Refused applications can be appealed within 6 months of the decision, or 3 months for householder appeals. Appealing is a complicated process taking several months, which is why appealing repeatedly is never advisable. Reapplying with amended plans that factor in planning officer feedback is an easier route to getting planning permission.
Oftentimes, developers find themselves applying over and over again and amending the plans according to the feedback received each time to eventually find themselves getting an acceptance from their local planning authority (LPA). However, if this approach doesn’t work and/or if you feel the refusal is unreasonable – or if the LPA has taken longer than the required 8 or 13 weeks to issue the decision (unless a longer time frame has been previously agreed) – then you can appeal to the Secretary of State.