Updated: May 20, 2020
If you asking this question then something is happening. Whether it be as simple as that you're becoming more sensitive to energy. Or physical phenomena has/is occurring in the space.
When determining if a location is holding energy the first objective is to ascertained the energy source. Most common is a love one in spirit. Other energy sources manifest through thoughts and emotions known as Jinns. Alternatively, energy maybe attached to the location i.e. previous homeowner. Lastly, energy with no association to occupants or location.
Once the energy type has been ascertained the next step is to determined is the why the energy is present. Energy cannot be cleared, transmitted with lasting results without understanding the "why". Your love one in spirit, may be present to help during a difficult situation. Alternatively, energy connected to the location due to history may have unresolved trauma's that need to be resolved. Jinns form when a space is exposed to lower frequency energy like negative thoughts and action. Therefore for lasting results we need to consider the behaviours of the whose occupying the space. So, before we assume our home is haunted lets identify the WHY things are happening.
Love ones in Spirit pop in to support, as required. Once they're no longer needed they'll move on. Coming back to visit when and if required.....just like they would before passing. Energy manifested through negative thoughts, action and vibrations is easily transmuted and transmitted (cleared) using traditional indigenous clearing methods like smoke clearing with white sage & prayers. Alternatively, it can be cleared with quantum energy practices. That being said, clearing this energy form is only effective for current energy. New low frequency energy will form again if the people occupying the space repeat the behaviours that originally manifested the energy. To resolve long term occupants need to consider how to heal which in-turn changes behaviour.
Once these common energies have been ruled out we can explore the history of the location or if a different situation is occurring. When resolving the issue of a previous owner connected to the property a medium would ascertain through connection and communication with spirit "why" they are still connected to the location. Then work with the Spirit to facilitate transition from this world to the next.
Lastly, a specialist medium or parapsychologist would be required to resolve energy in a space with no previous connection. As it can be a little more complex to transmute and parapsychology protocols should be followed. In these cases professional energetic clearing may be required.