- Companies
- Property developers
- London
- Mainprop Limited
Mainprop Limited
- Company number
- 00797112
- Incorporated
- 19 Mar 196462 years trading
- Registered office
- 5 North End Road, Golders Green, London, NW11 7RJ
- Nature of business
- Development of building projects
Mainprop Limited is a 62-year-old private limited company registered in London, company number 00797112, one of 14,100 property development companies in London. Its next accounts are due at Companies House on 29 September 2027, and the CT600 for the period to 29 December 2026 is due at HMRC on 29 December 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 Mainprop 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 £523K (-81.3%) on the year before, to £121K.
- Net assets rose in 7 of 9 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 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £121K | £301K | 0 | ||
| 31 Dec 2024 | £644K | £91K | 0 | ||
| 31 Dec 2023 | £627K | £91K | 0 | ||
| 31 Dec 2022 | £649K | £91K | 0 | ||
| 31 Dec 2021 | £637K | £154K | 1 | ||
| 31 Dec 2020 | £477K | £90K | 0 | ||
| 31 Dec 2019 | £462K | £92K | 0 | ||
| 31 Dec 2018 | £438K | £97K | |||
| 31 Dec 2017 | £420K | £110K | |||
| 31 Dec 2016 | £367K | £116K |
Who runs and owns Mainprop Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| R*** L*** | Director | Apr 2008 |
| R*** L*** | Secretary | before Jan 1993 |
4 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| P*** B*** | Director | Apr 2008 | Oct 2010 |
| M*** F*** | Director | Oct 2010 | Sep 2019 |
| D*** S*** | Director | Feb 1997 | Feb 2014 |
| E*** S*** | Director | Jun 2008 |
Person with significant control
Charges (secured borrowing)
All 7 registered charges have been satisfied. A charge is security a lender takes over a company's assets, typically for a loan, mortgage or asset finance.
| Lender | Status | Registered |
|---|---|---|
| Lloyds Bank PLC | Satisfied Mar 2018 | Jul 2016 |
| Lloyds Bank PLC. | Satisfied Mar 2018 | Mar 2016 |
| A private lender, A private lender | Satisfied Dec 2015 | Aug 1967 |
| A private lender, A private lender | Satisfied Dec 2015 | Jun 1966 |
| A private lender, A private lender | Satisfied Dec 2015 | Oct 1964 |
| A private lender, A private lender | Satisfied Dec 2015 | Jun 1964 |
| A private lender, A private lender | Satisfied Dec 2015 | May 1964 |
Where Mainprop Limited is registered
The registered office is in London (NW11), in the Barnet local authority area, London. Show NW11 7RJ on a map.
Other trade companies in NW11
- Sarahdansky LtdProperty developers
- Estia CCS LtdCleaning companies
- Perez Construction and Decoration LtdBuilders
- Brookstone London LtdBuilders
- Roadsters Choice LtdMotor traders
- Abbeydale Property SPV LtdProperty developers
- KT Roofing Contractors LtdRoofers
- Buildo Contracters LtdFinishing trades
Shared registered office
51 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Mainprop 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 29 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Sep 2027 to 29 Oct 2027 | £150 |
| 1 to 3 months late | 30 Oct 2027 to 29 Dec 2027 | £375 |
| 3 to 6 months late | 30 Dec 2027 to 29 Mar 2028 | £750 |
| More than 6 months late | From 30 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 30 Dec 2027 | £200 |
| 3 months late | 29 Mar 2028 | another £200 |
| 6 months late | 29 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 29 Dec 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
- 00797112
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 March 1964 (62 years ago)
- Registered office
- 5 North End Road, Golders Green, London, NW11 7RJ
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 29 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 9 September 2026
- Charges (mortgages)
- 0 outstanding of 7 registered
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in London
Other active property development companies registered in London.
- Maintain Decor Ltd2015
- Maintx Ltd2025
- Maisk Developments Ltd2025
- Maison Jeune Titles Limited2025
- Maison Jeune Limited2024
- Maison Prestige Limited2026
- Maison Unique Ltd2019
- Maize Ltd2026
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Mainprop Limited's accounts due?
Mainprop Limited's next accounts are due at Companies House by 29 September 2027 (in 350 days), covering the period to 29 December 2026.
When is Mainprop Limited's CT600 due?
The CT600 for the period to 29 December 2026 is due at HMRC by 29 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 30 September 2027.
Is Mainprop Limited still trading?
Mainprop 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 Mainprop Limited do?
Mainprop Limited is registered under Development of building projects (SIC 41100).
How old is Mainprop Limited?
Mainprop Limited was incorporated on 19 March 1964, 62 years ago.
Who runs Mainprop Limited?
Mainprop Limited has 1 active director, the longest-serving appointed in Apr 2008. Their names and service addresses are on the Companies House register.
Who owns Mainprop Limited?
One person or company has significant control of Mainprop Limited: Copaz T&T Consulting Ag (owns 75% or more of the shares).
What is the penalty if Mainprop 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 Mainprop 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.