- Companies
- Joiners and carpenters
- Super Seal Windows Limited
Super Seal Windows Limited
- Company number
- NI045702
- Incorporated
- 6 Mar 200323 years trading
- Registered office
- Unit 3 Moyola Industrial Estate, Moyola Road, Castledawson, Co Londonderry, BT45 8HN
- Nature of business
- Joinery installation; Glazing
Super Seal Windows Limited is a 23-year-old private limited company registered in Castledawson, company number NI045702, one of the UK's joinery companies. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Super Seal Windows LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £50K (-137.3%) on the year before, to -£87K.
- Net assets rose in 0 of 4 year-on-year comparisons on record.
- Current assets of £5,818 against £470K owed within a year: 0.0 times cover.
- 1 employee on average, down from 4 the year before.
- Balance sheets on record for 5 years, 2014 to 2018.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2018 | -£87K | £43 | £5,818 | £470K | 1 |
| 31 Mar 2017 | -£37K | £128 | £49K | £467K | 4 |
| 31 Mar 2016 | £28K | £0 | £178K | £498K | |
| 31 Mar 2015 | £38K | £17K | £122K | £401K | |
| 31 Mar 2014 | £59K | £45K | £224K | £454K |
Where Super Seal Windows Limited is registered
The registered office is in Castledawson (BT45), in the Mid Ulster local authority area, Northern Ireland. Show BT45 8HN on a map.
Other trade companies in BT45
- Oakleaf Modular Solutions LimitedSpecialist contractors
- Decorfinishni LtdPainters and decorators
- Tonagh Construction Services LtdSpecialist contractors
- Es Brickwork LtdSpecialist contractors
- CSS Ireland LtdSpecialist contractors
- 825 Contracts LtdBuilders
- Vind Services LtdMachinery repair and installation
- Braidwater (Strategic Land) LimitedProperty developers
What happens if Super Seal Windows 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- NI045702
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 March 2003 (23 years ago)
- Registered office
- Unit 3 Moyola Industrial Estate, Moyola Road, Castledawson, Co Londonderry, BT45 8HN
- Nature of business
- Joinery installation (SIC 43320)
Glazing (SIC 43342) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 6 March 2026
- Charges (mortgages)
- 2 outstanding of 3 registered
- Previous names
- Anlor Home Solutions Ltd (until 26 Jun 2015)
Superseal Windows Limited (until 28 Sep 2012)
Filing notes for joinery companies
Joinery companies can carry stock and work in progress at the year end, especially bespoke workshop work, and that figure moves the profit for the year.
Similar companies
Other active joinery companies.
Frequently asked questions
When are Super Seal Windows Limited's accounts due?
Super Seal Windows Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Super Seal Windows Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Super Seal Windows Limited still trading?
Super Seal Windows 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 Super Seal Windows Limited do?
Super Seal Windows Limited is registered under Joinery installation (SIC 43320); Glazing (SIC 43342).
How old is Super Seal Windows Limited?
Super Seal Windows Limited was incorporated on 6 March 2003, 23 years ago.
What is the penalty if Super Seal Windows 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 Super Seal Windows 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.