- Companies
- Civil engineering
- Llanelli
- McNamara Offshore Services Ltd
McNamara Offshore Services Ltd
- Company number
- 17031040
- Incorporated
- 12 Feb 2026
- Registered office
- 77A Heol Y Pentre, Ponthenry, Llanelli, SA15 5PY
- Nature of business
- Construction of utility projects for electricity and telecommunications
McNamara Offshore Services Ltd is a newly incorporated private limited company registered in Llanelli, company number 17031040, one of 16 civil engineering contractors in Llanelli. Its next accounts are due at Companies House on 12 November 2027, and its first CT600 is due at HMRC on 11 February 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where McNamara Offshore Services Ltd is registered
The registered office is in Llanelli (SA15), in the Carmarthenshire local authority area, Wales. Show SA15 5PY on a map.
Other trade companies in SA15
- Annesley Street (Llanelli) LtdProperty developers
- A&J Landscapes and Property Maintenance LimitedLandscapers and gardeners
- A.C Electrics Llanelli LtdElectricians
- Blue Lagoon Paving & Patios LtdLandscapers and gardeners
- Gwyn Towns Installations LtdInstallers
- Ozma Developments LtdProperty developers
- Swansea Mobile Boat Engineers LtdMachinery repair and installation
- South Wales Bathrooms and Heating LtdPlumbers and heating engineers
What happens if McNamara Offshore Services 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 12 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 13 Nov 2027 to 12 Dec 2027 | £150 |
| 1 to 3 months late | 13 Dec 2027 to 12 Feb 2028 | £375 |
| 3 to 6 months late | 13 Feb 2028 to 12 May 2028 | £750 |
| More than 6 months late | From 13 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 2029 | 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
- 17031040
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 February 2026
- Registered office
- 77A Heol Y Pentre, Ponthenry, Llanelli, SA15 5PY
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 28 February (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Llanelli
Other active civil engineering contractors registered in Llanelli.
- Means Renewal Limited1998
- Millard Advisory Partners Ltd2026
- Millard Solutions Ltd2015
- MM&DM Building Services Limited2026
- Msurvey Ltd2017
- Sa Utility Services Limited2021
- Talyfan Contractors Ltd2021
- 3 M'S Timberframe & Carpentry Limited2009
All civil engineering contractors in Llanelli · All trades in Llanelli · Civil engineering across the UK
Frequently asked questions
When are McNamara Offshore Services Ltd's accounts due?
McNamara Offshore Services Ltd's next accounts are due at Companies House by 12 November 2027 (in 395 days), covering the period to 28 February 2027.
When is McNamara Offshore Services Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 11 February 2027, due by 11 February 2028, and one for the period to 28 February 2027, due by 28 February 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is McNamara Offshore Services Ltd still trading?
McNamara Offshore Services 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 McNamara Offshore Services Ltd do?
McNamara Offshore Services Ltd is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is McNamara Offshore Services Ltd?
McNamara Offshore Services Ltd was incorporated on 12 February 2026, less than a year ago.
What is the penalty if McNamara Offshore Services 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 McNamara Offshore Services 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.