- Companies
- Property developers
- Slough
- GSK Building Works Ltd
GSK Building Works Ltd
- Company number
- 12785149
- Incorporated
- 1 Aug 20206 years trading
- Registered office
- 107 Elliman Avenue, Slough, SL2 5BD
- Nature of business
- Development of building projects
GSK Building Works Ltd is a 6-year-old private limited company registered in Slough, company number 12785149, one of 316 property development companies in Slough. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £12K (+53.2%) on the year before, to £33K.
- Net assets rose in 4 of 5 year-on-year comparisons on record.
- Current assets of £36K against £2,714 owed within a year: more than 10 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 6 years, 2021 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2026 | £33K | £5,963 | £36K | £2,714 | 0 |
| 31 Aug 2025 | £22K | £0 | £22K | £0 | 0 |
| 31 Aug 2024 | £11K | £0 | £11K | £0 | 0 |
| 31 Aug 2023 | £1,399 | £0 | £1,399 | £0 | 0 |
| 31 Aug 2022 | £1,399 | £533 | £1,894 | £495 | 0 |
| 31 Aug 2021 | £1,287 | £4,586 | £3,299 | 0 |
Where GSK Building Works Ltd is registered
The registered office is in Slough (SL2), in the Slough local authority area, South East. Show SL2 5BD on a map.
Other trade companies in SL2
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- Sloughcleanings LtdCleaning companies
- Neal LtdBuilders
- J Nomah LtdBuilders
- Eton Motor Group LtdMotor traders
- All Perfect Services LtdBuilders
- Datchet Car Body Shop LtdMechanics and garages
What happens if GSK Building Works 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 12785149
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 August 2020 (6 years ago)
- Registered office
- 107 Elliman Avenue, Slough, SL2 5BD
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 17 October 2025
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 Slough
Other active property development companies registered in Slough.
- H S Construction London Ltd.2016
- Hadeed Constructions Ltd2022
- Hammer Products UK Limited2019
- Hammersmith Ltd2024
- Handy Man & Light Haulage Services Limited2018
- Hansphull Limited2020
- Has Construction & Development Limited2026
- Heathrow Property Services Limited2004
All property development companies in Slough · All trades in Slough · Property developers across the UK
Frequently asked questions
When are GSK Building Works Ltd's accounts due?
GSK Building Works Ltd's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is GSK Building Works Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is GSK Building Works Ltd still trading?
GSK Building Works 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 GSK Building Works Ltd do?
GSK Building Works Ltd is registered under Development of building projects (SIC 41100).
How old is GSK Building Works Ltd?
GSK Building Works Ltd was incorporated on 1 August 2020, 6 years ago.
What is the penalty if GSK Building Works 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 GSK Building Works 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.