Let's say we want to predict house prices and have the following 3 features with their possible categorical values:
Slope of land property: 1) Gentle 2) Moderate 3) Severe
Type of utilities available: 1) All public Utilities 2) Electricity, Gas, and Water 3) Electricity and Gas
Style of dwelling: 1) 1s - One story 2) 1.5s - One and one-half story 3) 2s - Two story
Would it be acceptable/advantages to turn all those values into 1,2,3 integers (numerical data)? On the one hand it makes sense since e.g. 1s building is worse than 1.5s building which is worse than 2s building. On the other hand it's possible that the gap between 1s and 1.5s is much bigger than between 1.5s and 2s. How common/uncommon is this practice?