- Companies
- Builders
- Mexborough
- Medlock & Sons Limited
Medlock & Sons Limited
- Company number
- 06019901
- Incorporated
- 6 Dec 200619 years trading
- Registered office
- 39/43 Bridge Street, Swinton, Mexborough, South Yorkshire, S64 8AP
- Nature of business
- Construction of domestic buildings
Medlock & Sons Limited is a 19-year-old private limited company registered in Mexborough, company number 06019901, one of 33 building contractors in Mexborough. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £27K (+34.3%) on the year before, to £105K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £139K against £13K owed within a year: more than 10 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £105K | £16K | £139K | £13K | 0 |
| 31 Dec 2024 | £78K | £4,741 | £155K | £20K | 0 |
| 31 Dec 2023 | £66K | £5,002 | £155K | £59K | 1 |
| 31 Dec 2022 | £44K | £23K | £108K | £30K | 1 |
| 31 Dec 2021 | £49K | £33K | £164K | £75K | 1 |
| 31 Dec 2020 | £57K | £65K | £281K | £100K | 1 |
| 31 Dec 2019 | £30K | £137K | £107K | 1 | |
| 31 Dec 2018 | £39K | £9,357 | £158K | £91K | |
| 31 Dec 2017 | £95K | £322K | £111K | ||
| 31 Dec 2016 | £86K | £1,502 | £300K | £214K |
Where Medlock & Sons Limited is registered
The registered office is in Mexborough (S64), in the Rotherham local authority area, Yorkshire and The Humber. Show S64 8AP on a map.
Other trade companies in S64
- SB’S Home Improvements LtdRepair services
- S J Croome Construction LtdInstallers
- Sourc LtdElectricians
- Arc Building & Interiors LtdInstallers
- 3P Project Solutions LimitedSpecialist contractors
- A&H Tyres LtdMotor traders
- Northdale Construction LtdBuilders
- A.J.W Plumbing & Heating Northern LtdPlumbers and heating engineers
Shared registered office
89 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 Medlock & 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 06019901
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 December 2006 (19 years ago)
- Registered office
- 39/43 Bridge Street, Swinton, Mexborough, South Yorkshire, S64 8AP
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 6 December 2025
- Charges (mortgages)
- 4 outstanding of 10 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 Mexborough
Other active building contractors registered in Mexborough.
- New Horizon Property Ltd2023
- New Horizon Realty Ltd2025
- NJMM Brickwork Limited2024
- North Coast Construction (Northern) Limited2024
- Northdale Construction Ltd2026
- P A C Groundworks Limited2003
- Satchmo Construction Limited2025
- SNB Damp-Proofing Limited2021
All building contractors in Mexborough · All trades in Mexborough · Builders across the UK
Frequently asked questions
When are Medlock & Sons Limited's accounts due?
Medlock & Sons Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Medlock & Sons Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Medlock & Sons Limited still trading?
Medlock & 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 Medlock & Sons Limited do?
Medlock & Sons Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Medlock & Sons Limited?
Medlock & Sons Limited was incorporated on 6 December 2006, 19 years ago.
What is the penalty if Medlock & 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 Medlock & 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.