It really depends on the finish you choose.
We totally re-decorated our house earlier this year and the following cost us around €30k:
- Laminate flooring throughout downstairs
- Carpet on the stairs and 4 bedrooms
- En-suite and the main bathroom tiled
- New shower tray, sink and shower door for the en-suite, shower screen for the main bathroom
- New bed, two night stands and a tall chest of drawers, large sofa, coffee table, dining table with 8 chairs
- New kitchen with all new appliances
- Wooden blinds throughout
- Whole house re-painted (interior, eaves, window sills, garden shed, side gate,.... plus all woorwork on th inside)
- Some soft furnishings (curtains for five windows, rugs for the living room an the dining area,...)
- Bathroom mirrors and other bits and bobs
- A few new light fittings
Now, I wouldn't know exactly how much we spent but but the ball park is right. I found it that he highest tag went to labour - tiler, plumber, paintors, kitchen installers, etc. If you can and are willing to do a lot of work yourself, you'll save a lot.
When it comes to buying things, don't forget to shop around. I haven't paid a full price for anything by simply getting several quotes for everything, buying furniture and curtains on January sale, as well as buying a lot of bits and bobs in cheaper shops. For example, I got towel rail, toilet brush, etc for the downstairs toilet in Heatons where they cost only a fraction of what they'd cost anywhere else. Harry Corry have fantastic curtains and bedding at really good prices. Home Store & More have fantastic deals on pots and pans and all sorts of kitchen stuff. Our furniture is from Harvey Norman's and we haven't got a single complaint about it plus it was delivered the same week (with an exception of sofa which took longer). Carpet Right have really nice rugs and if you're lucky (as I was) to find end-of-life design you like in the right size, you can pick it up for next to nothing.