- Companies
- Plasterers
- Swansea
- Black Mountain Construction Services Limited
Black Mountain Construction Services Limited
- Company number
- 16466286
- Incorporated
- 21 May 20251 year trading
- Registered office
- Unit 9 Abernant Cenrte, Pontadawe, Swansea, SA8 4TY
- Nature of business
- Plastering
Black Mountain Construction Services Limited is a 1-year-old private limited company registered in Swansea, company number 16466286, one of 13 plastering companies in Swansea. Its next accounts are due at Companies House on 21 February 2027, and its first CT600 is due at HMRC on 20 May 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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Public contracts won
Black Mountain Construction Services Limited has one public sector contract award on record; the ones with their own published value total £139K (2025). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| City & County of Swansea | Contract for Supply Labour for Plastering Works at Fforesthall | £139K | 28 Nov 2025 |
Where Black Mountain Construction Services Limited is registered
The registered office is in Swansea (SA8), in the Neath Port Talbot local authority area, Wales. Show SA8 4TY on a map.
Other trade companies in SA8
- Pontardawe Hand Car Wash LtdCleaning companies
- BM Carpentry Solutions LimitedJoiners and carpenters
- MS Julian Building Services LimitedProperty developers
- 2MR Property LtdProperty developers
- Davies Groundworks and Construction LtdBuilders
- NJH Car Sales LimitedMotor traders
- The Cleaning Signature LimitedCleaning companies
- Olitill Property Development LtdProperty developers
What happens if Black Mountain Construction Services 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 21 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 22 Feb 2027 to 21 Mar 2027 | £150 |
| 1 to 3 months late | 22 Mar 2027 to 21 May 2027 | £375 |
| 3 to 6 months late | 22 May 2027 to 21 Aug 2027 | £750 |
| More than 6 months late | From 22 Aug 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
- 16466286
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 May 2025 (1 year ago)
- Registered office
- Unit 9 Abernant Cenrte, Pontadawe, Swansea, SA8 4TY
- Nature of business
- Plastering (SIC 43310)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 20 May 2026
Filing notes for plastering companies
Plastering companies are usually small, labour-based businesses. Director pay is often a mix of salary and dividends, which only works if the company has profits to pay dividends from.
Similar companies in Swansea
Other active plastering companies registered in Swansea.
- GW Specialist Render Systems Ltd2024
- Ian Jones Plastering Limited2019
- Inside Out Renders Limited2025
- JTB (Building & Plastering Contractors) Limited2012
- Luke Bidder Plastering Ltd2024
- Marcus Technical Solutions Ltd2019
- MPR Interiors Limited2022
- Paul Bidder Plastering Ltd2007
All plastering companies in Swansea · All trades in Swansea · Plasterers across the UK
Frequently asked questions
When are Black Mountain Construction Services Limited's accounts due?
Black Mountain Construction Services Limited's next accounts are due at Companies House by 21 February 2027 (in 131 days), covering the period to 31 May 2026.
When is Black Mountain Construction Services 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 20 May 2026, due by 20 May 2027, and one for the period to 31 May 2026, due by 31 May 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Black Mountain Construction Services Limited still trading?
Black Mountain Construction Services 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 Construction Services Limited do?
Black Mountain Construction Services Limited is registered under Plastering (SIC 43310).
How old is Black Mountain Construction Services Limited?
Black Mountain Construction Services Limited was incorporated on 21 May 2025, 1 year ago.
Has Black Mountain Construction Services Limited won public sector contracts?
Yes. Black Mountain Construction Services Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £139K), most recently from City & County of Swansea.
What is the penalty if Black Mountain Construction Services 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 Construction Services 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.