Coastal Location by house wall for Birch?

My front house garden is v small, measuring about 14ft deep by 25ft wide. The location is within 4-500 metres of the sea with no screen in between. The builder planted birch trees in some gardens ( in the housing development interior) which are even smaller than mine, so the trees are within 5-10ft of the house walls.With such a small area and a difficult coastal location it is difficult to find a small tree with an upright habit, that can also cope with strong salty winds. The white birch Betula Jacquemontii Jermyns is planted about 6ft from my house wall and is coping well with the coastal location. But is it too close to the house where roots could cause damage? I would like to retain the tree if possible.