- Companies
- Builders
- South Croydon
- MM Loft Conversion& Extensions Ltd
MM Loft Conversion& Extensions Ltd
- Company number
- 12246911
- Incorporated
- 7 Oct 20197 years trading
- Registered office
- 109 Brian Avenue, South Croydon, CR2 9NJ
- Nature of business
- Construction of domestic buildings
MM Loft Conversion& Extensions Ltd is a 7-year-old private limited company registered in South Croydon, company number 12246911, one of 100 building contractors in South Croydon. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 down £31K (-34.4%) on the year before, to -£121K.
- Net assets rose in 2 of 5 year-on-year comparisons on record.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | -£121K | £17K | £0 | 0 | |
| 31 Oct 2024 | -£90K | £705 | £4,618 | 0 | |
| 31 Oct 2023 | -£41K | £259 | 0 | ||
| 31 Oct 2022 | -£49K | £11K | 0 | ||
| 31 Oct 2021 | -£57K | £1,238 | £0 | 0 | |
| 31 Oct 2020 | -£20K | £27K | £596 | 2 |
Who runs and owns MM Loft Conversion& Extensions Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| M*** A*** | Director | Oct 2019 |
Person with significant control
Where MM Loft Conversion& Extensions Ltd is registered
The registered office is in South Croydon (CR2), in the Croydon local authority area, London. Show CR2 9NJ on a map.
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- Ottorigo LimitedInstallers
- DRJ Electricals-Gas LtdElectricians
- The New Drivers Shop LtdMotor traders
- Knoxford Plumbing & Heating LtdPlumbers and heating engineers
- Frontline Design & Build LtdBuilders
- Vellarowheels LtdMotor traders
- Lady Ace Cleaning Co LimitedCleaning companies
Also registered at this address
3 other companies use the same registered office as MM Loft Conversion& Extensions Ltd.
- MS Building Group LtdBuilders
- MS Loft Conversion LtdBuilders
- MS Planning & Design LtdBuilders
What happens if MM Loft Conversion& Extensions 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 12246911
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 October 2019 (7 years ago)
- Registered office
- 109 Brian Avenue, South Croydon, CR2 9NJ
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 6 October 2025
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 South Croydon
Other active building contractors registered in South Croydon.
- O&E Construction Ltd2022
- Ofl Brickwork Limited2022
- Onaca Building Services Limited2008
- P A Henery Ltd2017
- Patron Electrical Ltd2019
- Perfect Interiors Ltd2022
- Prestige Properties Care Ltd2020
- Primex Construction Ltd2026
All building contractors in South Croydon · All trades in South Croydon · Builders across the UK
Frequently asked questions
When are MM Loft Conversion& Extensions Ltd's accounts due?
MM Loft Conversion& Extensions Ltd's next accounts are due at Companies House by 31 July 2027 (in 292 days), covering the period to 31 October 2026.
When is MM Loft Conversion& Extensions Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is MM Loft Conversion& Extensions Ltd still trading?
MM Loft Conversion& Extensions 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 MM Loft Conversion& Extensions Ltd do?
MM Loft Conversion& Extensions Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is MM Loft Conversion& Extensions Ltd?
MM Loft Conversion& Extensions Ltd was incorporated on 7 October 2019, 7 years ago.
Who runs MM Loft Conversion& Extensions Ltd?
MM Loft Conversion& Extensions Ltd has 1 active director, the longest-serving appointed in Oct 2019. Their names and service addresses are on the Companies House register.
Who owns MM Loft Conversion& Extensions Ltd?
One person or company has significant control of MM Loft Conversion& Extensions Ltd: an individual (owns 75% or more of the shares).
What is the penalty if MM Loft Conversion& Extensions 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 MM Loft Conversion& Extensions 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.