What to take to a housewarming?

There is a company called Bloomin.co.uk they send gorgeous flowers delivered to your door.
How it works....
You agree to an amount you want to spend...
Then they contact recipient through a lovely card and ask how frequent they want to receive the flowers until the money is used up.
I had them every fortnight it was a lovely surprise to receive beautiful bouquets for 3 months.They are very good quality unusual flowers.

When my DD and SIL got their first home, I borrowed a line (or 2) from It's A Wonderful Life and took them a handy wicker basket with some salt, bread and wine:

"Bread - that this house may never know hunger.
Salt - that life may always have flavor.
Wine - that joy and prosperity may reign forever."

That was very well received. You could also throw in an envelope of money or a voucher for them to make a personal choice.

My son & gf have just bought their first house together & have found a beautiful hanging crystal with a house & key on it which they can hang in the window to catch the light.
Also found a fun present which is a cocktail making set lol

I know you said 'not a candle' but I recently bought a large Jo Malone scented candle as a house warming present it was in a glass container and the container was engraved with their new address. Looked lovely.

I know you said 'not a candle' but I recently bought a large Jo Malone scented candle as a house warming present it was in a glass container and the container was engraved with their new address. Looked lovely.

I know you said 'not a candle' but I recently bought a large Jo Malone scented candle as a house warming present it was in a glass container and the container was engraved with their new address. Looked lovely.

Personally, I'm not good with candles; the flames cause seizures and the smell makes me feel ill - so that would be out for me.
The idea of a small hamper is delightful. Can be biscuits, cheese, port/wine or jams [homemade or otherwise], other bits and pieces of that sort would be charming to receive. Plants for house/garden too - unless they [the plants] are very fussy.

A cheeseboard with the fancy little knives for cutting different cheese (if they "entertain")

Wooden chopping board(s), they're more hygenic than plastic

Le Cruset vouchers are ok but (I adore their pans/casseroles) they are heavy & wasted on any-one who isn't a serious about cooking

Choosing a gift depends on the couple's personality & how much they possess, are they combining 2 homes etc

I often give a picture frame as a 'house' gift

My son and daughter in law have just bought their first house and I've bought them a Dartington crystal decanter for a housewarming gift - it was a bit pricey, but they've been such a great support during the past few months that I wanted to get them something special. I also know that they will value the thought that went into buying them something I am certain they will like.

As it's your daughter why not ask her what she wants. My daughter moved house last week. She was going to buy new curtains so I said I would get them as a housewarming gift. As she had already spent money on moving she was very grateful

We've just moved to a new house and received a delightful house warming present. It's an OS map with our house located right in the centre. We're keen to walk and explore the area so are thrilled and will have it framed and out on the wall. Could just keep the paper copy as a resource though. Apparently these bespoke maps can be ordered from the Ordnance Survey people.

A cheese board and dome makes a nice present for someone who entertains a lot. Debenhams seem to have them without the board. John Lewis do them so I presume quite a few other department stores will.