North Cornwall · EX23 · Cornwall Council North
House extension costs in Bude — what EX23 homeowners actually pay
Most Bude cost questions land in the same bracket: a single-storey rear sits roughly £2,200–£2,800/m² built, a two-storey side runs £2,000–£2,500/m², and anything touching a coastal elevation tends to add 8–12% for materials and detailing. We quote on measured drawings, not guesses. Extensions are the bread and butter of Cornish homes — adding the kitchen-diner the original layout never had, the bedroom for a growing family, or the light and views the back of the house should always have had. Bude sits in North Cornwall, and that geography ends up in the drawings — Bude is the principal town of the far north coast, with a Victorian sea pool, broad surf beaches at Summerleaze and Crooklets, and a Conservation Area covering the canal and the older town centre, with a building stock that leans toward Edwardian villas and modern Persimmon-style estates.
Bude sits in North Cornwall — just off the A39; with Truro the closest city; covering EX23 from Stratton, Kilkhampton, Marhamchurch outward.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
- ✓ Typical Bude single-storey rear: £55k–£85k build cost
- ✓ Two-storey side extension: £85k–£140k build cost
- ✓ Wrap-around / L-shaped: £110k–£180k build cost
- ✓ Design + planning + building regs fee from £4,800 (fixed)
Local watch-list
The EX23 constraints that shape a extension brief.
Watch #1
Atlantic Zone 4 wind exposure driving render and fixing spec
Watch #2
Flood Zone 2 around the canal corridor
Watch #3
AONB long-view scrutiny for two-storey or sea-facing additions
Watch #4
Conservation Area Article 4 directions on central streets
Who this is for
In Bude the extension brief is almost always a private homeowner improving a forever home — so we lead with feasibility and long-term value, not show-home rhetoric.
Local context
Why Bude is its own job.
In Bude the planning picture is specific: conservation Area covers the canal, the seafront and parts of the town centre. AONB and Heritage Coast across most of the parish boundary. Edge-of-town residential growth is significant. For extension specifically, parts of Bude sit within a designated Conservation Area, which means materials, fenestration and roof pitches all need to read sympathetically with the existing streetscape; the surrounding landscape falls inside the Cornwall Area of Outstanding Natural Beauty, so massing, height and landscape impact carry extra weight in any planning decision; coastal salt-laden air around Bude drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. That local reading is what makes a Bude (EX23) project different from a generic Cornwall scheme — and is the whole reason we work this way. On Edwardian villas in particular — the kind you'll also find toward Marhamchurch — the extension brief always has to read the existing fabric first. Bude sits inside the Cornwall AONB and the North Cornwall Heritage Coast, so extensions facing the sea — particularly anything visible from the South West Coast Path or the canal corridor — get close landscape-impact scrutiny. Conservation Area boundaries through the canal, The Strand and parts of Belle Vue catch most pre-1960s properties; the post-war and Persimmon-era estates behind Stratton Road usually fall outside, which materially changes the planning route. Atlantic exposure also drives detailing: render specs, fixings and timber treatments here all need to be specified for a coastal Zone 4 wind load, not a sheltered inland site.
Planning note
Most extensions in Cornwall are either permitted development or a straightforward householder application — but Conservation Area and AONB sites need a more careful design conversation upfront.
What we focus on
Extensions considerations specific to Bude.
01
Bude EX23 addresses fall under Cornwall Council's North sub-area, so pre-application advice comes from the Bodmin office — slower turnaround than the Truro side, worth building into the programme.
02
Sea-facing extensions in Bude need wind-load uplift checks on roofs and Class 4 weather-tightness on windows; we specify accordingly rather than copying an inland detail.
03
Flood Zone 2 catches parts of the lower town near the canal and Summerleaze — a flood risk statement is often required even for modest rear extensions in those streets.
04
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
05
Permitted development for rear extensions runs to four metres on a detached house, three on a semi or terrace — but Article 4 areas remove this in some parishes.
06
Extensions over a certain proportion of the original house trigger full Part L upgrade obligations to the existing building — worth knowing before brief is set.
07
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
Recent work nearby
Recent Widemouth Bay rear extension specified A4 stainless throughout for the salt-laden boundary.
See more recent North Cornwall work →Our process
How a Bude extension project runs.
Step 1
Brief
We meet on site, talk through how you live now and what's missing from the current layout.
Step 2
Design
Two or three sketch directions with rough budgets, then refinement of the chosen route.
Step 3
Approvals
Planning or Cert of Lawfulness, then a full building regs package.
Step 4
Build
Either through your own builder with our drawings, or as a full build by our team.
Step 5
Handover
Snag, certify, hand over the keys to your new space.
Typical single-storey rear extensions run twelve to twenty weeks on site; two-storey and wraparound projects sixteen to thirty weeks.
FAQs
Bude Extensions — local questions answered.
- What's the average cost of a single-storey extension in Bude?
- For a typical 20–30m² rear extension in Bude (EX23) we'd expect £55k–£85k including VAT, depending on glazing spec and whether the kitchen is being reworked. Coastal exposure here pushes weather-tightness specs up, which is real money.
- Do extension costs in Bude include planning and building regs?
- Our fixed-fee design package covers measured survey, planning drawings, building regs and a tendered cost plan. Build cost is separate and quoted from drawings — never guessed from a phone call.
- What pushes a Bude extension over budget?
- Three things: ground conditions you didn't survey for, a planning condition that drives a material change, and "while we're at it" scope creep. We screen all three at feasibility stage so the number you start with is the number you finish on.
- Do extensions in Bude need extra planning consideration because of the AONB?
- Yes — Bude is inside the Cornwall AONB, so any extension visible in long views from the coast path, beaches or canal carries an extra landscape-impact test. Single-storey rear extensions tucked behind the existing house are usually fine; two-storey side or sea-facing additions need a more careful design conversation and often a Landscape and Visual Impact note.
- Are extensions in the Bude Conservation Area harder to get approved?
- Not harder, but more design-led. The Bude Canal, Strand and Belle Vue conservation zones expect render colours, sash proportions, slate or natural-slate-equivalent roofing and restrained glazing. Article 4 directions in parts of the centre remove some permitted development rights, so we always check the address before committing to a route.
- How do you handle coastal exposure on Bude extensions?
- We design to the actual EX23 wind and driving-rain exposure: stainless or A4 fixings, high-performance render systems, factory-finished timber or aluminium-clad windows, and roof detailing that copes with uplift. Costs a little more up-front but avoids the ten-year repaint and resealing cycle you see on standard inland specs.
Bude is the hub for these neighbourhoods
We run extensions across Bude and the surrounding EX23 neighbourhoods — same studio, same site team.
- Stratton
EX23
- Poughill
EX23
- Flexbury
EX23
- Widemouth Bay
EX23
- Marhamchurch
EX23
- Kilkhampton
EX23
- Morwenstow
EX23
- Shop
EX23
- Coombe Valley
EX23
Local proof — Most Bude extension clients we work with are second-time builders — they've seen the templated approach fail once already.
Get a free feasibility viewOther services in Bude
If you're scoping an extension in Bude, the honest number depends on three things: ground conditions, finish level and how much of the existing fabric stays. We'll tell you which bracket you're in before you commit to a fee.