- Companies
- Electricians
- London
- TSJ Building Services (Electrical) Ltd
TSJ Building Services (Electrical) Ltd
- Company number
- 07881517
- Incorporated
- 14 Dec 201114 years trading
- Registered office
- 122 ST Pancras Way, London, NW1 9NB
- Nature of business
- Electrical installation
TSJ Building Services (Electrical) Ltd is a 14-year-old private limited company registered in London, company number 07881517, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £1,343 (+18.9%) on the year before, to £8,462.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £14K against £2,040 owed within a year: 6.9 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £8,462 | £14K | £2,040 | 1 | |
| 31 Dec 2024 | £7,119 | £13K | £2,303 | 1 | |
| 31 Dec 2023 | £13K | £23K | £4,031 | 1 | |
| 31 Dec 2022 | £6,184 | £18K | £2,311 | 1 | |
| 31 Dec 2021 | £1,617 | £18K | £2,213 | 1 | |
| 31 Dec 2020 | £9,168 | £31K | £3,940 | 2 | |
| 31 Dec 2019 | £1,768 | £7,223 | £7,275 | 1 | |
| 31 Dec 2018 | £944 | £12K | £11K | ||
| 31 Dec 2017 | £1,395 | £9,961 | £9,247 | ||
| 31 Dec 2016 | -£2,001 | £15K | £11K |
Where TSJ Building Services (Electrical) Ltd is registered
The registered office is in London (NW1), in the Camden local authority area, London. Show NW1 9NB on a map.
Other trade companies in NW1
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- Daniel’S Renovations LtdBuilders
- Al Fattah Cars LimitedMotor traders
- Amna Enterprises LtdMotor traders
- Mo Dynasty (Claygate) LimitedProperty developers
- Borough High Street Development LimitedProperty developers
- Vartia Builders LimitedBuilders
- Wise Men Construction LtdBuilders
Also registered at this address
17 other companies use the same registered office as TSJ Building Services (Electrical) Ltd.
- A Craftsman's Workshop LtdJoiners and carpenters
- Abm Renovation & Design LtdBuilders
- Build and Design LtdFinishing trades
- Crunch Property Investments LtdProperty developers
- Dockland Stone LtdSpecialist contractors
- Erciyes Builders LimitedFinishing trades
- Evenia Automotive LtdMotor traders
- HB Lighting LtdElectricians
- J V London LtdFinishing trades
- Kalo Build LtdProperty developers
- Leoncino Gardens & Landscaping LtdLandscapers and gardeners
- MMP and Sons LimitedProperty developers
- No Dust Are Us LtdCleaning companies
- Pure Crystal Prestige Cleaning LtdCleaning companies
- Regina Renovations LtdProperty developers
- Safe Constructions LtdSpecialist contractors
- V.L.A. Heating & Gas LtdPlumbers and heating engineers
What happens if TSJ Building Services (Electrical) 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 07881517
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 December 2011 (14 years ago)
- Registered office
- 122 ST Pancras Way, London, NW1 9NB
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 28 November 2025
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in London
Other active electrical contractors registered in London.
- TT Building Contractors Limited2008
- TTK Electrical Ltd2018
- Turquoise Tech Limited2025
- TVC Electrical Limited2026
- TWH Property Maintenance Ltd2025
- Twyford Property Management Services Ltd2019
- Tyne Wear Solar Ltd2026
- Tysim Ltd2022
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are TSJ Building Services (Electrical) Ltd's accounts due?
TSJ Building Services (Electrical) Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is TSJ Building Services (Electrical) Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is TSJ Building Services (Electrical) Ltd still trading?
TSJ Building Services (Electrical) 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 TSJ Building Services (Electrical) Ltd do?
TSJ Building Services (Electrical) Ltd is registered under Electrical installation (SIC 43210).
How old is TSJ Building Services (Electrical) Ltd?
TSJ Building Services (Electrical) Ltd was incorporated on 14 December 2011, 14 years ago.
What is the penalty if TSJ Building Services (Electrical) 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 TSJ Building Services (Electrical) 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.