Start with what you actually want the home to do
Before you talk to architects or contractors, get clear on the problem you're trying to solve. A bigger kitchen? An extra bedroom? A home office that isn't a corner of the dining table? Bristol homes, particularly Victorian and Edwardian terraces in BS3, BS5 and BS6, usually have plenty of room to grow, but only if you start by knowing what room you actually need.
Get a feasibility view before you commit to fees
A short site visit with a design-and-build contractor is free and tells you whether your idea is realistic. Things we look at: structural constraints, drainage, party walls, rights of light, conservation status, and access for the actual build. About a third of first-visit briefs need adjusting, plus it's far cheaper to learn that on day one than three months in with architectural fees committed.
Decide the route: architect-then-builder or design-and-build
The traditional UK route is architect first, then put it out to tender to builders. It works, but it's slow, expensive in fees, and the contractor inherits a design they may not have shaped. Design-and-build means one contract from drawings to handover, one accountable team, and one fixed price after the design stage. For Bristol homeowners juggling work and family, design-and-build is usually the quieter option.
Plan for planning
Many Bristol extensions fall under permitted development, but conservation areas (Clifton, Cliftonwood, Redcliffe, Montpelier and parts of Hotwells) and listed buildings always need full planning. Allow six to twelve weeks for a planning application from submission. We handle the application, drawings and any neighbour consultations as part of our design stage.
Know what your build cost is actually buying
An extension price is not just bricks and labour. It includes structural engineering, glazing, kitchen integration, electrics, plumbing, insulation to current building regs, plastering, decoration, and snagging. We give a single fixed price after the design is signed off, so there are no mid-project surprises. Costs vary widely with size, glazing, foundation type and finish, every project is bespoke and quoted from scope.
Don't underestimate the build programme
A typical single-storey rear extension in Bristol runs twelve to sixteen weeks on site. Double-storey extensions run eighteen to twenty-four. Add six to twelve weeks of design and planning before site start. Anyone promising five weeks for a kitchen extension is either ignoring something or underpricing, both end the same way.
The handover that matters
A good handover isn't a hurried walk-through. It's a full snagging list, professional clean, certificates issued, building control sign-off, and an invitation back at three, six and twelve months. The 10-year workmanship guarantee starts the day you get the keys, not the day the contractor leaves the drive.