- Companies
- Property developers
- Londonderry
- Keystone Investments (N.I) Limited
Keystone Investments (N.I) Limited
- Company number
- NI641960
- Incorporated
- 4 Nov 20169 years trading
- Registered office
- Unit 8, Elagh Business Park, Buncrana Road, Londonderry, BT48 8QH
- Nature of business
- Development of building projects; Construction of other civil engineering projects n.e.c.; Renting and leasing of construction and civil engineering machinery and equipment
Keystone Investments (N.I) Limited is a 9-year-old private limited company registered in Londonderry, company number NI641960, one of 79 property development companies in Londonderry. Its next accounts are due at Companies House on 27 November 2026, and its first CT600 is due at HMRC on 27 November 2026.
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 £62K (+34.5%) on the year before, to £242K.
- Net assets rose in 4 of 7 year-on-year comparisons on record.
- Current assets of £122K against £59K owed within a year: 2.1 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 8 years, 2017 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 27 Nov 2024 | £242K | £122K | £59K | 1 | |
| 30 Nov 2023 | £180K | £139K | £54K | 1 | |
| 30 Nov 2022 | £99K | £148K | £118K | 1 | |
| 30 Nov 2021 | £15K | £83K | £32K | 0 | |
| 30 Nov 2020 | £2 | £2 | 0 | ||
| 30 Nov 2019 | £2 | £2 | 1 | ||
| 30 Nov 2018 | £2 | £2 | |||
| 30 Nov 2017 | £2 | £2 |
Where Keystone Investments (N.I) Limited is registered
The registered office is in Londonderry (BT48), in the Derry City and Strabane local authority area, Northern Ireland. Show BT48 8QH on a map.
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What happens if Keystone Investments (N.I) 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 27 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Nov 2026 to 27 Dec 2026 | £150 |
| 1 to 3 months late | 28 Dec 2026 to 27 Feb 2027 | £375 |
| 3 to 6 months late | 28 Feb 2027 to 27 May 2027 | £750 |
| More than 6 months late | From 28 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 28 Feb 2027 | £200 |
| 3 months late | 27 May 2027 | another £200 |
| 6 months late | 27 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 27 Feb 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
- NI641960
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 November 2016 (9 years ago)
- Registered office
- Unit 8, Elagh Business Park, Buncrana Road, Londonderry, BT48 8QH
- Nature of business
- Development of building projects (SIC 41100)
Construction of other civil engineering projects n.e.c. (SIC 42990)
Renting and leasing of construction and civil engineering machinery and equipment (SIC 77320) - Year end
- 27 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 27 November 2024
- Last confirmation statement
- 3 November 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 Londonderry
Other active property development companies registered in Londonderry.
- Lagavara Limited2011
- Lynwood Homes Limited1981
- Magheraboy Developments Limited2010
- Maiden City Investments Limited2015
- Malone B3 Property Limited2014
- MC Facilities Management Limited2023
- MCD Construction Management Limited2014
- McGinnis Developments Limited2010
All property development companies in Londonderry · All trades in Londonderry · Property developers across the UK
Frequently asked questions
When are Keystone Investments (N.I) Limited's accounts due?
Keystone Investments (N.I) Limited's next accounts are due at Companies House by 27 November 2026 (in 45 days), covering the period to 27 February 2026.
When is Keystone Investments (N.I) Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 27 November 2025, due by 27 November 2026, and one for the period to 27 February 2026, due by 27 February 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Keystone Investments (N.I) Limited still trading?
Keystone Investments (N.I) 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 Investments (N.I) Limited do?
Keystone Investments (N.I) Limited is registered under Development of building projects (SIC 41100); Construction of other civil engineering projects n.e.c. (SIC 42990); Renting and leasing of construction and civil engineering machinery and equipment (SIC 77320).
How old is Keystone Investments (N.I) Limited?
Keystone Investments (N.I) Limited was incorporated on 4 November 2016, 9 years ago.
What is the penalty if Keystone Investments (N.I) 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 Investments (N.I) 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.