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- Southampton
- Sienna Construction Limited
Sienna Construction Limited
- Company number
- 08015068
- Incorporated
- 2 Apr 201214 years trading
- Registered office
- 14 Mitchell Point Ensign Way, Hamble-Le-Rice, Southampton, Hampshire, SO31 4RF
- Nature of business
- Construction of commercial buildings; Construction of roads and motorways; Construction of utility projects for fluids; Construction of utility projects for electricity and telecommunications
Sienna Construction Limited is a 14-year-old private limited company registered in Southampton, company number 08015068, one of 491 building contractors in Southampton. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £60K (+8.9%) on the year before, to £736K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £2M against £1.6M owed within a year: 1.2 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 Oct 2025 | £736K | £805K | £2M | £1.6M | 0 |
| 31 Oct 2024 | £676K | £725K | £2.1M | £1.6M | 37 |
| 31 Oct 2023 | £483K | £313K | £1.7M | £1.4M | 31 |
| 30 Apr 2022 | £360K | £342K | £989K | £643K | 28 |
| 30 Apr 2021 | £302K | £645K | £1.1M | £703K | 34 |
| 30 Apr 2020 | £256K | £418K | £993K | £819K | 34 |
| 30 Apr 2019 | £442K | £227K | £1.5M | £1.2M | 34 |
| 30 Apr 2018 | £364K | £341K | £1.1M | £861K | 33 |
| 30 Apr 2017 | £343K | £690K | £1.7M | £1.4M | 32 |
| 30 Apr 2016 | £188K | £303K | £709K | £592K |
Public contracts won
Sienna Construction Limited has 6 public sector contract awards on record; the ones with their own published value total £1.8M, from 2018 to 2024. Source: Contracts Finder and Find a Tender award notices. For 3 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. 2 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Swindon Borough Council3 awards
- KBS Maritime Limited1 award
- SSE Stock Limited1 award
- Southampton City Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| KBS Maritime Limited | KBS/0124/T/MCS1/NK The KBS Multi Discipline Subcontractor Framework 2024 | Ceiling, not shown | 25 Oct 2024 |
| SSE Stock Limited | FW Supply & Deliver - ASL with drop out fuse switch -Multi Site | Ceiling, not shown | 14 May 2021 |
| Swindon Borough Council | Refurbishment Works Penhill Youth Centre and Espirit Academy/Gymnastics Centre Swindon | £591K | 29 Jul 2019 |
| Southampton City Council | Classroom Extension (& Associated External Works) at Fairisle Junior School, Southampton | £675K | 22 Jul 2019 |
| Swindon Borough Council | Framework Agreement for refurbishment and fit-out works to Swindon Borough Council Heritage Assets, including first parcel of works for Unit 11 Carriageworks | Ceiling, not shown | 6 May 2019 |
| Swindon Borough Council | Refurbishment of the Former Oxford Brookes Building, Swindon | £484K | 30 May 2018 |
Where Sienna Construction Limited is registered
The registered office is in Southampton (SO31), in the Eastleigh local authority area, South East. Show SO31 4RF on a map.
Other trade companies in SO31
- MNC Cleaning LtdCleaning companies
- Mars Eng. LtdMachinery repair and installation
- Amc Plumbing and Heating LtdPlumbers and heating engineers
- Pride & Bloom LtdLandscapers and gardeners
- Hampshire Heating and Cooling LtdPlumbers and heating engineers
- Kelpie Landscape & Build LtdFinishing trades
- FSC Facilities Services LtdInstallers
- Fitton & Redding Services LimitedMechanics and garages
What happens if Sienna Construction 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 08015068
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 April 2012 (14 years ago)
- Registered office
- 14 Mitchell Point Ensign Way, Hamble-Le-Rice, Southampton, Hampshire, SO31 4RF
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of roads and motorways (SIC 42110)
Construction of utility projects for fluids (SIC 42210)
Construction of utility projects for electricity and telecommunications (SIC 42220) - Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 1 September 2026
- Charges (mortgages)
- 0 outstanding of 1 registered
- Previous names
- Sienna Contractors Limited (until 2 Nov 2017)
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 Southampton
Other active building contractors registered in Southampton.
- Sign&Maintenance Ltd2026
- Silverwoods Construction Ltd2011
- Silverwoods South Limited2020
- Sitelines UK Limited2003
- SJ Savage Building & Property Maintenance Ltd2018
- SLK Property Solutions Ltd2018
- SM5 Developments Ltd2018
- SMH Plumbing and Heating Ltd2020
All building contractors in Southampton · All trades in Southampton · Builders across the UK
Frequently asked questions
When are Sienna Construction Limited's accounts due?
Sienna Construction Limited's next accounts are due at Companies House by 31 July 2027 (in 292 days), covering the period to 31 October 2026.
When is Sienna Construction Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Sienna Construction Limited still trading?
Sienna Construction 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 Sienna Construction Limited do?
Sienna Construction Limited is registered under Construction of commercial buildings (SIC 41201); Construction of roads and motorways (SIC 42110); Construction of utility projects for fluids (SIC 42210); Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is Sienna Construction Limited?
Sienna Construction Limited was incorporated on 2 April 2012, 14 years ago.
Has Sienna Construction Limited won public sector contracts?
Yes. Sienna Construction Limited has 6 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £1.8M), most recently from KBS MARITIME LIMITED.
What is the penalty if Sienna Construction 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 Sienna Construction 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.