Extensions and loftconversionsin Blackfen

Blackfen is minutes from our office at Onega House, 112 Main Road, Sidcup, DA14 6NE. It is one of the areas we know best, and surveys and site visits are simple to arrange during working hours, Monday to Friday, 8am to 5pm.

The area is characteristically 1930s: rows of semi-detached houses with bay fronts, narrow side passages, hipped roofs and long rear gardens, with some later infill and post-war housing among them. That consistency is useful: we know how these houses are built, where the drains tend to run, which bricks match and how the roofs behave.

It also means one particular strategy comes up again and again: a rear extension to open the kitchen onto the garden, combined with a loft conversion for a fourth bedroom, delivered in one programme rather than as two separate projects years apart. Doing both together saves on scaffolding, protection, making good and disruption.

Other regular requests are hip-to-gable and rear dormer loft conversions, knock-throughs between the front and back reception rooms, garden rooms at the end of longer gardens, and full refurbishment of houses that have not been updated in decades.

The 1930s semis around Blackfen typically suit a rear extension combined with a loft room, giving a family the ground-floor space and the extra bedroom in one programme rather than two.

Every Blackfen project runs through the same five stages: design, planning and preparation, procurement, construction and project supervision, all managed in-house by a team with 30 years of experience, with principals who are members of the Chartered Association of Building Engineers. You can request an estimate or read more about how we work.