- Companies
- Property developers
- Belfast
- Black Mountain Developers Limited
Black Mountain Developers Limited
- Company number
- NI734059
- Incorporated
- 3 Oct 20251 year trading
- Registered office
- 9 Upper Dunmurry Lane, Dunmurry, Belfast, BT17 0AA
- Nature of business
- Development of building projects
Black Mountain Developers Limited is a 1-year-old private limited company registered in Belfast, company number NI734059, one of 402 property development companies in Belfast. Its next accounts are due at Companies House on 3 July 2027, and its first CT600 is due at HMRC on 2 October 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Black Mountain Developers Limited is registered
The registered office is in Belfast (BT17), in the Belfast local authority area, Northern Ireland. Show BT17 0AA on a map.
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Also registered at this address
4 other companies use the same registered office as Black Mountain Developers Limited.
- Assist Fleet Solutions LtdMechanics and garages
- Gardenhill Properties LimitedProperty developers
- Jemy Developments LtdProperty developers
- Kennetix Electrical Services LtdElectricians
What happens if Black Mountain Developers 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 3 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 4 Jul 2027 to 3 Aug 2027 | £150 |
| 1 to 3 months late | 4 Aug 2027 to 3 Oct 2027 | £375 |
| 3 to 6 months late | 4 Oct 2027 to 3 Jan 2028 | £750 |
| More than 6 months late | From 4 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- NI734059
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 October 2025 (1 year ago)
- Registered office
- 9 Upper Dunmurry Lane, Dunmurry, Belfast, BT17 0AA
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 October (accounting reference date)
- Accounts type
- No accounts filed yet
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.
- Bluestone Maintenance Limited2016
- Bonza Ltd2015
- Botanic Development Company Ltd2017
- Boucher Construction & Shopfitting Limited2025
- Bric Contracts Limited2017
- Brigstock Campsite Limited2017
- Brook Factory Ban Ltd2025
- Brookland Property Ltd2017
All property development companies in Belfast · All trades in Belfast · Property developers across the UK
Frequently asked questions
When are Black Mountain Developers Limited's accounts due?
Black Mountain Developers Limited's next accounts are due at Companies House by 3 July 2027 (in 264 days), covering the period to 31 October 2026.
When is Black Mountain Developers 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 2 October 2026, due by 2 October 2027, and one for the period to 31 October 2026, due by 31 October 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Black Mountain Developers Limited still trading?
Black Mountain Developers 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 Black Mountain Developers Limited do?
Black Mountain Developers Limited is registered under Development of building projects (SIC 41100).
How old is Black Mountain Developers Limited?
Black Mountain Developers Limited was incorporated on 3 October 2025, 1 year ago.
What is the penalty if Black Mountain Developers 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 Black Mountain Developers 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.