Hi Soup and welcome to "the family".
A haunting can happen for many reasons, if indeed this is what you are experiencing (I say if as all natural explanations must be ruled out before we can consider anything paranormal), and not necessarily related to the land, property, etc.
As an example, my group has just recently completed an investigation in Creswell (here in the UK) for a family experiencing weird things in their home. We identified three grounded entities at the property, which like yours, is quite a new build. Two of these (Michael and Richard) had been drawn to the home through "familiar energies" relating to the property owners, who had never experienced anything before moving to this particular property. The third (Stephen) was related to an incident within the local area back in the 1950s and had grounded to the property because of "activities" between the owners at the home.
How you act - your lifestyle and your activities - can draw entities in unintentionally and have no other connection to anything else other than this.
I am always dubious about getting the Church involved in any case until what is actually going on can be confirmed. This is because intervention by the Church can sometimes make things worse, or at the very least, increase the activity being experienced. Do you have any local Paranormal Groups that could come in and do an investigation on your behalf prior to getting the Church involved? A reputable group will not charge you anything for doing this and may be able to give you some answers or even help anything "lingering" to cross over and be at peace (as we did in the Creswell case).
Any case of a potential haunting can be time-consuming - gathering evidence, identifying what can be explained naturally and what cannot, investigating further non-natural explanations and getting answers, as well as defining any actions to deal with the activity noted (cleansing, blessings, Church intervention, etc).
Although unexplained activity can be quite frightening, keep a positive energy maintained around the home; as already mentioned, do not try to communicate with any potential entity other than to lay down rules in open, general discussion (do not try to ascertain who they are, why they are there, how they got there, etc - leave that to experienced investigators who (hopefully!) know what they are doing) - the living control their home, not anything else.