If you need a larger place in London, I honestly don't know how you do better than this.
My family and I stayed here (two adults, two teens) for two months in the Summer of '21, including multiple quarantine periods as each person joined us.
Immaculately clean, three proper bedrooms and two big baths, lovely modern design and a peaceful back yard. We found Chiswick to be a lovely, calm, leafy break from hectic London days, and you're in Piccadilly in 45 minutes if you want (10 minutes to Turnham Green Tube, about 30 from there). The Chiswick high street itself is also charming.
(I had to commute by car to the west, which was easy to access and parking wasn't an issue, so this is a great base to explore greater England from as well).
Rachel is a thoughtful host, met me at check in, gave me a thorough orientation, and we touched base multiple times during our stay just to see how it was going.
Very very happy we chose to stay here.