- Company number
- SC113610
- Incorporated
- 29 Sep 198838 years trading
- Registered office
- 2 ST Andrew Street, Peterhead, Aberdeenshire, AB42 1DS
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings; Electrical installation; Plumbing, heat and air-conditioning installation
Alexander Duthie & Sons Limited is a 38-year-old private limited company registered in Peterhead, company number SC113610, one of 16 building contractors in Peterhead. Its next accounts are due at Companies House on 31 December 2026, and its first CT600 is due at HMRC on 31 December 2026.
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 down £93K (-3.9%) on the year before, to £2.3M.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £3.1M against £951K owed within a year: 3.3 times cover.
- 4 employees on average, down from 12 the year before.
- Balance sheets on record for 9 years, 2016 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2024 | £2.3M | £346K | £3.1M | £951K | 4 |
| 31 Dec 2023 | £2.4M | £250K | £3.1M | £948K | 12 |
| 31 Dec 2022 | £3.7M | £1.4M | £4.6M | £1.1M | 20 |
| 31 Dec 2021 | £3.6M | £817K | £4.3M | £939K | 24 |
| 31 Dec 2020 | £15M | £9.5M | £14M | £1.2M | 26 |
| 31 Dec 2019 | £15M | £9.4M | £14M | £1.4M | 46 |
| 31 Dec 2018 | £15M | £8.9M | £14M | £1.4M | 50 |
| 31 Dec 2017 | £14M | £8.5M | £13M | £1.6M | 49 |
| 31 Dec 2016 | £13M | £8.6M | £13M | £1.9M |
Where Alexander Duthie & Sons Limited is registered
The registered office is in Peterhead (AB42), in the Aberdeenshire local authority area, Scotland. Show AB42 1DS on a map.
Other trade companies in AB42
- Sunnyside Scaffolding Services LtdScaffolders
- Ga Groundworx LtdLandscapers and gardeners
- The Gardener Mannie LtdLandscapers and gardeners
- Snag My Gaff LtdFinishing trades
- The Scuff Mannie LtdMechanics and garages
- Milne Property Maintenance LtdSpecialist contractors
- Servquip LtdMachinery repair and installation
- GJ Services (Scotland) LtdCivil engineering
Also registered at this address
1 other company uses the same registered office as Alexander Duthie & Sons Limited.
- A R D Properties LimitedProperty developers
What happens if Alexander Duthie & 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 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
- SC113610
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 September 1988 (38 years ago)
- Registered office
- 2 ST Andrew Street, Peterhead, Aberdeenshire, AB42 1DS
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202)
Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220) - Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2024
- Last confirmation statement
- 2 March 2026
- Charges (mortgages)
- 2 outstanding of 4 registered
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 Peterhead
Other active building contractors registered in Peterhead.
- Cairngorm Construction Limited2024
- DM Joinery Ltd2025
- Grampian Steel Buildings Ltd.2004
- Jwe Homes Ltd2022
- KBP (Scotland) Ltd2013
- Kirktown Homes Ltd2021
- L G C Homes Limited2021
- Macleod & Noble Ltd.2001
All building contractors in Peterhead · All trades in Peterhead · Builders across the UK
Frequently asked questions
When are Alexander Duthie & Sons Limited's accounts due?
Alexander Duthie & Sons 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 Alexander Duthie & Sons Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 December 2025, due by 31 December 2026, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Alexander Duthie & Sons Limited still trading?
Alexander Duthie & 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 Alexander Duthie & Sons Limited do?
Alexander Duthie & Sons Limited is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202); Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Alexander Duthie & Sons Limited?
Alexander Duthie & Sons Limited was incorporated on 29 September 1988, 38 years ago.
What is the penalty if Alexander Duthie & 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 Alexander Duthie & 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.