire Doors LtdJoiners and carpenters
- Macauley Cleaning Services LimitedCleaning companies
- MK Gowers LimitedSpecialist contractors
- Rudraksh LimitedElectricians
- York Express Cleaning LtdCleaning companies
What happens if TSN Building Contractors 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 11341453
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 May 2018 (8 years ago)
- Registered office
- Accountancy House, 90 Walworth Road, London, SE1 6SW
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 1 May 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 London
Other active specialist construction companies registered in London.
- TST Construction Ltd2019
- TT Build Ltd2021
- TTTK Construction Ltd2026
- Tu Golden Hills Ltd2023
- Tudor Rose Group Ltd2025
- Tufnell Maintenance & Renovations Ltd2024
- Tunad Limited2023
- Tunaj Decorating & Property Management Services Limited2023
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are TSN Building Contractors Limited's accounts due?
TSN Building Contractors Limited's next accounts are due at Companies House by 28 February 2027 (in 137 days), covering the period to 31 May 2026.
When is TSN Building Contractors Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is TSN Building Contractors Limited still trading?
TSN Building Contractors 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 TSN Building Contractors Limited do?
TSN Building Contractors Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is TSN Building Contractors Limited?
TSN Building Contractors Limited was incorporated on 2 May 2018, 8 years ago.
What is the penalty if TSN Building Contractors 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 TSN Building Contractors 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.