- Companies
- Installers
- Eastbourne
- GPB (Mastics) Ltd
GPB (Mastics) Ltd
- Company number
- 07361954
- Incorporated
- 1 Sep 201016 years trading
- Registered office
- 5 Cornfield Terrace, Eastbourne, BN21 4NN
- Nature of business
- Other construction installation
GPB (Mastics) Ltd is a 16-year-old private limited company registered in Eastbourne, company number 07361954, one of 50 installation companies (insulation, lifts, shutters and similar) in Eastbourne. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £55K (+13.7%) on the year before, to £455K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £561K against £154K owed within a year: 3.6 times cover.
- 5 employees on average, down from 6 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 Aug 2025 | £455K | £57K | £561K | £154K | 5 |
| 31 Aug 2024 | £400K | £773 | £539K | £181K | 6 |
| 31 Aug 2023 | £332K | £77K | £469K | £148K | 6 |
| 31 Aug 2022 | £266K | £385K | £125K | 7 | |
| 31 Aug 2021 | £231K | £345K | £98K | 7 | |
| 31 Aug 2020 | £179K | £281K | £63K | 7 | |
| 31 Aug 2019 | £196K | £276K | £92K | 8 | |
| 31 Aug 2018 | £135K | £249K | £130K | ||
| 31 Aug 2017 | £100K | £188K | £102K | ||
| 31 Aug 2016 | £61K | £57K | £188K | £135K |
Where GPB (Mastics) Ltd is registered
The registered office is in Eastbourne (BN21), in the Eastbourne local authority area, South East. Show BN21 4NN on a map.
Other trade companies in BN21
- Solaris Motors Solutions LimitedMechanics and garages
- Chartwell Design and Build LimitedBuilders
- The Sussex Flint Company LtdBuilders
- Wealden Property Services LimitedSpecialist contractors
- Oliver J Stean Plumbing & Heating LimitedPlumbers and heating engineers
- Ac Plastering & Rendering LtdPlasterers
- Coxon Construction Group LtdProperty developers
- Able Cleaning and Property Maintenance LimitedCleaning companies
Shared registered office
46 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if GPB (Mastics) 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 31 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 07361954
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 September 2010 (16 years ago)
- Registered office
- 5 Cornfield Terrace, Eastbourne, BN21 4NN
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 1 September 2025
- Previous names
- South Coast Mastics Ltd (until 7 Sep 2010)
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 Eastbourne
Other active installation companies (insulation, lifts, shutters and similar) registered in Eastbourne.
- Ground Screw Innovations Ltd2026
- Hopper Energy Ltd2026
- Huggett Home Improvements Ltd2026
- Insite Specialists Ltd2016
- J Group Glazing Limited2011
- Jmfra GT Limited2022
- Joslin Carpentry and Construction Limited2026
- JV Blinds Limited2022
All installation companies (insulation, lifts, shutters and similar) in Eastbourne · All trades in Eastbourne · Installers across the UK
Frequently asked questions
When are GPB (Mastics) Ltd's accounts due?
GPB (Mastics) Ltd's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is GPB (Mastics) Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is GPB (Mastics) Ltd still trading?
GPB (Mastics) Ltd is listed as active on the Companies House register (checked 12 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 GPB (Mastics) Ltd do?
GPB (Mastics) Ltd is registered under Other construction installation (SIC 43290).
How old is GPB (Mastics) Ltd?
GPB (Mastics) Ltd was incorporated on 1 September 2010, 16 years ago.
What is the penalty if GPB (Mastics) 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 GPB (Mastics) Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.