- Company number
- 04535981
- Incorporated
- 16 Sep 200224 years trading
- Registered office
- Unit 13 Walk Mills, The Walk, Keighley, West Yorkshire, BD21 5AR
- Nature of business
- Construction of commercial buildings; Other specialised construction activities n.e.c.
Mortimer Site Services Limited is a 24-year-old private limited company registered in Keighley, company number 04535981, one of 64 building contractors in Keighley. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £15K (+5.1%) on the year before, to £307K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £338K against £112K owed within a year: 3.0 times cover.
- 17 employees on average, up from 16 the year before.
- 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 Aug 2025 | £307K | £135K | £338K | £112K | 17 |
| 31 Aug 2024 | £292K | £183K | £361K | £162K | 16 |
| 31 Aug 2023 | £304K | £144K | £368K | £137K | 13 |
| 31 Aug 2022 | £263K | £164K | £343K | £115K | 15 |
| 31 Aug 2021 | £225K | £199K | £326K | £90K | 14 |
| 31 Aug 2020 | £250K | £224K | £343K | £145K | 14 |
| 31 Aug 2019 | £307K | £196K | £378K | £127K | |
| 31 Aug 2018 | £339K | £232K | £424K | £168K | |
| 31 Aug 2017 | £345K | £98K | £448K | £210K | |
| 31 Aug 2016 | £263K | £83K | £346K | £158K |
Where Mortimer Site Services Limited is registered
The registered office is in Keighley (BD21), in the Bradford local authority area, Yorkshire and The Humber. Show BD21 5AR on a map.
Other trade companies in BD21
- Volvtech LtdMechanics and garages
- TK Building & Plastering LtdPlasterers
- Voltedge Electrical Service's LtdElectricians
- Capital Car Sales LimitedMotor traders
- Kaystruct LtdCivil engineering
- Avcauc LtdCleaning companies
- Yw Motors LtdMotor traders
- Cutting Edge Joinery LtdJoiners and carpenters
What happens if Mortimer Site Services 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 04535981
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 September 2002 (24 years ago)
- Registered office
- Unit 13 Walk Mills, The Walk, Keighley, West Yorkshire, BD21 5AR
- Nature of business
- Construction of commercial buildings (SIC 41201)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 29 August 2026
- Charges (mortgages)
- 1 outstanding of 1 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 Keighley
Other active building contractors registered in Keighley.
- MRH Builders (UK) Ltd2013
- N.A.C. Associates Limited1996
- Newmark Developments (Yorkshire) Limited2022
- Orion Metal Doors Ltd2025
- Oxenhope SPV 1 Limited2026
- Paul Anderson Builders Ltd2017
- Pinnacle View Homes (Yorkshire) Ltd2016
- PRPM Yorkshire Ltd2026
All building contractors in Keighley · All trades in Keighley · Builders across the UK
Frequently asked questions
When are Mortimer Site Services Limited's accounts due?
Mortimer Site Services Limited's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is Mortimer Site Services Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Mortimer Site Services Limited still trading?
Mortimer Site Services 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 Mortimer Site Services Limited do?
Mortimer Site Services Limited is registered under Construction of commercial buildings (SIC 41201); Other specialised construction activities n.e.c. (SIC 43999).
How old is Mortimer Site Services Limited?
Mortimer Site Services Limited was incorporated on 16 September 2002, 24 years ago.
What is the penalty if Mortimer Site Services 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 Mortimer Site Services 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.