Build Small Custom Lean-To Greenhouse

Looking for an experienced carpenter or handy builder to construct a small, neat lean-to greenhouse (approx. 2.0m wide × 1.2m deep) against the front wall of a steel garden cabin, mounted onto an existing composite deck. ​I have attached a photo of the current cabin doorway/deck area along with a reference diagram of what I have in mind. The diagram is just a guide—I am flexible and happy to hear your recommendations if you have a simpler or more cost-effective way to build it, provided it stays weather-tight, sturdy, and neat. ​Key Requirements: ​Size & Slope: Approx. 2.0m (W) × 1.2m (D), sloping forward away from the cabin wall (approx. 2.4m back height down to 2.2m front height) for rain runoff. ​Base & Cabin Seal: Timber posts anchored securely through the composite deck boards into the composite joists underneath, and sealed cleanly against the steel cabin wall so rainwater doesn't run down behind it. ​Frame & Polycarbonate: Simple treated timber frame with clear UV polycarbonate walls/front and a clear twinwall polycarbonate roof. ​Door: Fit a basic, standard outward-opening single glazed uPVC exterior door (doesn't need high-end multi-point locks—just a simple, weather-tight door that closes cleanly). ​Materials: ​This budget is for labor only. We will discuss and arrange the material list and supply directly together once assigned. ​Essential: ​Experienced carpenter or builder with own tools (including drill bits suitable for steel and composite). ​Must hold active Public Liability Insurance.