Home refurbishment financing

PaulS1981

Just looking for some advice
I currently own a property which is valued by Halifax at around £270k. I recently extended my mortgage to take £60k of additional borrowing (mortgage is now £216k) to fund some renovations and improvements. In the process of looking into this I have involved an architech to see if we can extend and change the layout of the property (gave her an approximate figure of £60k to work with). She has finally after a few iterations come back with a layout we like and submitted to her usual builder for some costing. The builder has said he thinks the changes would be approximately £150k, which obviously is well in excess of the initial budget.
I am looking at all options (including doing nothing), but would be interested to know what others might have done to fund a project like this. Affordability isnt really an issue, my partner and I have an income of around £4.5k per month with no debt. We have close to 100k of the budget in cash but would need around another £50-60k to go ahead with the project. 
Any advise would be gratefully accepted

darrend2812

I'm in the same similar position, albeit looking to borrow much less. I've gone down the route of a personal loan ; a comparison site and reviewed my options from this.