Moving in together

Do you keep your house immaculate, or are you more laid back? If more relaxed, that could be a source of tension.

It depends on where you're moving into and what your relationship is like at the moment e.g. if you only see each other on "dates" then I'd be concerned about some of the things that @DPotter mentions but if you're used to seeing each other on a more mundane day-to-day basis (I do dinner & tv evening after work 2-3 times a week with my bf when there's always stuff like bins to put out and laundry to do) then i think you have a better idea of what you're letting yourself in for.
It would also depend on the housing arrangements for moving in given that you've got property and he rents. Are you planning to buy together, move into one of the properties, how are you going to protect yourself if you were to split up and haven't got your own home still??
And I would want a very firm agreement over arrangements for the teenagers i.e. that you are not financially responsible for them (in choosing a house this should mean he pays the difference in cost due to the number of extra bedrooms you'll need), food bills etc or generally being their chauffeur and household assistant.

Just what I was thinking!
OP, what is his place like? Is it clean and tidy? Is there a reason he rents?
My ex expected me to do all the cleaning and tidying as I owned the house, he paid rent and I'd "have to do it all anyway" if he wasn't there

He wants to move himself and his two teenagers into your house when you two haven't even spent a weekend together.

There's a word for that. In fact, there's a lot of words for that.

Check out some of the stepparent threads too.

Hun, just no.

Absolutely not - surely you've heard about single dads looking for home owning women 'to move in with' nothing more attractive than someone who owns their own home ....
Open your eyes ... carry on 'dating' and consider living together when/if the DC have completely left home.
And ask him honestly ... why is he is so keen to move in together?

Sorry, almost a cliche. Man who rents moves into single woman’s home, thus saving himself rent, plus having someone to cook, clean, looking after dc etc (I’ve been on mn too long!).

Hell no.

Given your last update - definitely No

I don't think it's that important to go on holiday together before moving in because holidays aren't "normal" circumstances. But getting up and going to work, seeing if someone tidies up after themselves consistently, what someone does to unwind etc. are the things you will need to deal with daily, rather than spending 24/7 together in a hotel room which gets cleaned by someone else.

I wouldn't move in unless we'd spent several days together both at the weekend and during the week with our normal routine. I made the mistake of moving in with someone I hadn't spent big chunks of time with and it was a disaster, only lasted two months before I asked him to leave

His house?? Your house??

I have no interest in living (part-time or full-time) with anyone else's kids, so no thanks.

How much time have you spent by with his child?

Let me guess, he rents and you own a house.

I think a holiday would be a good idea.

you also haven’t spent a weekend with his children. They need to be ready to move in with you as well. It’s been 18 months, how much time have they spent with you?

unless they are at the point where you are visiting their house and they start finding it ridiculous that you return to your own home, it’s too soon to move in.

No, No, No and for the avoidance of any doubt - No.

2 glaring reasons
You haven't even spent a weekend together let alone a fortnights holiday. You have no idea if he picks his feet, leaves the kitchen bin to fester, lives off brawn sandwiches when not with you, showers each day

He has teenage kids - so the dynamic will be completely different than if it was just the 2 of you. You'll be getting to live with 3 + new people. He will only be getting to live with one new person.

Am I right in thinking you don't spend time with DP AND his teenagers ? Lets be honest - has he asked what his teenagers think of the idea ? It's only fair to ask, as they will be sharing their space with someone they barely know.

To answer your original question, no, I wouldn't.

As others have said, why does he want to live together? Who benefits? Do you want to effectively become a 'step mum' to his DC every weekend? What ages are the DC? Who would be moving where? And importantly, would you be giving up any security/house etc?

If he has his DC at weekends do you spend weekdays/nights together?

It feels as if there are several more steps before you even think about moving in together - holidays, spending weekends together, having some long conversations about how it might work.

Hell no. What percentage of costs and responsibility does he envisage you taking on?

My husband and I never spent the night together until our wedding. We moved into our home together the day after.

Also who's moving where? Him and his DC into yours?
Who benefits the most out of this potential arrangement? Where does he live now? Have you talked about bills?