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- Keystone Construction (Scotland) Limited
Keystone Construction (Scotland) Limited
- Company number
- SC608713
- Incorporated
- 20 Sep 20188 years trading
- Registered office
- 24A Ainslie Place, Edinburgh, Lothian, EH3 6AJ
- Nature of business
- Other construction installation
Keystone Construction (Scotland) Limited is a 8-year-old private limited company registered in Edinburgh, company number SC608713, one of 87 installation companies (insulation, lifts, shutters and similar) in Edinburgh. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £34K (+4.4%) on the year before, to £795K.
- Net assets rose in 6 of 6 year-on-year comparisons on record.
- Current assets of £2.9M against £2.3M owed within a year: 1.3 times cover.
- 28 employees on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £795K | £285K | £2.9M | £2.3M | 28 |
| 31 May 2024 | £762K | £230K | £2.7M | £2.3M | 28 |
| 31 May 2023 | £654K | £544K | £2M | £1.5M | 28 |
| 31 May 2022 | £492K | £405K | £1.3M | £765K | 15 |
| 31 May 2021 | £44K | £7,342 | £379K | £309K | 6 |
| 31 May 2020 | £3,688 | £83K | £128K | £80K | 3 |
| 31 May 2019 | -£5,585 | £3,826 | £17K | £27K | 3 |
Who runs and owns Keystone Construction (Scotland) Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| J*** P*** | Director | Sep 2018 |
People with significant control (2)
Public contracts won
Keystone Construction (Scotland) Limited has 2 public sector contract awards on record (2024). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Places for People1 award
- Places for People Group Limited1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Places for People | Places for People Developments – Timber Kits Scotland | Ceiling, not shown | 12 Mar 2024 |
| Places for People Group Limited | Places for People Developments - Groundworks Panel (England & Scotland) | Ceiling, not shown | 12 Mar 2024 |
Where Keystone Construction (Scotland) Limited is registered
The registered office is in Edinburgh (EH3), in the City of Edinburgh local authority area, Scotland. Show EH3 6AJ on a map.
Other trade companies in EH3
- Scandinavian Contractors LtdFloor and wall tilers
- P1 Storage LtdLandscapers and gardeners
- Mansfield Development (Marchhall) LtdProperty developers
- 1ST Adas LtdMechanics and garages
- Oak & Stone Contracts LtdBuilders
- Glenmont Capital LtdProperty developers
- Gould Wilson Investments LimitedProperty developers
- S & I Thomson LimitedMechanics and garages
Also registered at this address
8 other companies use the same registered office as Keystone Construction (Scotland) Limited.
- 1ST Adas LtdMechanics and garages
- 1ST Glass LtdMechanics and garages
- Abstract Substrate LimitedFinishing trades
- Ben Building Services LtdSpecialist contractors
- Jeffrey Stevenson Associates Ltd.Landscapers and gardeners
- Keystone (Scotland) LimitedBuilders
- Seven Hills Property LimitedProperty developers
- Soulscape Property Developments LimitedProperty developers
What happens if Keystone Construction (Scotland) 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- SC608713
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 September 2018 (8 years ago)
- Registered office
- 24A Ainslie Place, Edinburgh, Lothian, EH3 6AJ
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 2 July 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Edinburgh
Other active installation companies (insulation, lifts, shutters and similar) registered in Edinburgh.
- Letcare Property Services Ltd2026
- Lexloc Ltd2020
- Limerich Ltd2014
- Luminos Blind Solutions Ltd2024
- Luxor Services Ltd2024
- Mac & Rao Ltd2024
- Max Brown Joinery & Building Ltd2024
- Maxaim Construction Ltd2022
All installation companies (insulation, lifts, shutters and similar) in Edinburgh · All trades in Edinburgh · Installers across the UK
Frequently asked questions
When are Keystone Construction (Scotland) Limited's accounts due?
Keystone Construction (Scotland) Limited's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Keystone Construction (Scotland) Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Keystone Construction (Scotland) Limited still trading?
Keystone Construction (Scotland) 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 Keystone Construction (Scotland) Limited do?
Keystone Construction (Scotland) Limited is registered under Other construction installation (SIC 43290).
How old is Keystone Construction (Scotland) Limited?
Keystone Construction (Scotland) Limited was incorporated on 20 September 2018, 8 years ago.
Who runs Keystone Construction (Scotland) Limited?
Keystone Construction (Scotland) Limited has 1 active director, the longest-serving appointed in Sep 2018. Their names and service addresses are on the Companies House register.
Who owns Keystone Construction (Scotland) Limited?
2 people or companies have significant control of Keystone Construction (Scotland) Limited: Key Teague Investments Limited (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
Has Keystone Construction (Scotland) Limited won public sector contracts?
Yes. Keystone Construction (Scotland) Limited has 2 contract awards from public bodies on Contracts Finder and Find a Tender, most recently from Places for People.
What is the penalty if Keystone Construction (Scotland) 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 Keystone Construction (Scotland) 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.