Free consultation
We assess the space and how you want it to be used.
Loft, garage, basement, barn or outbuilding — if a space exists but isn't working for you, we can usually convert it. One team handles the design, planning and structural sign-off, whatever the conversion.
Dormer, hip-to-gable or roof light — the most common way to add a full extra bedroom or office.
Turn an unused garage into a snug, gym, playroom or self-contained annexe.
Dig down or convert an existing cellar into a full storey of extra living space.
Convert a barn, stable or outbuilding into residential or commercial use, class Q and full applications.
Studio, office or gym at the bottom of the garden, insulated and built for year-round use.
Change of use above or behind commercial premises into flats or living accommodation.
Convert redundant office floors into apartments under prior approval or full planning.
Self-contained accommodation for family or rental income, designed to meet local policy.
Every conversion is designed, approved and structurally signed off by one team.
Whatever space you're converting, the process is the same — a measured survey, drawings that respond to the space, a planning route confirmed upfront, and structural calculations coordinated with the design so nothing gets lost between separate consultants.
The existing space measured on site, including headroom, access and existing structure.
Practical layouts that account for headroom, stairs, light and access from day one.
Permitted development, prior approval or full application — confirmed before drawings begin.
Beams, floors and foundations calculated and coordinated with the architectural design.
Full package prepared and submitted, ready for your builder to start work on site.
We assess the space and how you want it to be used.
Existing structure, headroom and access measured on site.
Layout and elevation drawings shared for your feedback, then revised.
Planning route confirmed and structural calculations prepared.
Most projects need more than one discipline — design, approval, structure and compliance all working together. Here's the full range, so you can see how each piece connects to the next.
Concept through to detailed drawings for any residential or commercial project.
02Applications prepared, submitted and managed with your local council.
03Beam, wall and foundation calculations coordinated with your design.
04Notices, awards and neighbour liaison under the Party Wall etc. Act 1996.
05Rear, side and wraparound extensions designed around how you'll use the space.
06Compliant room layouts, licensing and fire safety for multi-let properties.
Loft, garage, basement, barn and change-of-use conversions of every kind.
Escape strategies and fire compartmentation for conversions and multi-let buildings.
Quick answers to what clients ask us most before converting.
Not always. Many loft, garage and internal conversions fall under permitted development. Barn conversions, change of use and anything altering the external appearance usually needs prior approval or a full application — we confirm the right route first.
Pricing depends entirely on the space, scope and structural work involved. Send us the property details and what you're looking to convert, and we'll come back with a clear quote — no obligation.
Almost always, even where planning permission isn't needed. Structural work, insulation, fire safety and means of escape all fall under Building Control, and we prepare that package as part of every conversion.
Yes — commercial-to-residential and other change-of-use projects go through us in the same way, with the added step of confirming the correct use class and any prior approval route before design starts.
Concept drawings are typically ready within 5–10 business days. We'll confirm an exact timeline for design, planning and structural sign-off once we've reviewed your project.
Send the property address and what you'd like to convert to agent@xpanza.co.uk, and we'll come back with a clear quote — no obligation.