- Company number
- 07115671
- Incorporated
- 4 Jan 201016 years trading
- Registered office
- 80-83 Long Lane, London, EC1A 9ET
- Nature of business
- Construction of domestic buildings
Mosaic Construction Ltd is a 16-year-old private limited company registered in London, company number 07115671, one of 12,075 building contractors in London. 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 up £133 (+115.7%) on the year before, to £248.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £38K against £20K owed within a year: 2.0 times cover.
- 1 employee 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 Jan 2025 | £248 | £16K | £38K | £20K | 1 |
| 31 Jan 2024 | £115 | £40K | £52K | £22K | 1 |
| 31 Jan 2023 | £6,816 | £70K | £27K | 1 | |
| 31 Jan 2022 | -£19K | £37K | £13K | 1 | |
| 31 Jan 2021 | -£18K | £36K | £11K | 1 | |
| 31 Jan 2020 | £259 | £12K | £12K | 1 | |
| 31 Jan 2019 | £733 | £23K | £22K | ||
| 31 Jan 2018 | £119 | £16K | £16K | ||
| 31 Jan 2016 | £2,843 | £24K | £25K | £24K | |
| 31 Jan 2015 | £588 | £8,705 | £9,063 | £12K |
Where Mosaic Construction Ltd is registered
The registered office is in London (EC1A), in the City of London local authority area, London. Show EC1A 9ET on a map.
Other trade companies in EC1A
- Simply Crafted Architectural Gems LtdProperty developers
- Nordex Equipment Solutions LtdMachinery repair and installation
- Lewalos LtdMotor traders
- Relations Roofing & Construction LtdRoofers
- The Reboot City LtdRepair services
- Bowline Maintenance Services LimitedFinishing trades
- Beormund Mount Anvil LimitedProperty developers
- Seven Islands Mount Anvil LimitedProperty developers
Also registered at this address
11 other companies use the same registered office as Mosaic Construction Ltd.
- Bankside Garden Services LimitedLandscapers and gardeners
- Daitco LtdProperty developers
- Diamond Hard Property Company LimitedSpecialist contractors
- Eaton Norwich LtdProperty developers
- Pask Construction LimitedBuilders
- Pask Projects LtdBuilders
- Property Realm LtdProperty developers
- Retro-Tech LtdRepair services
- Tide Lettings LtdProperty developers
- UK Performance Cars LtdMotor traders
- Utility Home Services LtdRepair services
What happens if Mosaic Construction 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 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
- 07115671
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 January 2010 (16 years ago)
- Registered office
- 80-83 Long Lane, London, EC1A 9ET
- 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
- 4 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 London
Other active building contractors registered in London.
- Mosarchi Ltd2021
- Moses Propserv Ltd2021
- Moskov Ltd2022
- Moss Barrett Construction Limited1984
- Mossloss Domestics Property Maintenance Ltd2025
- Motif Design and Build Limited2023
- Mottaessex.UK Ltd2022
- Mouli Construction Ltd2025
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Mosaic Construction Ltd's accounts due?
Mosaic Construction Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Mosaic Construction Ltd'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 Mosaic Construction Ltd still trading?
Mosaic Construction 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 Mosaic Construction Ltd do?
Mosaic Construction Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Mosaic Construction Ltd?
Mosaic Construction Ltd was incorporated on 4 January 2010, 16 years ago.
What is the penalty if Mosaic Construction 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 Mosaic Construction 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.