- Company number
- 09951011
- Incorporated
- 14 Jan 201610 years trading
- Registered office
- Mulgrave Chambers Ground Floor, Unit 1, 26-28 Mulgrave Road, Sutton, Surrey, SM2 6LE
- Nature of business
- Construction of domestic buildings
Mason Projects London Limited is a 10-year-old private limited company registered in Sutton, company number 09951011, one of 236 building contractors in Sutton. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £7,575 (-48.8%) on the year before, to -£23K.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- Current assets of £8,905 against £21K owed within a year: 0.4 times cover.
- 3 employees on average, down from 4 the year before.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | -£23K | £8,905 | £8,905 | £21K | 3 |
| 31 Jan 2024 | -£16K | £42K | £42K | £46K | 4 |
| 31 Jan 2023 | -£48K | £14K | £14K | £48K | 4 |
| 31 Jan 2022 | -£55K | £26K | £26K | £61K | 4 |
Where Mason Projects London Limited is registered
The registered office is in Sutton (SM2), in the Sutton local authority area, London. Show SM2 6LE on a map.
Other trade companies in SM2
- Stent Projects London LtdBuilders
- Ry Rigging Services LtdInstallers
- JP Plumbing, Heating & Drainage Solutions LtdPlumbers and heating engineers
- MR & Sons Roofing & Building LtdBuilders
- Velora Facilities LimitedCleaning companies
- Sparkle Shark LtdCleaning companies
- GL Building Solutions LtdBuilders
- Bespoke Air Design and Installation LimitedPlumbers and heating engineers
Also registered at this address
4 other companies use the same registered office as Mason Projects London Limited.
- Bright Plumbing & Heating Services LimitedPlumbers and heating engineers
- Narccorn LimitedProperty developers
- Quay Construction LimitedFinishing trades
- Up Above Group LimitedScaffolders
What happens if Mason Projects London 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 09951011
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 January 2016 (10 years ago)
- Registered office
- Mulgrave Chambers Ground Floor, Unit 1, 26-28 Mulgrave Road, Sutton, Surrey, SM2 6LE
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 13 January 2026
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 Sutton
Other active building contractors registered in Sutton.
- Mat Drylining Ltd2016
- Matteo Contractors Ltd2018
- Merchant & Associates Limited2018
- MGT Construction Limited2007
- MKV Builders Ltd2017
- Modify Building Services Ltd2024
- Monsterkil Construction Ltd2025
- Montini Limited2026
All building contractors in Sutton · All trades in Sutton · Builders across the UK
Frequently asked questions
When are Mason Projects London Limited's accounts due?
Mason Projects London Limited's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Mason Projects London Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Mason Projects London Limited still trading?
Mason Projects London 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 Mason Projects London Limited do?
Mason Projects London Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Mason Projects London Limited?
Mason Projects London Limited was incorporated on 14 January 2016, 10 years ago.
What is the penalty if Mason Projects London 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 Mason Projects London 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.