Master Builders in Cowley for House Extensions & Lofts
Delivering high-specification house extensions, bespoke loft conversions, and luxury period restorations across Cowley and Oxfordshire. Backed by FMB accreditation, fixed-price contracts, and a 10-year structural warranty.
Residential Extensions & Property Transformations in Cowley
Cowley and the vibrant East Oxford corridor—including Temple Cowley, Florence Park, and the roads adjoining Cowley Road—represent some of Oxford's most dynamic family housing stock. Characterised by Victorian and Edwardian red-brick terraces, inter-war semi-detached houses, and 1930s estates, these homes offer immense potential for modernisation. Under Oxford City Council planning frameworks, many single-storey rear extensions up to 6 metres on terraced and semi-detached homes can be executed under Prior Approval or standard Permitted Development. Crawford Construction delivers open-plan kitchen diners, L-shaped dormer conversions, and structural wall removals using precision RSJ steel beams.
Our Core Commitments
FMB-Listed Quality
Listed with the Federation of Master Builders, ensuring fully certified and vetted construction standards.
Fixed-Price Guarantee
Itemised, transparent quotes with fixed costs so you know exactly where your investment goes.
Personalized Management
A named project manager oversees your project from first site visit to final handover.
Our Building Services in Cowley
As a full-service construction company in Cowley and vetted Oxford building contractors, we manage everything under one roof—architectural design, planning permission, structural engineering calculations, and master craft construction across Oxfordshire.
Kitchen Extensions
Architectural open-plan kitchen diner extensions engineered for modern living.
Details
Period Property Renovation
Master architectural restoration and modern sympathetic refurbishment for Victorian & Edwardian homes.
DetailsHouse Renovations
Complete house renovations, structural alterations and turnkey property refurbishments across Oxford.
Details
Cotswold Stone & Modern Glass
Delivering architectural marvels across Oxfordshire with bespoke stone and glass extensions.
Why choose Crawford Construction
as your Cowley builder?
Itemised, Fixed-Price Quotes
You'll receive a written quote broken down line by line in plain English - not trade jargon. No vague provisional sums. If something changes, costs are agreed with you in writing beforehand.
Pay As Work Is Done
Staged payments tied strictly to completed milestones, never large sums upfront. A booking deposit secures your start date, with the balance spread across stages.
Accreditation You Can Verify
Listed with the Federation of Master Builders, TrustMark Approved, and fully backed by £10m public liability + employer's liability insurance for total peace of mind.
One Named Project Manager
From first site visit to final snagging - one point of contact who knows your project inside out: James Crawford, Project Director.
Local Knowledge That Saves Time
As established builders in Cowley, we know Oxford City Council's planning quirks and the specific conservation area rules in North Oxford, Jericho, and Headington.
A Guarantee We Stand Behind
Every project is backed by our 10-year workmanship guarantee, plus all manufacturer warranties on premium building materials.
Recent Crawford Builds
Modern Kitchen Extension
Listed Cotswold Restoration
Luxury Loft Conversion
Contemporary New Build
Bespoke Family Kitchen
A Process Built Around You
A clear five-stage journey, with you in control at every step.
Consultation
We meet on site to understand your vision, lifestyle and budget.
Planning
Feasibility, surveys, planning and building regulations handled in-house.
Design
Architect-led drawings, 3D visuals and detailed material specifications.
Construction
Skilled trades, fixed price, clear schedule, weekly progress updates.
Final Handover
Full walkthrough, warranties, aftercare and a beautifully finished home.
Trusted By Oxfordshire Homeowners
Rated 4.8/5 across verified independent client reviews and trade directories.
"Crawford took down our dividing ground-floor walls and built an awesome kitchen extension. Clear communication, transparent pricing, and zero surprises."
Proudly Serving All Of Oxfordshire
From the dreaming spires of Oxford to the rolling hills of the Cotswolds - local expertise across the county and surrounding shires.
Expert Builders in Cowley: Planning, Conservation & Architecture
Appointing accredited Oxford building contractors and an experienced builder in Cowley ensures seamless navigation of local planning controls, historic conservation bylaws, and Thames Water build-over standards.
Oxford Planning & Permitted Development
While many single-storey rear extensions in Oxford fall under Permitted Development rights (up to 6m for attached, 8m for detached properties), conservation areas and Article 4 Directions in Jericho, Headington, and Central Oxford frequently remove these rights. We prepare and submit complete planning drawings and Lawful Development Certificates directly to Oxford City Council.
Conservation Areas & Period Craftsmanship
From Victorian terraces on Magdalen and Divinity Road to substantial Edwardian villas in Summertown and North Oxford, our stonemasons and joiners specialize in authentic heritage compliance: matching Flemish brick bonds, breathable lime mortars, heritage timber sash glazing, and structural party wall agreements.
Fixed-Price Quotes & Cost Certainty
Single-storey extensions in Oxford typically range from £2,800 to £3,500/m², with bespoke loft conversions starting from £45,000. Unlike builders who quote low and inflate through variations, Crawford provides fully itemized, contractually fixed-price quotes backed by milestone staged payments.
Frequently Asked Questions About Builders in Cowley
Crawford Construction has completed 350+ projects across Cowley and Oxfordshire since 2003.
Some of our Clients & Partners
We collaborate with Oxfordshire's most respected academic colleges, historic private estates, and premium local property firms to deliver outstanding craftsmanship.
Let's build
somethingremarkable.
From first sketch to final handover — Oxfordshire's trusted team for homes built with precision, craftsmanship and care.
