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Extensions / Refurbishments / New Builds

Trusted Builders in Oxford for Extensions, Renovations and New Homes

Oxford builders delivering extensions, loft conversions, refurbishments and new build homes across Oxfordshire. From the consultation and planning stage through to final handover, we manage every stage so you don't have to. We provide clear communication, transparent pricing, and a dedicated team on-site every day.

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Clear pricing, first-class workmanship, and a team that shows up every day and delivers - DKM Builders get it right from start to finish.

Serving Oxfordshire since 2010

Featured Project

Single Storey Extension

OX2 8LW

about DKM Builders

Design & Build Specialists
for High-End Homes in Oxfordshire

Clarity

Control

Accountability

At DKM Builders, we specialise in delivering quality residential projects across Oxfordshire. We provide expert guidance from the earliest stages to help you navigate planning permission with clearly established budgets, before construction work begins.

We offer a full ‘design and build’ service that manages your project from concept through to completion. Whether you have a clear vision or are just starting to explore your options, our team can support you with architectural drawings, structural engineering, and provide full construction of your project.

Our goal is to deliver exceptional results with complete transparency and accountability.

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our services

Our Design and Build Services

Principal Contractor & Construction Management

Principal Contractor & Construction Management

Full responsibility for programme delivery, subcontractor coordination, cost control, quality assurance and health & safety compliance from commencement to handover.

Principal Contractor Services

Design & Build Management

Design & Build Management

Single-point responsibility for managing design development and construction under one coordinated programme, with integrated cost and delivery oversight.

Design and Build Services

High-Value Extensions

High-Value Extensions

Structural extensions incorporating steelwork, complex detailing and seamless integration with existing properties to create long-term value.

Home Extensions

Loft conversions

Loft conversions

Structural roof reconfiguration, dormer construction and full regulatory compliance to deliver high-quality additional living space.

Loft Conversions

New Build Homes

New Build Homes

End-to-end residential construction from groundworks through to completion, including consultant coordination and full project management.

New Build Homes

Full Refurbishments

Full Refurbishments

Comprehensive strip-out, structural reconfiguration and services upgrades delivered with high-spec internal finishes and controlled programme management.

Refurbishments and Renovations

Principal Contractor & Construction Management

Principal Contractor & Construction Management

Full responsibility for programme delivery, subcontractor coordination, cost control, quality assurance and health & safety compliance from commencement to handover.

Principal Contractor Services

Design & Build Management

Design & Build Management

Single-point responsibility for managing design development and construction under one coordinated programme, with integrated cost and delivery oversight.

Design and Build Services

High-Value Extensions

High-Value Extensions

Structural extensions incorporating steelwork, complex detailing and seamless integration with existing properties to create long-term value.

Loft conversions

Loft conversions

Structural roof reconfiguration, dormer construction and full regulatory compliance to deliver high-quality additional living space.

Loft Conversions

New Build Homes

New Build Homes

End-to-end residential construction from groundworks through to completion, including consultant coordination and full project management.

New Build Homes

Full Refurbishments

Full Refurbishments

Comprehensive strip-out, structural reconfiguration and services upgrades delivered with high-spec internal finishes and controlled programme management.

Refurbishments and Renovations

Double-Storey Extension, Loft Conversion & Full Refurbishment in Oxford

Full House Renovation, Cowley, Oxford

OX4 2QD

A full house renovation incorporating a loft conversion and double storey extension.

Single-Storey Rear Extension & Landscaping in Oxford

Extensions Design and Construction, Cutteslowe, Oxford

OX2 8LW

This project involved the design and construction of a single-storey rear extension to a detached family home.

Extension, Full Refurbishment & Landscaping with Summer House in Oxford

Full House Refurbishment, Cowley, Oxford

OX4 2QD

A full house refurbishment of the property incorporating a summerhouse addition and extension works.

Oxford Full Refurbishment & Double Storey Extension

Full Refurbishment & Double Storey Extension, Oxford

OX4 6EQ

This project involved the complete transformation of a dated Oxford property into a modern, design-led family home.

our projects

Quality Building Projects Completed Across Oxfordshire

Our portfolio showcases a selection of projects our team delivered with professionalism, precision, and control. From complex refurbishments to large-scale renovations and extensions, every project reflects our commitment to quality construction and structured delivery.

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our process

How Our Build and Design Service Works

We guide you through every stage of your project, ensuring a high-quality result and a smooth experience.

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01

Initial Consultation & Feasibility

We visit your site, understand your goals, and give you honest advice before any money is spent.

02

Design Development

Working with your architect or ours, we develop a design that's buildable, on budget, and right for your property.

03

Technical Design & Cost Control

All drawings, specifications and costs are discussed before work begins, to avoid surprises before work gets started.

04

Construction Delivery

Dedicated site management, coordinated trades, and daily accountability to keep your project on programme and to standard.

05

Completion & Handover

A thorough sign-off process, full documentation, and a home that's ready to live in, finished the way it was specified.

why choose us

Our Structured, Accountable Delivery Process

Main Contractor Expertise

Single point of responsibility from pre-construction to handover. We manage programme, subcontractors, cost control and compliance to ensure coordinated delivery.

Structured Delivery

Defined scopes, detailed programmes and disciplined cost management. Our systems are built around clarity, control and predictable outcomes.

Transparent Communication

Regular reporting, documented variations and proactive issue resolution. Clear decisions. No ambiguity on cost or programme.

Quality-Focused

Dedicated site management and strict quality control. High standards maintained across structure, services and finishes.

Accountability

Formal contract structures and full responsibility for performance. We deliver agreed outcomes, on programme and to specification.

testimonials

The Builders Trusted by Homeowners Across Oxfordshire

We honestly couldn’t be happier

DKM Builders have just finished our loft conversion and we honestly couldn’t be happier. From the start, they gave us a clear quote and explained exactly what was included. Yoti and the team were on site every day, working hard and always willing to suggest ideas or sort out any problems that came up.The quality of the work is excellent, and even our neighbours have commented on how good it looks. Building work can be stressful, but having a team with such a strong work ethic and friendly attitude made the whole thing much easier than we expected. We’re really pleased with the end result and have already recommended DKM to friends.

Chris Miller

Banbury

10 out of 10, an absolute pleasure

I could not recommend DKM Builders more highly. They were prompt from the initial consultation. Everything was clear and explained beforehand, nothing was a surprise. They were very quick to mobilise for the work. Workmanship is top quality, they keep everything spotless and were polite and courteous to everyone. There was no delays and they were present from the start until the job was complete. If I have more work coming up I definitely know who I will be calling. 10 out of 10, an absolute pleasure and top quality work. Don't hesitate to use them, you wont regret it.

Lewis Baker

Headington

The quality of their work is 1st class

We asked Dkm builders to put on a new slate roof & build a front porch. We had previously used the builders for some refurbishment work in our house so did not hesitate to use them again. We’re really pleased with our new slate roof & porch. The brick work & wood finish on our porch looks fantastic. The quality of their work is always 1st class & they always consult on all parts of the job to make sure their customers are happy. They have a good eye for what looks good & take pride in what they do. I definitely recommend DKM for all projects.

Jonathan Freegard

Chipping Norton

I would highly recommend DKM Builders!

Thank you to everyone at DKM Builders for all the help at my house. I required an extensive top-to-bottom renovation following a major leak. DKM Builders took care of everything (strip out, replastering, repainting, kitchen fitting, flooring fitting, electrics, plumbing). The team worked hard to get the job done and were tidy and punctual. Communication with Yoti was smooth throughout the process, he always made time to respond to any questions I had. The project was completed on time and within budget and I am very happy with the finish. I would highly recommend DKM Builders to others!

Mat

Kidlington

Collaborative delivery

Our Architectural Planning Services: Design & Construction, Your Way

We coordinate architecture, engineering, and construction to deliver projects smoothly from concept to completion. Client-appointed architects and designers are fully welcomed, ensuring a truly collaborative process with clear communication and control.

Architectural Planning Services

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Ready to Start a Project?

If you’re planning work for your home, whether building an extension, conversion, refurbishment or complete new build, we’d be happy to discuss your requirements. Get in touch to arrange a professional consultation and explore how we can support your project from the outset.

Request a Consultation

0800-048-7618