- Companies
- Installers
- St Austell
- Cornwall Damp-Proofing Ltd
Cornwall Damp-Proofing Ltd
- Company number
- 09573062
- Incorporated
- 5 May 201511 years trading
- Registered office
- ST Denys House, 22 East Hill, St Austell, Cornwall, PL25 4TR
- Nature of business
- Other construction installation
Cornwall Damp-Proofing Ltd is a 11-year-old private limited company registered in St Austell, company number 09573062, one of 9 installation companies (insulation, lifts, shutters and similar) in St Austell. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £38K (+181.3%) on the year before, to £59K.
- Net assets rose in 6 of 8 year-on-year comparisons on record.
- Current assets of £55K against £18K owed within a year: 3.0 times cover.
- 1 employee on average, down from 2 the year before.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £59K | £55K | £18K | 1 | |
| 31 May 2024 | £21K | £14K | £13K | 2 | |
| 31 May 2023 | £53K | £34K | £2,355 | 1 | |
| 31 May 2022 | £44K | £36K | £2,517 | 1 | |
| 31 May 2021 | £41K | £38K | £7,344 | 1 | |
| 31 May 2020 | £19K | £17K | £7,823 | 1 | |
| 31 May 2019 | £10K | £3,954 | £4,195 | ||
| 31 May 2018 | £26K | £18K | £1,855 | 1 | |
| 31 May 2017 | £21K | £42K | £30K | 1 |
Where Cornwall Damp-Proofing Ltd is registered
The registered office is in St Austell (PL25), in the Cornwall local authority area, South West. Show PL25 4TR on a map.
Other trade companies in PL25
- Platinum Window Care LimitedCleaning companies
- Aspire Land Property LimitedProperty developers
- Kernow Property Portfolio LtdProperty developers
- Bould Landscapes LimitedLandscapers and gardeners
- Rustic Homes LtdProperty developers
- Rustic Property LtdProperty developers
- Balustrade Solutions Cornwall LimitedInstallers
- R&L Developments Group LtdBuilders
Also registered at this address
21 other companies use the same registered office as Cornwall Damp-Proofing Ltd.
- Askbs LimitedJoiners and carpenters
- Celtic Stone & Conservation LtdSpecialist contractors
- D and D Plastering LtdPlasterers
- DM Flooring LtdFloor and wall tilers
- G.Barnes LtdPlumbers and heating engineers
- Hanbury Grange Homes LimitedProperty developers
- J B Hill Motor Mechanic LimitedMechanics and garages
- JLK Builders LimitedBuilders
- Kernowek Gardeners LtdLandscapers and gardeners
- KP & Sons Transport LtdMechanics and garages
- Long Ash Service Station LimitedMotor traders
- Mac Construction (Cornwall) LimitedBuilders
- Mal-VW LimitedMechanics and garages
- Pro-Electric LimitedElectricians
- Rad Construction LtdBuilders
- Sam Rossi LimitedProperty developers
- Steve Drury Kitchens LimitedInstallers
- T C J Osborne LimitedMechanics and garages
- Tide Property Cornwall LimitedProperty developers
- Tidy Ladybird Cleaning Service LtdCleaning companies
- TMS (Technical Solutions) LimitedMotor traders
What happens if Cornwall Damp-Proofing 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 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
- 09573062
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 May 2015 (11 years ago)
- Registered office
- ST Denys House, 22 East Hill, St Austell, Cornwall, PL25 4TR
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 5 May 2026
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 St Austell
Other active installation companies (insulation, lifts, shutters and similar) registered in St Austell.
- Ewi Systems (South West) Limited2012
- Property Adaptations & Renovations S.W. Limited2013
- Roller Bathrooms Ltd2018
- Steve Drury Kitchens Limited2013
- The Window Repair Centre (South West) Ltd2010
- Westview Windows PVC-U and Aluminium Ltd2022
- Balustrade Solutions Cornwall Limited2026
- C.B.Hopkins Dry Lining Services Ltd2021
All installation companies (insulation, lifts, shutters and similar) in St Austell · All trades in St Austell · Installers across the UK
Frequently asked questions
When are Cornwall Damp-Proofing Ltd's accounts due?
Cornwall Damp-Proofing Ltd's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is Cornwall Damp-Proofing Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Cornwall Damp-Proofing Ltd still trading?
Cornwall Damp-Proofing 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 Cornwall Damp-Proofing Ltd do?
Cornwall Damp-Proofing Ltd is registered under Other construction installation (SIC 43290).
How old is Cornwall Damp-Proofing Ltd?
Cornwall Damp-Proofing Ltd was incorporated on 5 May 2015, 11 years ago.
What is the penalty if Cornwall Damp-Proofing 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 Cornwall Damp-Proofing 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.