- Companies
- Builders
- Bexleyheath
- Sej Construction Ltd
Sej Construction Ltd
- Company number
- 15824158
- Incorporated
- 8 Jul 20242 years trading
- Registered office
- 301 Long Lane, Bexleyheath, DA7 5JD
- Nature of business
- Construction of domestic buildings
Sej Construction Ltd is a 2-year-old private limited company registered in Bexleyheath, company number 15824158, one of 98 building contractors in Bexleyheath. 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
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 £30K (+444.5%) on the year before, to £36K.
- Current assets of £40K against £9,011 owed within a year: 4.4 times cover.
- 2 employees on average, down from 3 the year before.
- Balance sheets on record for 2 years, 2025 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £36K | £152 | £40K | £9,011 | 2 |
| 31 Jul 2025 | £6,692 | £6,692 | 3 |
Where Sej Construction Ltd is registered
The registered office is in Bexleyheath (DA7), in the Bexley local authority area, London. Show DA7 5JD on a map.
Other trade companies in DA7
- Heyplumber LtdPlumbers and heating engineers
- Volt&Valve LtdMachinery repair and installation
- Odessa Services LtdCleaning companies
- TK Lifts LimitedBuilders
- Tommy Wells LimitedScaffolders
- Thumwood’S Build LtdFinishing trades
- A&E Elite Groundworks LtdBuilders
- Noonan Civil Engineering LtdCivil engineering
What happens if Sej Construction 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 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
- 15824158
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 July 2024 (2 years ago)
- Registered office
- 301 Long Lane, Bexleyheath, DA7 5JD
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 7 July 2026
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 Bexleyheath
Other active building contractors registered in Bexleyheath.
- Selena Gas Domestic Services Ltd2015
- Shergill Plastering Ltd2025
- Sigma Contracting Ltd2016
- Sina Contractors Ltd2020
- Singh Homes Limited2020
- SJW Brickwork Limited2021
- South East Home Improvements Ltd2025
- Spaceup Build Ltd2026
All building contractors in Bexleyheath · All trades in Bexleyheath · Builders across the UK
Frequently asked questions
When are Sej Construction Ltd's accounts due?
Sej Construction Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Sej Construction Ltd'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 Sej Construction Ltd still trading?
Sej Construction 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 Sej Construction Ltd do?
Sej Construction Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Sej Construction Ltd?
Sej Construction Ltd was incorporated on 8 July 2024, 2 years ago.
What is the penalty if Sej Construction 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 Sej Construction 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.