- Companies
- Installers
- Blackburn
- SW & Sons Dampproofing Ltd
SW & Sons Dampproofing Ltd
- Company number
- 17045232
- Incorporated
- 20 Feb 2026
- Registered office
- 16 ST. Charles Road, Rishton, Blackburn, Lancs, BB1 4HR
- Nature of business
- Other construction installation
SW & Sons Dampproofing Ltd is a newly incorporated private limited company registered in Blackburn, company number 17045232, one of 45 installation companies (insulation, lifts, shutters and similar) in Blackburn. Its next accounts are due at Companies House on 20 November 2027, and its first CT600 is due at HMRC on 19 February 2028.
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 SW & Sons Dampproofing Ltd is registered
The registered office is in Blackburn (BB1), in the Hyndburn local authority area, North West. Show BB1 4HR on a map.
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What happens if SW & Sons Dampproofing Ltd 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 20 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 21 Nov 2027 to 20 Dec 2027 | £150 |
| 1 to 3 months late | 21 Dec 2027 to 20 Feb 2028 | £375 |
| 3 to 6 months late | 21 Feb 2028 to 20 May 2028 | £750 |
| More than 6 months late | From 21 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 2029 | 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
- 17045232
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 February 2026
- Registered office
- 16 ST. Charles Road, Rishton, Blackburn, Lancs, BB1 4HR
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 28 February (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Blackburn
Other active installation companies (insulation, lifts, shutters and similar) registered in Blackburn.
- TF Joinery & Construction Ltd2019
- Tunstall Bros Limited2020
- UK Stove Installers West Midlands Limited2025
- Valley Construction Limited2011
- Vision-On Roofing Services Limited2021
- 24 Hour Construction Services Limited2017
- A Jones & Sons Limited2023
- A.S.K. Joinery Ltd2016
All installation companies (insulation, lifts, shutters and similar) in Blackburn · All trades in Blackburn · Installers across the UK
Frequently asked questions
When are SW & Sons Dampproofing Ltd's accounts due?
SW & Sons Dampproofing Ltd's next accounts are due at Companies House by 20 November 2027 (in 403 days), covering the period to 28 February 2027.
When is SW & Sons Dampproofing Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 19 February 2027, due by 19 February 2028, and one for the period to 28 February 2027, due by 28 February 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is SW & Sons Dampproofing Ltd still trading?
SW & Sons Dampproofing Ltd 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 SW & Sons Dampproofing Ltd do?
SW & Sons Dampproofing Ltd is registered under Other construction installation (SIC 43290).
How old is SW & Sons Dampproofing Ltd?
SW & Sons Dampproofing Ltd was incorporated on 20 February 2026, less than a year ago.
What is the penalty if SW & Sons Dampproofing Ltd 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 SW & Sons Dampproofing Ltd 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.