- Companies
- Machinery repair and installation
- Edgware
- Sef Engineering Limited
Sef Engineering Limited
- Company number
- 06641164
- Incorporated
- 8 Jul 200818 years trading
- Registered office
- 2 Langley Crescent, Edgware, HA8 9SZ
- Nature of business
- Repair of electrical equipment
Sef Engineering Limited is a 18-year-old private limited company registered in Edgware, company number 06641164, one of 25 machinery repair and installation companies in Edgware. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Sef Engineering LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 down £6,707 (-27.3%) on the year before, to -£31K.
- Net assets rose in 2 of 8 year-on-year comparisons on record.
- Current assets of £4,179 against £15K owed within a year: 0.3 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | -£31K | £3,197 | £4,179 | £15K | 1 |
| 31 Mar 2024 | -£25K | £24K | £26K | £22K | 1 |
| 31 Mar 2023 | -£27K | £22K | £23K | £22K | 1 |
| 31 Mar 2022 | -£13K | £35K | £28K | £7,213 | 1 |
| 31 Mar 2021 | £231 | £35K | £45K | £7,105 | 1 |
| 31 Mar 2020 | £292 | £9,613 | £9,837 | £9,804 | 1 |
| 31 Mar 2019 | £9,130 | £7,426 | £18K | £9,054 | |
| 31 Mar 2018 | £7,097 | £8,156 | £14K | £7,157 | |
| 31 Mar 2017 | £7,982 | £18K | £20K | £13K |
Where Sef Engineering Limited is registered
The registered office is in Edgware (HA8), in the Barnet local authority area, London. Show HA8 9SZ on a map.
Other trade companies in HA8
- Capital Roadside & Motors LtdMotor traders
- Shreeji Decor LtdInstallers
- Kohli Group Properties LimitedProperty developers
- Brothers Landmark LtdProperty developers
- MS Flooring & Decor LtdFloor and wall tilers
- C&I Building Solutions LtdBuilders
- Dynamic Mobile Tyre LtdMechanics and garages
- Crownline Motors LtdMotor traders
Also registered at this address
9 other companies use the same registered office as Sef Engineering Limited.
- DJF Construction Management LimitedBuilders
- Eco Village Industries LtdSpecialist contractors
- KD Commercial Cleaning Co LtdCleaning companies
- MM Heating & Bathrooms LtdPlumbers and heating engineers
- R.J. Auto (London) LimitedMechanics and garages
- The00Company LtdFinishing trades
- Total Estate Maintenance LtdFinishing trades
- Voitel LtdCivil engineering
- WS Property Holdings LtdBuilders
What happens if Sef Engineering 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 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 06641164
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 July 2008 (18 years ago)
- Registered office
- 2 Langley Crescent, Edgware, HA8 9SZ
- Nature of business
- Repair of electrical equipment (SIC 33140)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 2 January 2026
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in Edgware
Other active machinery repair and installation companies registered in Edgware.
- Smart Energy Plus Limited2021
- Stanway Tyres Limited2021
- Technovax Group Ltd2026
- Vin Chira Ltd2023
- W/Indi Logistics Ltd2024
- Window Tinting Ltd2026
- WMR Refrigeration Ltd2026
- A H Airconditioning Ltd2008
All machinery repair and installation companies in Edgware · All trades in Edgware · Machinery repair and installation across the UK
Frequently asked questions
When are Sef Engineering Limited's accounts due?
Sef Engineering Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Sef Engineering Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Sef Engineering Limited still trading?
Sef Engineering 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 Sef Engineering Limited do?
Sef Engineering Limited is registered under Repair of electrical equipment (SIC 33140).
How old is Sef Engineering Limited?
Sef Engineering Limited was incorporated on 8 July 2008, 18 years ago.
What is the penalty if Sef Engineering 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 Sef Engineering 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.