- Companies
- Builders
- Sunderland
- Tandem Construction Ltd
Tandem Construction Ltd
- Company number
- 13436196
- Incorporated
- 3 Jun 20215 years trading
- Registered office
- Suite 5 Waterside House, Sunderland Business Park, Sunderland, Tyne And Wear, SR5 2TZ
- Nature of business
- Construction of domestic buildings
Tandem Construction Ltd is a 5-year-old private limited company registered in Sunderland, company number 13436196, one of 72 building contractors in Sunderland. Its next accounts are due at Companies House on 29 March 2027, and the CT600 for the period to 29 June 2026 is due at HMRC on 29 June 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 £35K (-9.9%) on the year before, to £318K.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £643K against £279K owed within a year: 2.3 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £318K | £78K | £643K | £279K | 3 |
| 30 Jun 2024 | £353K | £217K | £594K | £254K | 3 |
| 30 Jun 2023 | £437K | £359K | £882K | £457K | 3 |
| 30 Jun 2022 | £52K | £250K | £149K | 3 |
Public contracts won
Tandem Construction Ltd has one public sector contract award on record (2025). Source: Contracts Finder and Find a Tender award notices. For all 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. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Prosper | New Build Development Framework | Ceiling, not shown | 22 Jul 2025 |
Where Tandem Construction Ltd is registered
The registered office is in Sunderland (SR5), in the Sunderland local authority area, North East. Show SR5 2TZ on a map.
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- Ayo Merchants UK LimitedMotor traders
- Devlin Electrical Services LtdElectricians
- BG Building & Facilities LtdPlumbers and heating engineers
- Imo Car Wash Washington LtdCleaning companies
- Al Blades LtdMachinery repair and installation
What happens if Tandem Construction 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 29 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Mar 2027 to 29 Apr 2027 | £150 |
| 1 to 3 months late | 30 Apr 2027 to 29 Jun 2027 | £375 |
| 3 to 6 months late | 30 Jun 2027 to 29 Sep 2027 | £750 |
| More than 6 months late | From 30 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 30 Jun 2027 | £200 |
| 3 months late | 29 Sep 2027 | another £200 |
| 6 months late | 29 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 29 Jun 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
- 13436196
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 June 2021 (5 years ago)
- Registered office
- Suite 5 Waterside House, Sunderland Business Park, Sunderland, Tyne And Wear, SR5 2TZ
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 29 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 23 April 2026
- Charges (mortgages)
- 3 outstanding of 3 registered
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Sunderland
Other active building contractors registered in Sunderland.
- Tilbury Maintenance & Repairs Ltd2025
- Titan Construction Limited2021
- Tower GM Ltd2017
- TRK Building Services Limited2025
- TW Brickwork Ltd2026
- United Design & Build Limited2016
- Wansfell Property Services Limited2026
- Wear Builders Limited2013
All building contractors in Sunderland · All trades in Sunderland · Builders across the UK
Frequently asked questions
When are Tandem Construction Ltd's accounts due?
Tandem Construction Ltd's next accounts are due at Companies House by 29 March 2027 (in 168 days), covering the period to 29 June 2026.
When is Tandem Construction Ltd's CT600 due?
The CT600 for the period to 29 June 2026 is due at HMRC by 29 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 30 March 2027.
Is Tandem Construction Ltd still trading?
Tandem Construction 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 Tandem Construction Ltd do?
Tandem Construction Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Tandem Construction Ltd?
Tandem Construction Ltd was incorporated on 3 June 2021, 5 years ago.
Has Tandem Construction Ltd won public sector contracts?
Yes. Tandem Construction Ltd has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from PROSPER.
What is the penalty if Tandem Construction 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 Tandem Construction 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.