- Companies
- Finishing trades
- Hamilton
- William Montgomery & Sons Limited
William Montgomery & Sons Limited
- Company number
- SC343725
- Incorporated
- 2 Jun 200818 years trading
- Registered office
- 29 Brandon Street, Hamilton, South Lanarkshire, ML3 6DA
- Nature of business
- Other building completion and finishing
William Montgomery & Sons Limited is a 18-year-old private limited company registered in Hamilton, company number SC343725, one of 35 building finishing companies in Hamilton. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 £274K (+33.6%) on the year before, to £1.1M.
- Net assets rose in 7 of 8 year-on-year comparisons on record.
- Current assets of £1.4M against £417K owed within a year: 3.3 times cover.
- 31 employees on average, up from 28 the year before.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £1.1M | £677K | £1.4M | £417K | 31 |
| 30 Jun 2024 | £815K | £434K | £1.2M | £477K | 28 |
| 30 Jun 2023 | £625K | £260K | £867K | £273K | 17 |
| 30 Jun 2022 | £458K | £212K | £589K | £165K | 19 |
| 30 Jun 2021 | £331K | £154K | £547K | £249K | 15 |
| 30 Jun 2020 | £171K | £128K | £326K | £169K | 13 |
| 30 Jun 2019 | £134K | £37K | £278K | £162K | 10 |
| 30 Jun 2018 | £96K | £3 | £171K | £86K | 7 |
| 30 Jun 2017 | £103K | £72K | £208K | £108K | 9 |
Public contracts won
William Montgomery & Sons Limited has one public sector contract award on record; the ones with their own published value total £18K (2026). Source: Contracts Finder and Find a Tender award notices.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| UK Research and Innovation | CSP26572 - Building Trial Pits | £18K | 3 Jun 2026 |
Where William Montgomery & Sons Limited is registered
The registered office is in Hamilton (ML3), in the South Lanarkshire local authority area, Scotland. Show ML3 6DA on a map.
Other trade companies in ML3
- Horizon Joinery LtdJoiners and carpenters
- Grime Fighters Banbury LtdCleaning companies
- SM Energy Services LtdMachinery repair and installation
- Exceptional Distribution Services LtdRepair services
- Damp Solve LtdInstallers
- Ffcontracts LtdElectricians
- Rammz Paving LtdSpecialist contractors
- DLT Thistle Property Group LtdProperty developers
Shared registered office
72 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if William Montgomery & Sons 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- SC343725
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 June 2008 (18 years ago)
- Registered office
- 29 Brandon Street, Hamilton, South Lanarkshire, ML3 6DA
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 3 April 2026
Filing notes for building finishing companies
Finishing trade companies cover a wide range of work. Most are micro-entities with simple accounts and a straightforward CT600.
Similar companies in Hamilton
Other active building finishing companies registered in Hamilton.
- ZLS Home Improvements Ltd2018
- Aj Stone Masonry Ltd2020
- Anderson Property Services (Scotland) Limited2009
- Anna Maintenance Ltd2020
- Apsfm Ltd2026
- Apsis Project Management Ltd.2012
- Asplin Interior Design Ltd2019
- Asset Compliance Group Ltd2026
All building finishing companies in Hamilton · All trades in Hamilton · Finishing trades across the UK
Frequently asked questions
When are William Montgomery & Sons Limited's accounts due?
William Montgomery & Sons Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is William Montgomery & Sons Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is William Montgomery & Sons Limited still trading?
William Montgomery & Sons 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 William Montgomery & Sons Limited do?
William Montgomery & Sons Limited is registered under Other building completion and finishing (SIC 43390).
How old is William Montgomery & Sons Limited?
William Montgomery & Sons Limited was incorporated on 2 June 2008, 18 years ago.
Has William Montgomery & Sons Limited won public sector contracts?
Yes. William Montgomery & Sons Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £18K), most recently from UK Research and Innovation.
What is the penalty if William Montgomery & Sons 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 William Montgomery & Sons 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.