A Ong Limited
Window & double glazing company registered in London, Greater London
- Registered name
- A Ong Limited
- Address
- 25 PENTLAND STREET, London SW18 2AW
- Town
- London
- County
- Greater London
- Companies House
- 08169455 · filing history
- Incorporated
- August 2012 — 14 years on the register
- Company type
- Private Limited Company
- Trade (SIC)
- Joinery installation (windows, doors & frames) (43320)
- Also registered for
- 43390 - Other building completion and finishing
- Accounts on file
- Micro-entity accounts (smallest filing band) · last filed August 2025 · next due May 2027
Listed from the public Companies House register, not an endorsement. Quote requests go to FENSA or Certass registered installers covering your postcode, not necessarily this company. Accounts filing category reflects company size under Companies House rules, not service quality.
Before you book A Ong Limited
This page confirms the company is on the Companies House register. It does not confirm FENSA or Certass registration, insurance, or trading status — check those yourself first.
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Is A Ong Limited FENSA or Certass registered?
This directory does not confirm registration. Window and door installers self-certify their work against Building Regulations through a Competent Person Scheme — mainly FENSA or Certass — so check the company name or postcode (SW18 2AW) directly on the FENSA or Certass website before booking, and ask to see the certificate number.
How do I get a quote from a window installer in London?
Use the "Get Free Quotes" form on this page. Your job details go to FENSA or Certass registered installers covering the SW postcode area, who contact you directly. London has 1,582 registered window and glazing businesses in this directory, though the installers who quote are not necessarily among them. It is free and there is no obligation.
Do uPVC windows need any maintenance?
Not much, but not none. Wipe the frames a few times a year, lubricate hinges and locks annually, and keep the drainage channels along the bottom of the frame clear so water can't pool and find its way inside. There is no statutory annual service like a boiler needs.
Does a listing here mean A Ong Limited is recommended?
No. Companies appear in this directory because they are on the Companies House register under a window/joinery installation trade code. A listing is not vetting, endorsement, or a guarantee that the company is trading or FENSA/Certass registered.