Domestic Frequently Asked Questions
Planning permission typically lasts for three years from the date it is granted. You must start the development (usually by commencing material operations on site) within this period, or the permission will expire. In some cases an extension of time can be applied for before expiry, we can advise and assist with this if needed.
Yes, detailed building construction drawings (also called working drawings or construction drawings) are essential for most home extensions and conversions. They ensure the build is structurally sound, meets building regulations, provides accurate information for builders and trades, and helps avoid costly on-site mistakes. PDK provides a full set as standard in our design packages.
The full timeline for a dormer loft conversion or similar project varies depending on complexity, size and whether planning permission is required. Typically: design and approvals take 2–6 months; construction itself usually lasts 8–14 weeks for a standard dormer or hip-to-gable loft. We provide realistic programmes at the outset and can coordinate the process to keep things moving smoothly.
A home extension adds new living space to your property, commonly single-storey rear extensions, two-storey side extensions, or infill extensions. It increases floor area, improves layout and often boosts property value, all while staying within your existing plot.
Key factors include the size and type of extension, ground conditions (e.g. foundations), structural changes, glazing/roofing choices, internal fit-out level, and whether planning or party wall agreements are needed. We design with cost-effectiveness in mind to deliver maximum value.
We focus on: bungalow extension designs (often single-storey with flat or pitched roofs), dormer loft conversions, hip-to-gable lofts, rear extensions (open-plan kitchens, living areas), side extensions, garage conversions, and full house remodelling. Our team recommends the best option after a thorough survey of your home.
Many extensions fall under permitted development rights (no planning needed), especially single-storey rear extensions up to certain depths and heights. However, larger projects, dormers, two-storey extensions, or homes in conservation areas/listed buildings usually require approval. We handle all assessments, drawings and submissions for you.
Yes, professional architectural drawings are vital for building regulations approval, structural safety, accurate builder pricing, and planning permission (where required). PDK delivers comprehensive packages from initial surveys through to detailed construction drawings.
Absolutely. A dormer loft conversion is one of the most popular ways to add significant headroom and usable floor space. We design flat-roof, pitched-roof or L-shaped dormers tailored to your roof shape, property style and local planning rules, ensuring light, comfort and full compliance.