- Companies
- Specialist contractors
- Glenrothes
- Smooth Air Ventilation Limited
Smooth Air Ventilation Limited
- Company number
- SC224853
- Incorporated
- 1 Nov 200124 years trading
- Registered office
- C/O Paterson Boyd & Co, 18 North Street, Glenrothes, Fife, KY7 5NA
- Nature of business
- Other specialised construction activities n.e.c.
Smooth Air Ventilation Limited is a 24-year-old private limited company registered in Glenrothes, company number SC224853, one of 15 specialist construction companies in Glenrothes. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £36K (+12.3%) on the year before, to £326K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £373K against £45K owed within a year: 8.3 times cover.
- 4 employees on average, up from 3 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 |
|---|---|---|---|---|---|
| 30 Nov 2025 | £326K | £373K | £45K | 4 | |
| 30 Nov 2024 | £290K | £331K | £39K | 3 | |
| 30 Nov 2023 | £267K | £298K | £31K | 5 | |
| 30 Nov 2022 | £252K | £288K | £38K | 5 | |
| 30 Nov 2021 | £219K | £263K | £46K | 6 | |
| 30 Nov 2020 | £170K | £218K | £54K | 5 | |
| 30 Nov 2019 | £155K | £185K | £36K | 5 | |
| 30 Nov 2018 | £146K | £176K | £38K | ||
| 30 Nov 2017 | £157K | £201K | £51K | ||
| 30 Nov 2016 | £144K | £192K | £202K | £69K |
Where Smooth Air Ventilation Limited is registered
The registered office is in Glenrothes (KY7), in the Fife local authority area, Scotland. Show KY7 5NA on a map.
Other trade companies in KY7
- RWG Mechanical Services LtdInstallers
- Soldev LtdBuilders
- B&W Structural Services LtdInstallers
- Brown and Barrie Roofing LimitedRoofers
- JMD Corsa Sales LtdMotor traders
- Sullivan Surface Solutions LtdCleaning companies
- Groundworx Outdoor Services LtdLandscapers and gardeners
- Fife Aluminium and Metal Installations LtdJoiners and carpenters
Also registered at this address
3 other companies use the same registered office as Smooth Air Ventilation Limited.
- Bell & Buist Joiners LimitedJoiners and carpenters
- Kingdom Cladding LimitedInstallers
- Macgregor Ceramics LimitedFloor and wall tilers
What happens if Smooth Air Ventilation 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- SC224853
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 November 2001 (24 years ago)
- Registered office
- C/O Paterson Boyd & Co, 18 North Street, Glenrothes, Fife, KY7 5NA
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 1 November 2025
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Glenrothes
Other active specialist construction companies registered in Glenrothes.
- Summers Contracts Ltd2023
- B G Taylor Groundworks Limited2008
- Bisset Contracting Limited2011
- Bright Inspection Limited2011
- Chapman Lifting Services Limited2023
- Coast to Coast Disabled Services Ltd2005
- CW Welding Services Ltd.2009
- E.N.D. Hydraulics Ltd2023
All specialist construction companies in Glenrothes · All trades in Glenrothes · Specialist contractors across the UK
Frequently asked questions
When are Smooth Air Ventilation Limited's accounts due?
Smooth Air Ventilation Limited's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Smooth Air Ventilation Limited's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Smooth Air Ventilation Limited still trading?
Smooth Air Ventilation 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 Smooth Air Ventilation Limited do?
Smooth Air Ventilation Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Smooth Air Ventilation Limited?
Smooth Air Ventilation Limited was incorporated on 1 November 2001, 24 years ago.
What is the penalty if Smooth Air Ventilation 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 Smooth Air Ventilation 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.