There are multiple reasons to hire interior designers .
"HIRE and LEAVE it to experts to design your space "
a) Professional Touch  : Professional interior designers work far beyond on aesthetics to fullfill the project goals . Starting from the scratch they will focus on each and every minute thing which can help a beautiful outcome .
b) Professional experience : Based on years of experience , its not just the view of colors , but they are trained enough to visualize your space and come up with the best possible design which can fit in the space . If people opt for quality interiors , it is always suggested to go with a professional rather than selecting items which don't fit in the scale , harmony and usability .
c) Material Knowledge : Wide knowledge of materials which are in vogue and can work out well at your space .

In today's living , every space of your apartment counts .  If your house is big , you have the luxury of space to decorate it in a different ways but when space is a constraint , we have to employ some ideas to do so . 
First option is " USE OF MIRRORS " , this can be done in many ways . As mirrors creates an illusion increasing the space of your room . They also become a good source of reflecting natural light that enters room which makes it spacious despite its design . Mirrors can also be used on shutters of storage units . 
Second Option is " USE OF UNITS WITH MULTIPLE USABILITY "  , this can happen when a single unit can work in multiple ways , for example , creating separate TV unit , dressing and study would eat up space where as designing a unit in such a way which can solve the purpose of all three would give more space .
 Third option is " USE OF PAINTS AND WALL DECORS " , to make the room interiors look cozy and spacious , we should use proper color which decorates it in different ways . Like using lighter shade colors , wallpapers with minimum textures , avoid using dense textured wallpapers or texture paint .