You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Newcastle_upon_Tyne

Context:
The Tyneside flat was the dominant housing form constructed at the time when the industrial centres on Tyneside were growing most rapidly. They can still be found in areas such as South Heaton in Newcastle but once dominated the streetscape on both sides of the Tyne. Tyneside flats were built as terraces, one of each pair of doors led to an upstairs flat while the other led into the ground-floor flat, each of two or three rooms. A new development in the Ouseburn valley has recreated them; Architects Cany Ash and Robert Sakula were attracted by the possibilities of high density without building high and getting rid of common areas.

Question:
What can be achieved without building high or getting rid of common areas?

high density