- Companies
- Specialist contractors
- Northampton
- Sigma Maintenance Ltd
Sigma Maintenance Ltd
- Company number
- 15684498
- Incorporated
- 26 Apr 20242 years trading
- Registered office
- 14 Longmeadow, Wootton, Northampton, NN4 6AN
- Nature of business
- Other specialised construction activities n.e.c.
Sigma Maintenance Ltd is a 2-year-old private limited company registered in Northampton, company number 15684498, one of 258 specialist construction companies in Northampton. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 30 April 2025, as filed at Companies House.
Where Sigma Maintenance Ltd is registered
The registered office is in Northampton (NN4), in the West Northamptonshire local authority area, East Midlands. Show NN4 6AN on a map.
Other trade companies in NN4
- Marks Performance LtdMotor traders
- Midlands Lifting Services LtdSpecialist contractors
- Collingtree Group LtdBuilders
- Lab Electrical Solutions LtdElectricians
- BM Automotive Group LtdMechanics and garages
- Keenan Rentals LtdProperty developers
- Collingtree Cool LtdPlumbers and heating engineers
- Je Brickwork LtdBuilders
Also registered at this address
1 other company uses the same registered office as Sigma Maintenance Ltd.
- Asset Gas Services LtdPlumbers and heating engineers
What happens if Sigma Maintenance 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 31 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 15684498
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 April 2024 (2 years ago)
- Registered office
- 14 Longmeadow, Wootton, Northampton, NN4 6AN
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 25 April 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Northampton
Other active specialist construction companies registered in Northampton.
- Site Track Pro Ltd2020
- Sketchley Estimating Services Ltd2024
- Snag My Home Limited2024
- Snol Lifting Limited2025
- Specialist Ewi & Rendering Ltd2022
- Stef-Demolition Ltd2025
- Stones Building Contractors Limited2012
- Sub Blue Ltd2014
All specialist construction companies in Northampton · All trades in Northampton · Specialist contractors across the UK
Frequently asked questions
When are Sigma Maintenance Ltd's accounts due?
Sigma Maintenance Ltd's next accounts are due at Companies House by 31 January 2027 (in 111 days), covering the period to 30 April 2026.
When is Sigma Maintenance Ltd's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Sigma Maintenance Ltd still trading?
Sigma Maintenance 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 Sigma Maintenance Ltd do?
Sigma Maintenance Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Sigma Maintenance Ltd?
Sigma Maintenance Ltd was incorporated on 26 April 2024, 2 years ago.
What is the penalty if Sigma Maintenance 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 Sigma Maintenance 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.