- Companies
- Specialist contractors
- Llandudno Junction
- Sustainable Warmth Limited
Sustainable Warmth Limited
- Company number
- 14617638
- Incorporated
- 26 Jan 20233 years trading
- Registered office
- Anson House, 1 Cae'r Llynen, Llandudno Junction, Conwy, LL31 9LS
- Nature of business
- Other specialised construction activities n.e.c.
Sustainable Warmth Limited is a 3-year-old private limited company registered in Llandudno Junction, company number 14617638, one of 5 specialist construction companies in Llandudno Junction. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £432K (+894.4%) on the year before, to £480K.
- Current assets of £799K against £323K owed within a year: 2.5 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £480K | £295K | £799K | £323K | 2 |
| 31 Jan 2024 | £48K | £136K | £248K | £204K | 1 |
Where Sustainable Warmth Limited is registered
The registered office is in Llandudno Junction (LL31), in the Conwy local authority area, Wales. Show LL31 9LS on a map.
Other trade companies in LL31
- CCM Paving LtdSpecialist contractors
- Itech LtdElectricians
- K O Wind LtdElectricians
- R.Jones Roofing LtdRoofers
- Paragon Consult LtdSpecialist contractors
- Colwyn Construction LtdBuilders
- Evansrenewables LtdProperty developers
- Northwest Solar and Roofing LtdRoofers
Also registered at this address
9 other companies use the same registered office as Sustainable Warmth Limited.
- Beau Bridge Development LimitedJoiners and carpenters
- Beech Developments (Chwilog) LtdProperty developers
- Beech Developments (NW) LimitedProperty developers
- D & J Jarvis LimitedFinishing trades
- DP Consulting (NW) LimitedMechanics and garages
- Glanwest LtdCivil engineering
- JSJ Joinery LimitedJoiners and carpenters
- MJS Building Systems (NW) LtdInstallers
- North Wales Plastics LtdRoofers
What happens if Sustainable Warmth 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 14617638
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 January 2023 (3 years ago)
- Registered office
- Anson House, 1 Cae'r Llynen, Llandudno Junction, Conwy, LL31 9LS
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 28 November 2025
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Llandudno Junction
Other active specialist construction companies registered in Llandudno Junction.
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Frequently asked questions
When are Sustainable Warmth Limited's accounts due?
Sustainable Warmth Limited's next accounts are due at Companies House by 31 October 2026 (in 17 days), covering the period to 31 January 2026.
When is Sustainable Warmth Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Sustainable Warmth Limited still trading?
Sustainable Warmth 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 Sustainable Warmth Limited do?
Sustainable Warmth Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Sustainable Warmth Limited?
Sustainable Warmth Limited was incorporated on 26 January 2023, 3 years ago.
What is the penalty if Sustainable Warmth 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 Sustainable Warmth 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.