- Companies
- Specialist contractors
- Letchworth Garden City
- T C Seamarks (Shot & Sand Blasting) Limited
T C Seamarks (Shot & Sand Blasting) Limited
- Company number
- 05592689
- Incorporated
- 14 Oct 200520 years trading
- Registered office
- Unit 1B Focus 4, Fourth Avenue, Letchworth Garden City, Hertfordshire, SG6 2TU
- Nature of business
- Other specialised construction activities n.e.c.
T C Seamarks (Shot & Sand Blasting) Limited is a 20-year-old private limited company registered in Letchworth Garden City, company number 05592689, one of 14 specialist construction companies in Letchworth Garden City. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 down £24K (-11.2%) on the year before, to £191K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £200K against £28K owed within a year: 7.2 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £191K | £200K | £28K | 2 | |
| 30 Nov 2024 | £215K | £216K | £24K | 2 | |
| 30 Nov 2023 | £250K | £289K | £64K | 2 | |
| 30 Nov 2022 | £179K | £256K | £108K | 2 | |
| 30 Nov 2021 | £157K | £191K | £70K | 2 | |
| 30 Nov 2020 | £149K | £167K | £57K | 2 | |
| 30 Nov 2019 | £166K | £188K | £65K | 2 | |
| 30 Nov 2018 | £164K | £193K | £82K | ||
| 30 Nov 2017 | £93K | £149K | £91K | ||
| 30 Nov 2016 | £41K | £71K | £98K | £73K |
Where T C Seamarks (Shot & Sand Blasting) Limited is registered
The registered office is in Letchworth Garden City (SG6), in the North Hertfordshire local authority area, East of England. Show SG6 2TU on a map.
Other trade companies in SG6
- Combined Auto Services LimitedMotor traders
- G.O.A.L Energy Services LtdElectricians
- Bedmond Construction LtdProperty developers
- Barski Property Care LtdBuilders
- PK Construction and Stones LimitedBuilders
- McCormack Maintenance LtdCivil engineering
- Nitdas Cleaning Solution LtdCleaning companies
- Nbtotalproperty LtdLandscapers and gardeners
Also registered at this address
12 other companies use the same registered office as T C Seamarks (Shot & Sand Blasting) Limited.
- Blue Whale Plumbing and Heating LtdPlumbers and heating engineers
- Brown's Antiques, Billiards & Interiors LimitedRepair services
- Bywater Plumbing & Heating LimitedPlumbers and heating engineers
- D M Petroleum Services LimitedInstallers
- Dilpreet Brickwork LtdBuilders
- First Choice Scaffolding LimitedScaffolders
- Igb Fencing LimitedJoiners and carpenters
- L B P Plumbing and Heating LimitedPlumbers and heating engineers
- Nomoli Holdings (Roydon) LimitedProperty developers
- Polo Painters & Protective Coatings LtdPainters and decorators
- Prefer 2 Trade LtdMotor traders
- R & P Bloss Builders LimitedBuilders
What happens if T C Seamarks (Shot & Sand Blasting) 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 05592689
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 October 2005 (20 years ago)
- Registered office
- Unit 1B Focus 4, Fourth Avenue, Letchworth Garden City, Hertfordshire, SG6 2TU
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 14 October 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 Letchworth Garden City
Other active specialist construction companies registered in Letchworth Garden City.
- Bevan Construction Limited2023
- Damp Proofing & Building Specialists Ltd2025
- Dave Morgan Limited2018
- Essential Water Services (UK) Ltd2009
- Fortem Ods Limited2026
- Graham Property Solutions Ltd2025
- Harcross Specialist Contractors Limited1999
- Icon Connect Limited1987
All specialist construction companies in Letchworth Garden City · All trades in Letchworth Garden City · Specialist contractors across the UK
Frequently asked questions
When are T C Seamarks (Shot & Sand Blasting) Limited's accounts due?
T C Seamarks (Shot & Sand Blasting) Limited's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is T C Seamarks (Shot & Sand Blasting) Limited's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is T C Seamarks (Shot & Sand Blasting) Limited still trading?
T C Seamarks (Shot & Sand Blasting) 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 T C Seamarks (Shot & Sand Blasting) Limited do?
T C Seamarks (Shot & Sand Blasting) Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is T C Seamarks (Shot & Sand Blasting) Limited?
T C Seamarks (Shot & Sand Blasting) Limited was incorporated on 14 October 2005, 20 years ago.
What is the penalty if T C Seamarks (Shot & Sand Blasting) 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 T C Seamarks (Shot & Sand Blasting) 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.