Vastu is the science of direction that combines all the five elements of nature and balance them with the man and the material. Vastu Peace is creating a congenial settings or a place to live or work, in most scientific way taking advantages of the benefits bestowed by the five elements called "Paanchbhootas" of the nature thereby paving the way for enhanced health, wealth, prosperity and happiness in an enlightened environment.

Our sages and seers have knew the secrets of using all the five elements of this universe and their special characteristics and influences such as the magnetic field, gravitational effect etc. of Earth, the galaxy in the sky, the directions and velocity of the winds, light and heat of the SUN including the effects of its Ultra-Violet and Infra-Red rays, the volume and intensity of rainfall etc. for the advantage of the mankind in suitably planning and constructing buildings for dwelling, prayer, entertainment , education , working , production and other purposes . They evolved scientific methods and systems and confined them over the years as 'VAASTU SHASTRA'.

Vastu is not basically about entering into a house and telling about what's not right there.
A consultant can help you.. Only what you ask for -:

Technically It requires plan of house/shop/building/society at first place with directions and

Most importantly..
lssues you are facing and
Issues you want to resolve. (that's the real thing)

It doesn't require your faith in vastu, but yes your faith in consultant is must.
If you are thinking of Vastu or having doubt in mind then it surely works for you