- Companies
- Electricians
- Upminster
- Mounthill Engineers Limited
Mounthill Engineers Limited
- Company number
- 03575114
- Incorporated
- 4 Jun 199828 years trading
- Registered office
- 56 Melstock Avenue, Upminster, Essex, RM14 3UL
- Nature of business
- Electrical installation
Mounthill Engineers Limited is a 28-year-old private limited company registered in Upminster, company number 03575114, one of 42 electrical contractors in Upminster. 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 Mounthill Engineers 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 £31K (-4.5%) on the year before, to £666K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £640K against £27K owed within a year: more than 10 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 10 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £666K | £328K | £640K | £27K | 4 |
| 31 Mar 2024 | £697K | £155K | £677K | £44K | 4 |
| 31 Mar 2023 | £654K | £437K | £809K | £155K | 4 |
| 31 Mar 2022 | £549K | £120K | £658K | £109K | 4 |
| 31 Mar 2021 | £408K | £253K | £588K | £180K | 2 |
| 30 Sep 2019 | £553K | £309K | £713K | £161K | |
| 30 Sep 2018 | £415K | £307K | £519K | £104K | |
| 30 Sep 2017 | £388K | £329K | £531K | £143K | |
| 30 Sep 2016 | £325K | £216K | £417K | £93K | |
| 30 Sep 2015 | £313K | £125K | £410K | £98K |
Where Mounthill Engineers Limited is registered
The registered office is in Upminster (RM14), in the Havering local authority area, London. Show RM14 3UL on a map.
Other trade companies in RM14
- Bobofresh LtdCleaning companies
- HTS Construction LtdBuilders
- We Fix Energy LtdCivil engineering
- ZH Services LtdBuilders
- Ragasan LimitedBuilders
- Your Serve LtdCleaning companies
- LC Engineering LtdMachinery repair and installation
- Caat Interiors LtdInstallers
What happens if Mounthill Engineers 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
- 03575114
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 June 1998 (28 years ago)
- Registered office
- 56 Melstock Avenue, Upminster, Essex, RM14 3UL
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 13 June 2026
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 Upminster
Other active electrical contractors registered in Upminster.
- Nomico Electrical Company Limited1973
- Plumel Ltd2018
- PV Electrical Services Limited2018
- Reed Electrical Services Limited2005
- Rna Electrical Ltd2025
- RS Control Solutions Limited2018
- RWT Electrical Limited2003
- S.B National Electrical Contractors Limited2016
All electrical contractors in Upminster · All trades in Upminster · Electricians across the UK
Frequently asked questions
When are Mounthill Engineers Limited's accounts due?
Mounthill Engineers 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 Mounthill Engineers 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 Mounthill Engineers Limited still trading?
Mounthill Engineers 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 Mounthill Engineers Limited do?
Mounthill Engineers Limited is registered under Electrical installation (SIC 43210).
How old is Mounthill Engineers Limited?
Mounthill Engineers Limited was incorporated on 4 June 1998, 28 years ago.
What is the penalty if Mounthill Engineers 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 Mounthill Engineers 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.