Many homeowners want their double storey extension to look as though it has always been part of the house and achieving this requires careful planning, structural accuracy, and high quality workmanship.
- Structural alignment
For a seamless finish, the new foundations, load bearing walls, steel beams, and floor levels must align perfectly with the existing structure. This prevents movement, cracking, and uneven finishes later on.
Example: When extending above an existing kitchen, we match floor heights exactly so the new upper level feels natural and continuous. - Matching rooflines and external materials
The new roof pitch, tile type, brickwork, render, or cladding must complement the existing home. Correct detailing prevents a visible “join line” where old meets new.
Example: In traditional Edinburgh stone homes, we source closely matched stone or use carefully chosen render to maintain character. - Integrating insulation and energy performance
The extension must meet modern energy standards. Upgrading insulation, sealing, and ventilation where new meets old improves comfort and prevents heat loss.
Example: Many older Edinburgh homes benefit from enhanced insulation at the junction between old and new walls. - Careful internal transitions
Staircases, door openings, and ceiling heights should flow naturally between spaces. Small adjustments in framing or layout make the new rooms feel like part of the original home.
Example: We often widen openings between floors to create a smoother transition and better light flow. - Planning permission and building warrants
Double storey extensions almost always require approvals in Scotland. Ensuring designs meet planning policy and Scottish building standards keeps the project compliant and avoids costly redesigns.
Example: We prepare drawings and structural details that pass building warrant checks first time. - Professional project coordination
A seamless integration relies on timing and skill across multiple trades joinery, roofing, electrics, plumbing, and finishing. Proper planning ensures everything lines up perfectly.
Example: Coordinating roofing and joinery at the right stage prevents gaps or mismatched junctions.
Final Thoughts
A well built double storey extension should feel like a natural continuation of your home, both inside and out. With the right structural design, finishes, and professional installation, the new space blends beautifully with the existing property. At Sawmill Contracts, we help homeowners across Edinburgh create extensions that are structurally sound, energy efficient, and visually seamless adding space and value without compromising the character of the home.