- Company number
- 01175943
- Incorporated
- 2 Jul 197452 years trading
- Registered office
- 47 Furnace Lane, Woodhouse Mill, Sheffield, S13 9XB
- Nature of business
- Construction of commercial buildings
Dolphin (Sheffield) Limited is a 52-year-old private limited company registered in Sheffield, company number 01175943, one of 442 building contractors in Sheffield. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Dolphin (Sheffield) LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Public contracts won
Dolphin (Sheffield) Limited has 15 public sector contract awards on record; the ones with their own published value total £1.5M, from 2016 to 2024. Source: Contracts Finder and Find a Tender award notices. For 1 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. 3 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Sheffield Hallam University8 awards
- University of Sheffield2 awards
- Peak District National Park Authority1 award
- Barnsley Nhs Trust1 award
- Sheffield City Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Peak District National Park Authority | Refurbishment works to campsite amenity building | £34K | 17 Dec 2024 |
| Barnsley Nhs Trust | C22-15 Relocation of Medical Engineering - Minor Works | £46K | 11 Nov 2022 |
| University of Sheffield | 2528/SW Geography Building Roofing Works and Window Replacement | £614K | 23 Sep 2020 |
| Sheffield City Council | Re05819 - Mossbrook School Kitchen Improvements | £88K | 29 Jun 2020 |
| South Yorkshire Fire and Rescue Service | Fleet Workshops Collaboration Project | £273K | 7 Feb 2020 |
| University of Sheffield | 2320/JR Internal Refurbishment Works - Geography & Planning Building | £232K | 19 Aug 2019 |
| Sheffield Hallam University | 1819-76-FDR-AJ - Carpet and Decoration Works, Cantor Building | £23K | 8 May 2019 |
| Sheffield Hallam University | Hallam Helpdesks (Phase 3) - Stoddart Building, City Campus | £28K | 18 Oct 2018 |
| Sheffield Hallam University | Carry Out Remedial Repairs & Electrical Inspections, Various Locations | £25K | 16 Aug 2018 |
| Sheffield Hallam University | Refresh of Careers and Employability Centre | £29K | 8 Aug 2018 |
Showing the 10 most recent of 15.
Where Dolphin (Sheffield) Limited is registered
The registered office is in Sheffield (S13), in the Sheffield local authority area, Yorkshire and The Humber. Show S13 9XB on a map.
Other trade companies in S13
- Tansley Support Services LimitedRoofers
- PX Centre LtdMotor traders
- Eco-Gen Electrical Group LtdElectricians
- Detailed Cleaning Services LtdCleaning companies
- JC Cooling Solutions LtdPlumbers and heating engineers
- Powertherm Industrial Access LimitedInstallers
- Steel City Vehicle Solutions LtdMotor traders
- S.L.G Construction LimitedCivil engineering
What happens if Dolphin (Sheffield) 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 01175943
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 July 1974 (52 years ago)
- Registered office
- 47 Furnace Lane, Woodhouse Mill, Sheffield, S13 9XB
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 31 July 2026
- Charges (mortgages)
- 1 outstanding of 1 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 Sheffield
Other active building contractors registered in Sheffield.
- Domac Fire Pro Ltd2018
- Door to Dormer Ltd2026
- Doublesure Home Improvements Ltd2019
- Dudley Magee Group Limited2026
- DWW Electrical Ltd2023
- E.A. Moore Builders Limited1966
- E35 Properties Limited2024
- Easton & Green Ltd2025
All building contractors in Sheffield · All trades in Sheffield · Builders across the UK
Frequently asked questions
When are Dolphin (Sheffield) Limited's accounts due?
Dolphin (Sheffield) Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Dolphin (Sheffield) Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Dolphin (Sheffield) Limited still trading?
Dolphin (Sheffield) 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 Dolphin (Sheffield) Limited do?
Dolphin (Sheffield) Limited is registered under Construction of commercial buildings (SIC 41201).
How old is Dolphin (Sheffield) Limited?
Dolphin (Sheffield) Limited was incorporated on 2 July 1974, 52 years ago.
Has Dolphin (Sheffield) Limited won public sector contracts?
Yes. Dolphin (Sheffield) Limited has 15 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £1.5M), most recently from Peak District National Park Authority.
What is the penalty if Dolphin (Sheffield) 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 Dolphin (Sheffield) 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.