Additions & Major Improvements

More space,
seamlessly added.

Additions, extensions, and significant structural improvements that feel as though they were always part of the home.

Overview

A well-executed addition respects the original architecture while giving the home what it has been missing, whether that is a family room, a primary suite, a garden-level extension, or a new wing.

These projects involve structure, permitting, and the meeting of old and new construction. We coordinate the process carefully and keep every decision visible to you.

Scope

What this work can include.

Additions and extensions
New rooms and wings designed to align with the existing structure and architecture.
Lower levels and attics
Underused space converted into finished, comfortable living areas.
Structural improvements
Openings, reinforcement, and reconfiguration that change what the home can be.
Exterior and outdoor living
Terraces, facades, and garden connections that extend the home outward.

Before You Start

What to plan for.

Check zoning first
Local zoning rules govern how large an addition can be and where it can sit on the lot; your architect or designer should confirm this before design goes far.
Plan the connection to the existing house
Tying new structure, roofing, and systems into the original home is often the most complex part of an addition.
Allow time for permits and review
Additions almost always need permits, and homes in historic districts may need preservation review as well.

Roles on Your Project

Clear roles. One point of contact.

Hawthorne Mason

Your advocate and point of contact from the first conversation to completion.

  • Project originationWe identify and shape the opportunity with you from the first conversation.
  • Client consultationWe help you define scope, priorities, and expectations before work begins.
  • Contractor introductionsWe introduce GridStone, our licensed construction partner.
  • Ongoing coordinationWe remain your point of contact and keep communication moving.
  • Project reportingWe provide clear, regular updates on progress, schedule, and decisions.

GridStone

Our strategic construction partner.

  • Construction agreementContracts directly with you for construction services.
  • Construction workPerforms the construction work under that agreement.
  • Terms of the workScope, schedule, and pricing are set in your agreement with them.

Hawthorne Mason is not a general contractor, does not perform construction work, and is not the contractor of record on any project. Construction services are provided under a separate agreement between you and GridStone, our licensed construction partner.

Start Your Project

Considering additions & major improvements?

Share a few details about your home and what you have in mind. We will respond within two business days to arrange a conversation.