- Companies
- Property developers
- Belfast
- Csi1818 Limited
Csi1818 Limited
- Company number
- NI657368
- Incorporated
- 26 Nov 20187 years trading
- Registered office
- GDP House, 159, Durham Street, Belfast, BT12 4GB
- Nature of business
- Development of building projects
Csi1818 Limited is a 7-year-old private limited company registered in Belfast, company number NI657368, one of 402 property development companies in Belfast. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 down £34K (-5.1%) on the year before, to -£707K.
- Net assets rose in 3 of 6 year-on-year comparisons on record.
- Current assets of £691K against £1.4M owed within a year: 0.5 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 |
|---|---|---|---|---|---|
| 30 Nov 2025 | -£707K | £21K | £691K | £1.4M | 0 |
| 30 Nov 2024 | -£673K | £6,022 | £676K | £1.3M | 0 |
| 30 Nov 2023 | £534K | £588K | £1.1M | 1 | |
| 30 Nov 2022 | £488K | £624K | £1.1M | 1 | |
| 30 Nov 2021 | £435K | £517K | 3 | ||
| 30 Nov 2020 | -£374K | £3,617 | £521K | 3 | |
| 30 Nov 2019 | -£279K | £2,013 | £519K | 3 |
Where Csi1818 Limited is registered
The registered office is in Belfast (BT12), in the Belfast local authority area, Northern Ireland. Show BT12 4GB on a map.
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What happens if Csi1818 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 31 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- NI657368
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 November 2018 (7 years ago)
- Registered office
- GDP House, 159, Durham Street, Belfast, BT12 4GB
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 25 November 2025
- Charges (mortgages)
- 7 outstanding of 20 registered
- Previous names
- CS1818 Limited (until 29 Nov 2018)
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 Belfast
Other active property development companies registered in Belfast.
- Cso Contracts Ltd2023
- Cuan Estates Limited2008
- Cully Contracts (N.I.) Limited2018
- Cully Contracts Co Ltd2011
- Custom Construction & Joinery Ltd2021
- D Developments 2 Limited2017
- D Developments 3 Limited2017
- D.A. Wishart Contracts Limited2011
All property development companies in Belfast · All trades in Belfast · Property developers across the UK
Frequently asked questions
When are Csi1818 Limited's accounts due?
Csi1818 Limited's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Csi1818 Limited's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Csi1818 Limited still trading?
Csi1818 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 Csi1818 Limited do?
Csi1818 Limited is registered under Development of building projects (SIC 41100).
How old is Csi1818 Limited?
Csi1818 Limited was incorporated on 26 November 2018, 7 years ago.
What is the penalty if Csi1818 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 Csi1818 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.