I am a bit reluctant to write this because, selfishly, I want to make sure we can get a room again in the future, but I have to thank Margaret for her excellent hospitality and for helping make my 50th a very special occasion. The house is in a lovely square literally a stone's throw from Harrods and is very easy to get anywhere in London either by bus or train. We had the top floor with a room for our adult son and a larger double overlooking the square for ourselves. The room was beautifully decorated, very comfortable and the bathroom was excellent. It would be hard to find anywhere as well appointed that had such lovely rooms and delicious breakfast - one of the nicest we have had in a bed and breakfast (and we've had a few!) at such a good price. We will definitely be back - if we can get in!!

You can save some money if you take the Piccadilly Line from Heathrow (about $3 U.S. when we went) and can get off a block away at Harrods then walk to 37 Trevor Square. It was a clean, safe, and quit neighborhood. We could walk about a block and take the "TUBE" or bus anywhere we wanted to go in London. The best part was we felt kind of like we "lived" in London for the week, rather than feeling like we just "stayed" in London.
PS - the friendly (yet not overbearing) owner makes a great breakfast to get you going everyday.

I was checking out "the Best of 2010" and was surprised to see 37 Trevor Square so far down the list - but then if you are small it is very hard to get the numbers of reviews that you need to make the top 10.But Trevor Sq should be there - everything about it is superb.Margaret is a wonderful host,the location is superb and the decor is exactly what you'd expect from a top London decorator -(which Margaret is).
We keep trying to return but you have to book well ahead - if you want to stay just around the corner from Harrods then don't wait - book now - it's magic

Great b&b with a charming host in Margaret.

Stayed here for two nights in September. Very comfortable well appointed room in a very nice property.

Quiet and private but minutes from both Kensington and Knightsbridge.

Highly recommended.