- Companies
- Specialist contractors
- Harleston
- Cornerstone (East Anglia) Ltd
Cornerstone (East Anglia) Ltd
- Company number
- 05117129
- Incorporated
- 30 Apr 200422 years trading
- Registered office
- Unit 2 - 4, Fuller Road, Harleston, IP20 9EA
- Nature of business
- Other specialised construction activities n.e.c.
Cornerstone (East Anglia) Ltd is a 22-year-old private limited company registered in Harleston, company number 05117129, one of 7 specialist construction companies in Harleston. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £946K (+51.4%) on the year before, to £2.8M.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £3.8M against £1.5M owed within a year: 2.5 times cover.
- 29 employees on average, down from 34 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 Jan 2025 | £2.8M | £1.4M | £3.8M | £1.5M | 29 |
| 31 Jan 2024 | £1.8M | £1.1M | £2.7M | £1.3M | 34 |
| 31 Jan 2023 | £2.2M | £1.8M | £3.1M | £1.2M | 31 |
| 31 Jan 2022 | £739K | £578K | £1.5M | £815K | 30 |
| 31 Jan 2021 | £947K | £146K | £1.6M | £708K | 26 |
| 31 Jan 2020 | £775K | £142K | £1.1M | £397K | 18 |
| 31 Jan 2019 | £683K | £191K | £1.1M | £434K | 24 |
| 31 Jan 2018 | £916K | £385K | £1.6M | £822K | 19 |
| 31 Jan 2017 | £516K | £64K | £1.4M | £978K | 17 |
| 31 Jan 2016 | £981K | £0 | £1.6M | £731K |
Public contracts won
Cornerstone (East Anglia) Ltd has 28 public sector contract awards on record; the ones with their own published value total £32M, from 2015 to 2026. Source: Contracts Finder and Find a Tender award notices. For 19 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. 22 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Suffolk County Council3 awards
- Efficiency East Midlands Limited2 awards
- Flagship Housing Limited2 awards
- Flagship Housing Group2 awards
- Cambridge City Council2 awards
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Central Bedfordshire Council | Warm Homes Local Grant - 01092025 | £800K | 13 May 2026 |
| Efficiency East Midlands Limited | EEM0046 Retrofit, Insulation and Associated Works Framework | Ceiling, not shown | 23 Feb 2026 |
| Nottingham City Council | (CPU 7901) Energy Efficiency Works Wave 3 - Nottingham City Council Housing Services | Ceiling, not shown | 4 Dec 2025 |
| Suffolk County Council | Warm Homes Suffolk Energy Efficiency and Renewables Retrofit Framework | Ceiling, not shown | 17 Nov 2025 |
| Flagship Housing Limited | Energy Efficiency Retrofit Installation Contractors and Consultants and associated services | Ceiling, not shown | 17 Oct 2025 |
| Flagship Housing Limited | Energy Efficiency Retrofit Installation Contractors and Consultants and associated services | £20M | 17 Oct 2025 |
| Oadby & Wigston Borough Council | (DPS 7713) Whole House Retrofit Main Contractor WHLG - Oadby & Wigston BC | Ceiling, not shown | 19 Sep 2025 |
| Prosper | *Decarbonisation & Investment Works Framework [DN762948] | Ceiling, not shown | 20 Jun 2025 |
| LHC Procurement Group | Retrofit and Decarbonisation Framework | Ceiling, not shown | 18 Feb 2025 |
| Suffolk County Council | Suffolk Energy Action Framework | Ceiling, not shown | 16 Nov 2023 |
Showing the 10 most recent of 28.
Where Cornerstone (East Anglia) Ltd is registered
The registered office is in Harleston (IP20), in the South Norfolk local authority area, East of England. Show IP20 9EA on a map.
Other trade companies in IP20
- Andrew P Read LtdGroundworks and demolition
- Thermotech Plumbing & Heating LtdPlumbers and heating engineers
- Adapt & Construction LtdSpecialist contractors
- Prem E Air LtdPlumbers and heating engineers
- Sash Radiant Shine LtdCleaning companies
- DGSH Developments LtdFinishing trades
- GRB Energy LtdElectricians
- Vincent's Motor Works LtdMechanics and garages
What happens if Cornerstone (East Anglia) 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 05117129
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 April 2004 (22 years ago)
- Registered office
- Unit 2 - 4, Fuller Road, Harleston, IP20 9EA
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 30 April 2026
- Charges (mortgages)
- 1 outstanding of 2 registered
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 Harleston
Other active specialist construction companies registered in Harleston.
- Edward Grant Projects Limited2016
- J. Earl Fencing Ltd2003
- O.J Fencing Ltd2016
- Sae Events Ltd2024
- Waveney Construction Landscapes Civils Ltd2018
- Adapt & Construction Ltd2026
All specialist construction companies in Harleston · All trades in Harleston · Specialist contractors across the UK
Frequently asked questions
When are Cornerstone (East Anglia) Ltd's accounts due?
Cornerstone (East Anglia) Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Cornerstone (East Anglia) Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Cornerstone (East Anglia) Ltd still trading?
Cornerstone (East Anglia) 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 Cornerstone (East Anglia) Ltd do?
Cornerstone (East Anglia) Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Cornerstone (East Anglia) Ltd?
Cornerstone (East Anglia) Ltd was incorporated on 30 April 2004, 22 years ago.
Has Cornerstone (East Anglia) Ltd won public sector contracts?
Yes. Cornerstone (East Anglia) Ltd has 28 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £32M), most recently from Central Bedfordshire Council.
What is the penalty if Cornerstone (East Anglia) 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 Cornerstone (East Anglia) 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.