- Companies
- Specialist contractors
- London
- Gemstone Construction Ltd
Gemstone Construction Ltd
- Company number
- 12885517
- Incorporated
- 17 Sep 20206 years trading
- Registered office
- First Floor, 359 High Street, Stratford, London, E15 4QZ
- Nature of business
- Other specialised construction activities n.e.c.
Gemstone Construction Ltd is a 6-year-old private limited company registered in London, company number 12885517, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £4,209 (+6.5%) on the year before, to £69K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £76K against £6,758 owed within a year: more than 10 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £69K | £76K | £6,758 | 2 | |
| 30 Sep 2024 | £65K | £74K | £9,153 | 2 | |
| 30 Sep 2023 | £68K | £83K | £15K | 2 | |
| 30 Sep 2022 | £48K | £4,482 | £64K | £16K | 2 |
| 30 Sep 2021 | £33K | £54K | £21K | 2 |
Who runs and owns Gemstone Construction Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| M*** I*** | Director | Sep 2020 |
Person with significant control
Where Gemstone Construction Ltd is registered
The registered office is in London (E15), in the Newham local authority area, London. Show E15 4QZ on a map.
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Also registered at this address
17 other companies use the same registered office as Gemstone Construction Ltd.
- A. Lukosius LtdFinishing trades
- Adhurim Civil Engineering LimitedCivil engineering
- Ak Cabling LtdInstallers
- Artalee LtdSpecialist contractors
- Balaisis LtdFinishing trades
- Decoro Joinery LtdJoiners and carpenters
- E.J.Labour Services LimitedGroundworks and demolition
- Erwis Construction LtdBuilders
- Gin & Co Installation LtdInstallers
- GL Carpentry LtdBuilders
- Ig & Son Carpentry LtdJoiners and carpenters
- KBB Projects LtdFinishing trades
- Lorsan LtdJoiners and carpenters
- Majestic Installations LtdInstallers
- Nick Recovery LtdMechanics and garages
- Rol Carpentry LtdInstallers
- Tectum Construction LtdBuilders
What happens if Gemstone 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 12885517
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 September 2020 (6 years ago)
- Registered office
- First Floor, 359 High Street, Stratford, London, E15 4QZ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 16 September 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- Generate Construction Ltd2017
- Genev Solutions Ltd2020
- Genius Money Holdings Limited2019
- Geno 78 Ltd2022
- Geo Gas Services London Limited2014
- Geo Style Pro Max Ltd2025
- Geo Victor Construction Management Ltd2015
- Geoboson Engineering Ltd2018
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Frequently asked questions
When are Gemstone Construction Ltd's accounts due?
Gemstone Construction Ltd's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Gemstone Construction Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Gemstone Construction Ltd still trading?
Gemstone 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 Gemstone Construction Ltd do?
Gemstone Construction Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Gemstone Construction Ltd?
Gemstone Construction Ltd was incorporated on 17 September 2020, 6 years ago.
Who runs Gemstone Construction Ltd?
Gemstone Construction Ltd has 1 active director, the longest-serving appointed in Sep 2020. Their names and service addresses are on the Companies House register.
Who owns Gemstone Construction Ltd?
One person or company has significant control of Gemstone Construction Ltd: an individual (has significant influence or control).
What is the penalty if Gemstone 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 Gemstone 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.