- Companies
- Electricians
- London
- Mark Building Maintenance Ltd
Mark Building Maintenance Ltd
- Company number
- 08535771
- Incorporated
- 20 May 201313 years trading
- Registered office
- 10 Garnett Way, London, London, E17 5PE
- Nature of business
- Electrical installation
Mark Building Maintenance Ltd is a 13-year-old private limited company registered in London, company number 08535771, one of 3,448 electrical contractors 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.
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 Mark Building Maintenance LtdOr 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 up £86K (+39%) on the year before, to £305K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £639K against £345K owed within a year: 1.9 times cover.
- 6 employees 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 May 2025 | £305K | £34K | £639K | £345K | 6 |
| 31 May 2024 | £219K | £375K | £61K | 6 | |
| 31 May 2023 | £171K | £209K | £161K | 7 | |
| 31 May 2022 | £95K | £93K | £72K | 5 | |
| 31 May 2021 | £70K | £143K | £139K | 5 | |
| 31 May 2020 | £58K | £177K | £63K | 5 | |
| 31 May 2019 | £10K | £84K | £67K | 4 | |
| 31 May 2018 | £100 | £50K | £50K | ||
| 31 May 2017 | -£29K | £0 | £29K | ||
| 31 May 2016 | £100 | £29K | £41K | £11K |
Where Mark Building Maintenance Ltd is registered
The registered office is in London (E17), in the Waltham Forest local authority area, London. Show E17 5PE on a map.
Other trade companies in E17
- MGB Auto Trading LtdMotor traders
- Spotless Behaviour LtdCleaning companies
- Addison & Vale Construction LtdBuilders
- Karina Business LtdInstallers
- Hazzi Automotive LtdMechanics and garages
- Zlatev Construction Service LimitedFinishing trades
- Zzzguard LtdBuilders
- Ok Estates & Developments LtdBuilders
What happens if Mark Building Maintenance 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 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
- 08535771
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 May 2013 (13 years ago)
- Registered office
- 10 Garnett Way, London, London, E17 5PE
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 30 May 2026
- Previous names
- Mark Oprea Electrical Ltd (until 25 Apr 2017)
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.
- Mark Orbit and Company Limited2008
- Markbench Engineering Services Limited2002
- Marte Tech Limited2021
- Martin & Co Electrical Ltd2016
- Martini Electricals Ltd2023
- Marvel Electrical Limited2014
- Mason Infrastructure Ltd2026
- Master Wire Pros Limited2025
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Mark Building Maintenance Ltd's accounts due?
Mark Building Maintenance Ltd's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is Mark Building Maintenance Ltd'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 Mark Building Maintenance Ltd still trading?
Mark Building Maintenance 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 Mark Building Maintenance Ltd do?
Mark Building Maintenance Ltd is registered under Electrical installation (SIC 43210).
How old is Mark Building Maintenance Ltd?
Mark Building Maintenance Ltd was incorporated on 20 May 2013, 13 years ago.
What is the penalty if Mark Building Maintenance 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 Mark Building Maintenance 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.