Oak frame extensions designed, configured and built to spec

You are sourcing an oak frame extension for a client. The brief demands traditional material, modern rigour, and the confidence that planning permission will hold. Most suppliers offer either the craft story or the engineering story—rarely both, and almost never with solar integrated from the start. Green Oak Solar Frames is built around that gap. We hand-cut solid green oak in-house, design each extension in consultation with your specification, and use a live 3D configurator so you and your client see the finished structure, material colour, solar integration, and cost in one place before a single cut is made. No renders. No guesswork. No retrofit solar bolted on afterwards.

The extension oak frame is the skeleton of the project. It carries weight, it carries meaning, and it shapes every permission conversation with building control. Our frames are cut to fit your client’s exact geometry and site constraints. Because we work from live 3D configuration, structural logic is visible from the start—rafter pitch, joist span, wall thickness, door and window placement—and any change is instant. This removes the back-and-forth that delays projects and clouds costs. Architects and builders we work with report faster approvals because the engineering is transparent and site-ready from the configuration phase.

Green oak is not a compromise aesthetic; it is a structural and environmental choice. Freshly cut, it moves and settles over time as it seasons naturally on site. This slow process creates the appearance and integrity that clients specify oak for. Unlike kiln-dried timber, green oak retains moisture content that allows it to flex and adjust to your build, reducing cracking and joint failure. It is also a material with genuine embodied carbon advantage over steel or concrete frame alternatives, which matters to clients and planning officers evaluating sustainability credentials.

Solar integration is standard in our extensions, not an add-on. Depending on the roof pitch and client requirement, we offer integrated solar roof tiles, battery storage systems, or EV charging infrastructure built into the frame design. This is not a solar company that happens to build oak frames; it is an oak frame studio that designs every structure with energy generation embedded in the brief. Your client gets a genuinely net-zero capable extension, not a traditional frame retrofitted with solar panels.

Planning permission is the gate every extension must pass. Because our frames are designed in the configurator with full structural visibility—dimensions, material, thermal performance, solar integration—you hand planning officers a complete, coherent technical narrative, not a concept with engineering TBD. We do not claim to manage your planning application, but we deliver documentation and clarity that architects and builders tell us shortens approval timelines and reduces revision rounds. Building control conversations are faster when the frame geometry, joist sizing, and load paths are already defined.

The configurator is how you work with us. Upload your site plan, set your extension geometry, choose green oak colour and section, specify solar configuration, and the 3D model updates in real time. Costing is live. You can share the model with your client, iterate, lock the spec, and move to build. Revisions are quick; what takes weeks in traditional CAD takes minutes here. For architects and builders managing multiple projects, this workflow saves days per year. It also means national delivery works smoothly—we build to your locked specification, not a generic design adapted on site.

Delivery is nationwide. Because the frame is cut to specification in our workshop, site logistics are predictable. We do not hold generic stock waiting for a project to arrive; every extension is made for the client it serves. This reduces waste, ensures material quality consistency, and means your project timeline is firm. You know when the frame arrives, you know it will fit, and you know the solar integration will be ready to commission as part of handover.

Cost entry point for the range starts at £31,485, but a genuine extension specification will reflect your client’s site, roof pitch, insulation choice, solar requirement, and finish. Use the live configurator to see real pricing for your exact brief; it is faster and more honest than a phone quote. Architects and builders we work with often configure 3–4 options with clients present, comparing oak section size, solar type, and thermal spec side-by-side, so choice and value are transparent.

Choosing an oak frame supplier is choosing a partner for a visible, long-lived part of your client’s home. You need material integrity, engineering rigour, planning clarity, and a workflow that respects your time. Green Oak Solar Frames brings all four—craft-led making, transparent design, solar by default, and nationwide reach. The next step is a conversation. Tell us the brief, configure the extension, lock the spec, and build with confidence.