I've a small house and if managed properly you will notice that the house does look bigger. So, to answer this question I'm going to share some of the points I did follow to organize my house in such a manner that it started looking bigger.
Step 1. Foremost get rid of the clutter. Yes, please get rid of the things you are not using i.e they are lying ideal. It, could be any broken stuff so just get rid of that first.
Step 2. Most of the space in house is used by furniture. So, see if you can get compact or a fold-able furniture. There are great innovative products in market. Check on amazon and other websites which are selling furniture - try getting furniture which is compact, and durable.
Step 3. Make use of your balcony efficiently. I've, a 1 bed room apartment with one balcony. So, with help of an interior designer I converted this balcony to a study cum balcony sort of a room. It, servers the purpose of an balcony and at the same time as a place to sit and read in an open space.
Step 4. Re-design your kitchen with latest interiors. This, could be expensive thing but believe me re-designing your kitchen with the latest designs available in the market is gonna save you a lot of space that can be used for some other purpose i.e. putting in your dinning table there.
Step 5. Eliminate extra cupboards from your bedroom. At times are bed room is stuffed with extra cupboard just have one of them and your bedroom should look bigger.
These were some tips that should help in making a house look bigger.