BuildPriceIQ
Log inSign up
  • 1,200+
    Verified builders
  • 18,000+
    Homeowners served
  • < 90s
    Avg. estimate time
  • 4hrs / week
    Average time saved on quoting
South East England

Build timeline in Brighton

Realistic week-by-week build timelines for renovations and extensions in Brighton, from first design meeting through snagging and final sign-off.

Local context — Brighton

Council
Brighton & Hove City Council
Open planning portal →
Cost premium
+6% vs UK average (South Coast labour premium + restricted access)
Typical extension price
A 25 m² single-storey rear extension in Brighton & Hove typically runs £60,000-£88,000 (standard to premium, 2026). Lower-ground-floor extensions in Regency squares (Kemptown, Hove) run £75,000-£120,000.
Building Control
Brighton & Hove Building Control is the council's in-house service; lead time 3-5 working days. Tight planning policy and 34 conservation areas push many homeowners to use private AIs for predictability.
Conservation & Article 4
Brighton & Hove has 34 conservation areas covering ~28% of the city — including all of Kemptown, Brunswick Town, Montpelier, Clifton Hill, Old Town and Preston Park. Article 4 directions are extensive; assume PD rights are removed in any pre-1939 street until confirmed otherwise.
Local quirks that move the price
Chalk subsoil across most of the city means foundations are usually shallow but always need an engineer's check for solution features. Coastal salt exposure south of the A259 requires 316-grade stainless fixings and pre-treated timber. Skip permits are heavily restricted in CPZ areas — expect £45-75/day plus suspension fees. Listed-building density in Kemptown means LBC is often needed even for internal works.
High-demand areas in Brighton
KemptownHovePreston ParkFivewaysHanover

Pre-construction (typical 10–16 weeks)

Architect or designer: 3–5 weeks for measured survey and concept drawings. Planning or PD route: 4–8 weeks. Structural engineer: 2–3 weeks. Building Control plans: 2 weeks. Builder tendering and contract: 2–4 weeks. This phase is where most overruns originate — start it before you commit to a builder start date.

On-site construction phases

Single-storey rear extension (25–35 m²): 10–14 weeks. Loft conversion (dormer): 8–12 weeks. Kitchen refit: 4–6 weeks. Full bathroom: 2–3 weeks. Whole-house refurb: 4–7 months. Add 2 weeks for snagging and final account.

Local factors that move the schedule in Brighton

Party-wall agreements (terraced and semi-detached homes in Brighton): allow 6–8 weeks. Material lead times for bi-fold doors and bespoke joinery: 8–12 weeks. Building Control inspections in South East England: book at least 3 working days ahead. Builder availability for autumn starts is tight — secure dates 4+ months ahead.

What "on time" actually means

Industry data: only ~30% of UK domestic projects finish on the original date. A realistic plan adds 15–20% buffer to the builder's headline duration. Lock dates with a Payment Schedule tied to stages, not weeks — that protects you when the timeline slips.

Get the Brighton build timeline checklist

Free PDF with the full build timeline checklist for Brighton homeowners — straight to your inbox.

FAQs about build timeline in Brighton

How long does a kitchen extension take from first meeting to moving back in?

Realistic end-to-end: 6–9 months. Design and planning: 3–4 months. Build: 3–4 months. Allow 2–3 weeks at the end for snagging, decoration touch-ups and final inspections.

When is the cheapest time of year to start a build in Brighton?

January–March is typically 5–8% cheaper as trades come off the autumn rush. October–December starts are the most expensive due to demand stacking before Christmas.

Can I live in the house during the build?

For rear extensions and loft conversions: usually yes, with dust sheets and a sealed-off zone. For full kitchen or whole-house refurbs: budget 4–8 weeks of alternative accommodation.

More Brighton guides

Planning permission in BrightonVetting builders in BrightonSave on renovation in Brighton

Build timeline in other UK cities

LondonCroydonEalingEnfieldBromleyBarnet

Ready to price your project?

Get a free, instant estimate tuned to Brighton (South East England) labour and material rates.

Start my free estimate

Disclaimer: This is an industry-informed estimate for guidance only. Build Price IQ (trading under Services R Us Ltd) accepts no liability for any decisions, costs, losses or damages arising from its use. Always verify with a site inspection and written quotes from qualified tradespeople before committing to work.