- Company number
- SC651723
- Incorporated
- 16 Jan 20206 years trading
- Registered office
- 13 Aitken Place, Lanark, South Lanarkshire, ML11 7PU
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
William Gilfillan Ltd Ltd is a 6-year-old private limited company registered in Lanark, company number SC651723, one of 36 building contractors in Lanark. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £28K (+890.8%) on the year before, to £31K.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £18K against £19K owed within a year: 0.9 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £31K | £18K | £19K | 1 | |
| 31 Jan 2024 | £3,172 | £38K | £35K | 1 | |
| 31 Jan 2023 | £26K | £37K | £10K | 1 | |
| 31 Jan 2022 | £4,866 | £11K | £5,656 | 1 | |
| 31 Jan 2021 | £4,866 | £11K | £5,656 | 1 |
Who runs and owns William Gilfillan Ltd Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| W*** G*** | Director | Jan 2020 |
Person with significant control
Where William Gilfillan Ltd Ltd is registered
The registered office is in Lanark (ML11), in the South Lanarkshire local authority area, Scotland. Show ML11 7PU on a map.
Other trade companies in ML11
- Sterling Renewables Projects LimitedElectricians
- Ejp Kitchens & Bathrooms LtdJoiners and carpenters
- J Frood Double Glazing LtdGlaziers
- Duchray Holdings LimitedSpecialist contractors
- RM Offshore LtdInstallers
- Fletcher Groundworks LimitedInstallers
- Beechtreewright LtdBuilders
- Blackwood Electrical Services LtdElectricians
What happens if William Gilfillan Ltd 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- SC651723
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 January 2020 (6 years ago)
- Registered office
- 13 Aitken Place, Lanark, South Lanarkshire, ML11 7PU
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 15 January 2026
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 Lanark
Other active building contractors registered in Lanark.
- A. Lennox Homes Limited2005
- Abernethy Homes Limited2019
- Beechtreewright Ltd2026
- Biggar Construction Limited2016
- Brian Steele Joiners & Builders Limited2013
- CJC Bellefield Ltd2025
- CMC Design Limited2007
- Construction-Team.UK Limited2026
All building contractors in Lanark · All trades in Lanark · Builders across the UK
Frequently asked questions
When are William Gilfillan Ltd Ltd's accounts due?
William Gilfillan Ltd Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is William Gilfillan Ltd Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is William Gilfillan Ltd Ltd still trading?
William Gilfillan Ltd 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 William Gilfillan Ltd Ltd do?
William Gilfillan Ltd Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is William Gilfillan Ltd Ltd?
William Gilfillan Ltd Ltd was incorporated on 16 January 2020, 6 years ago.
Who runs William Gilfillan Ltd Ltd?
William Gilfillan Ltd Ltd has 1 active director, the longest-serving appointed in Jan 2020. Their names and service addresses are on the Companies House register.
Who owns William Gilfillan Ltd Ltd?
One person or company has significant control of William Gilfillan Ltd Ltd: an individual (owns 75% or more of the shares).
What is the penalty if William Gilfillan Ltd 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 William Gilfillan Ltd 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.