- Company number
- 11835842
- Incorporated
- 19 Feb 20197 years trading
- Registered office
- 106-108 Stockingstone Road, Luton, Bedfordshire, LU2 7NF
- Nature of business
- Construction of commercial buildings
Shellmar Construction Limited is a 7-year-old private limited company registered in Luton, company number 11835842, one of 708 building contractors in Luton. 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.
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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 £1.1M (+517%) on the year before, to £1.3M.
- Net assets rose in 5 of 5 year-on-year comparisons on record.
- Current assets of £2.8M against £1.8M owed within a year: 1.6 times cover.
- 10 employees on average, up from 6 the year before.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £1.3M | £2.3M | £2.8M | £1.8M | 10 |
| 31 Mar 2024 | £203K | £114K | £453K | £425K | 6 |
| 31 Mar 2023 | £99K | £74K | £493K | £461K | 5 |
| 31 Mar 2022 | £39K | £60K | £436K | £385K | 5 |
| 31 Mar 2021 | £31K | £27K | £272K | £215K | 4 |
| 31 Mar 2020 | £28K | £50K | £182K | £149K | 1 |
Public contracts won
Shellmar Construction Limited has 3 public sector contract awards on record; the ones with their own published value total £409K, from 2025 to 2026. 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. 1 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- London Borough of Haringey1 award
- Brighton and Hove City Council1 award
- Sheffield City Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| London Borough of Haringey | 25-255 Down Lane Park Nursery Demolition Work | £69K | 17 Aug 2026 |
| Brighton and Hove City Council | BHCC JB Portslade Sports Centre Gym Expansion & Refurbishment | £340K | 2 Sep 2025 |
| Sheffield City Council | Short Breaks for Disabled Children Framework - Day time Short Breaks, Outward Bounds and Activity Based Residential for children in Sheffield | Ceiling, not shown | 1 Jan 2025 |
Where Shellmar Construction Limited is registered
The registered office is in Luton (LU2), in the Luton local authority area, East of England. Show LU2 7NF on a map.
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Also registered at this address
2 other companies use the same registered office as Shellmar Construction Limited.
- Shellmar Groundworks LtdGroundworks and demolition
- Shellmar M&E LtdElectricians
What happens if Shellmar 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 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
- 11835842
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 February 2019 (7 years ago)
- Registered office
- 106-108 Stockingstone Road, Luton, Bedfordshire, LU2 7NF
- 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
- 18 February 2026
- Charges (mortgages)
- 1 outstanding of 2 registered
- Previous names
- Tomrock Civil Limited (until 19 Mar 2019)
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 Luton
Other active building contractors registered in Luton.
- Shera Construction Ltd2024
- Sheriff Brickwork Limited2019
- Sheriff Construction Limited2005
- Shoti Ltd2026
- Sibilia Ltd2026
- Silver Star Security Ltd2019
- Simon Adrian Contractors Ltd2012
- Simplu Si Atat Limited2025
All building contractors in Luton · All trades in Luton · Builders across the UK
Frequently asked questions
When are Shellmar Construction Limited's accounts due?
Shellmar Construction 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 Shellmar Construction 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 Shellmar Construction Limited still trading?
Shellmar 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 Shellmar Construction Limited do?
Shellmar Construction Limited is registered under Construction of commercial buildings (SIC 41201).
How old is Shellmar Construction Limited?
Shellmar Construction Limited was incorporated on 19 February 2019, 7 years ago.
Has Shellmar Construction Limited won public sector contracts?
Yes. Shellmar Construction Limited has 3 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £409K), most recently from London Borough of Haringey.
What is the penalty if Shellmar 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 Shellmar 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.