As GG says, I'm just down the road from there. Woolverstone Hall School (which is what the place actually is, even though it also serves as a wedding venue) is just under 6 miles from Ipswich. So you've got all of the accommodation in the town available to you (and there's LOTS of it these days!).
As Naomi points out, the Ipswich South Premier Inn is fairly close by, being just 4 miles from Woolverstone Hall:
https://www.premierinn.com/gb/en/hotels/england/suffolk/ipswich/ipswich-south.html
If you'd prefer to be closer to central Ipswich, which is a town well worth exploring these days, the Quayside Premier Inn might be a better option. (It's right by Ipswich Waterfront, which is a very attractive area, with lots of bars and restaurants. It's also just a few minutes walk into the heart of the town):
https://www.premierinn.com/gb/en/hotels/england/suffolk/ipswich/ipswich-town-centre-quayside.html
The Novotel is similarly well-situated for both the Waterfront and the town centre:
https://all.accor.com/hotel/0995/index.en.shtml
For budget accommodation, there's an easyHotel right in the centre of Ipswich:
https://www.easyhotel.com/hotels/united-kingdom/ipswich/ipswich-town-centre
If you'll be travelling by train, the Pentahotel is close to the station and within reasonable walking distance of both the town centre and the Waterfront:
https://www.pentahotels.com/hotels/united-kingdom/ipswich
For a taxi between Woolverstone Hall and Ipswich, I recommend Avenue Taxis (01473 888 888), which can be booked online
https://www.avenue-taxis.co.uk/
or Hawk Express (01473 222 222), which can also be booked online and might possibly be somewhat cheaper:
http://ipswichcabs289.co.uk/
There's lots more information on the town's website:
https://allaboutipswich.com/