Heighten vs. double

[Malaga]

Test No. incompl/inter-3 "If you tend to forget", question 6

If you had bought a house about thirty years ago you would certainly find that it had considerably ......... in value.

(a) increased
(b) heightened
(c) developed
(d) doubled

Test No. incompl/inter-3 "If you tend to forget", answer 6

If you had bought a house about thirty years ago you would certainly find that it had considerably increased in value.

Correct answer: (a) increased

Your answer was: incorrect
If you had bought a house about thirty years ago you would certainly find that it had considerably doubled in value.
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i would like to know why here we couldnt use the word 'heighten' or 'double'. is it a fixed expression?

Thank you in advance.

[Mister Micawber]

.
Doubled would work if it weren't preceded by the adverb considerably.

Doubled is non-gradable-- a value cannot be very doubled or a little doubled.

Heightened does not work because it does not collocate well with value here as the worth of a property-- though we do use it in non-monetary senses: Keeping track of industry practices may be of heightened value to you.
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Native English teacher at Mister Micawber's