- Companies
- Installers
- London
- Isofit Mechanical Services Ltd
Isofit Mechanical Services Ltd
- Company number
- 17237389
- Incorporated
- 22 May 2026
- Registered office
- Adam House 7-10, Adam Street, London, WC2N 6AA
- Nature of business
- Other construction installation; Other specialised construction activities n.e.c.; Other engineering activities
Isofit Mechanical Services Ltd is a newly incorporated private limited company registered in London, company number 17237389, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 22 February 2028, and its first CT600 is due at HMRC on 21 May 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
File the first accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Isofit Mechanical Services LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Where Isofit Mechanical Services Ltd is registered
The registered office is in London (WC2N), in the Westminster local authority area, London. Show WC2N 6AA on a map.
Other trade companies in WC2N
- London Plumbing & Drainage Maintenance LimitedPlumbers and heating engineers
- LJD Projects LimitedCivil engineering
- Refuge Construction Group LimitedBuilders
- Adelphi Contractors LimitedBuilders
- Bretby Autobahn LimitedMotor traders
- CMCV Mechanical LimitedPlumbers and heating engineers
- Indtech Electrical Consultants LtdElectricians
- Ivory Swan Services LtdCleaning companies
Also registered at this address
1 other company uses the same registered office as Isofit Mechanical Services Ltd.
- Prestige Engineers Group LtdPlumbers and heating engineers
What happens if Isofit Mechanical Services 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 22 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 23 Feb 2028 to 22 Mar 2028 | £150 |
| 1 to 3 months late | 23 Mar 2028 to 22 May 2028 | £375 |
| 3 to 6 months late | 23 May 2028 to 22 Aug 2028 | £750 |
| More than 6 months late | From 23 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 2029 | 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
- 17237389
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 May 2026
- Registered office
- Adam House 7-10, Adam Street, London, WC2N 6AA
- Nature of business
- Other construction installation (SIC 43290)
Other specialised construction activities n.e.c. (SIC 43999)
Other engineering activities (SIC 71129) - Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- Isolairy Ltd2020
- Isolife12 Trading Ltd2020
- Itcc Services Ltd2025
- Its Done General Support Limited2025
- Iv Drylining Ltd2018
- Ivory Kitchens & Interiors Ltd2026
- Ivory Meridian Ltd2021
- J & B Property Rent and Maintenance Service Ltd2016
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are Isofit Mechanical Services Ltd's accounts due?
Isofit Mechanical Services Ltd's next accounts are due at Companies House by 22 February 2028 (in 497 days), covering the period to 31 May 2027.
When is Isofit Mechanical Services Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 21 May 2027, due by 21 May 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Isofit Mechanical Services Ltd still trading?
Isofit Mechanical Services 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 Isofit Mechanical Services Ltd do?
Isofit Mechanical Services Ltd is registered under Other construction installation (SIC 43290); Other specialised construction activities n.e.c. (SIC 43999); Other engineering activities (SIC 71129).
How old is Isofit Mechanical Services Ltd?
Isofit Mechanical Services Ltd was incorporated on 22 May 2026, less than a year ago.
What is the penalty if Isofit Mechanical Services 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 Isofit Mechanical Services 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.