Yep well worth getting a desktop FTTPoD quote from Cerberus or others. However to get an accurate FTTPoD price you may need to get a site survey done (£200+ cost) as one of my neighbours was quoted £17k (desktop survey price) for FTTPoD...despite being approx 20m away from the fibre DP used for my FTTPoD install in 2017. According to the Openreach bod who did my fibre CSP, a 2 port DP was installed so it should have a free port.
Out of interest, did they proceed, and if so, what did it cost?
I wouldn't have thought Openreach would connect a property to a DP which wasn't planned to serve it (otherwise that property would already be marked in the database as being able to take WBC FTTP). But with luck it wouldn't be very expensive to install another DP, and run a fibre cable back to the same splitter that serves the first DP.
To the OP: after you've got your free desktop quote, proceeding with FTTPoD will cost you £250+VAT up-front, and only then will you get your surveyed accurate costing, which you can accept within 30 days or decline (but if you decline, you lose the £250+VAT).
On top of the FTTPoD cost, there's also a hidden cost in that for the first 12 months you'll be paying a higher monthly rental: from Cerberus it's £100+VAT per month for 330/30, which is the only FTTPoD speed they sell.
After 12 months you can regrade to a standard 330/50 FTTP service from them, which will be cheaper, or a slower speed (cheaper again) - or change to a completely different ISP.