
Lexington, Massachusetts
Second Story Additions in Lexington, MA
A second story addition in Lexington starts with what is under the roof: the walls and foundation have to carry another floor they were not built for. Our team brings in an engineer, designs the reinforcement, and keeps the house covered while the roof is open.
- Serving Lexington, MA
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Second Story Additions in Lexington
Second Story Additions for Lexington Homes
Old farms here turned into suburban subdivisions over time, while older homes still cluster near the center and Vine Brook winds through. For a second story in Lexington, an engineer reviews the foundation and walls first, and one general contractor coordinates the framing, roof work, systems, and new stairs that follow.
Work on a new floor we handle in Lexington:
- Second stories for older homes near the Battle Green
- Full or partial floors over the existing house
- New stairs linked to the rooms below
- Walls and footings reinforced where needed
- Wiring, plumbing, and HVAC carried to the new floor

Local conditions
Key Facts for a Second Story in Lexington
Ground near Vine Brook can stay damp after rain, so drainage is reviewed before work is planned. On a second story, the existing structure is checked by an engineer, walls and footings are reinforced where needed, and the house is protected while it is open to the weather.
What we check before design:
- The existing foundation under the house
- Walls that will carry the new floor
- The floor framing and load paths
- The roof that comes off
- HVAC, water heater, and panel capacity
Going up can make sense if:
- The lot has little space to build out
- You need several bedrooms and another bathroom
- You want to keep the yard as it is
- Your family is growing beyond the house
- You like the neighborhood
We look at the house during the estimate and involve an engineer before design, so the new floor is planned around what the foundation and walls can hold, not around a guess.
Our process
Our Second Story Process in Lexington
A second story in Lexington moves through a strict sequence: structural evaluation, temporary support, roof removal, reinforcement, framing, systems, and finishes. Every step is planned before the roof comes off, since the house stays open to the weather until the new floor is closed.
- 01
A Whole New Floor
A new level over the whole house, frequently with several bedrooms and bathrooms.
- 02
Partial Second Stories
An upper floor over one wing or a suite above the garage.
- 03
New Bedrooms and Bathrooms
More bedrooms and bathrooms on the new floor for a growing family, without giving up the yard.
- 04
A Private Suite
A bedroom, bath, and closet space planned away from the main living areas.
- 05
A New Staircase
A new staircase and openings connecting both floors naturally.
- 06
Systems Upstairs
Wiring, supply and drain lines, and HVAC extended up through the house, with the panel, water heater, and HVAC reviewed early for capacity.
Local details
Second Story Planning Facts for Lexington
Lexington sits in Middlesex County and is part of the Northeastern Massachusetts area we serve most. We build second stories there, as well as most of Middlesex County and Greater Boston, and below you will find the local basics we confirm before the structural evaluation of the house.
| Detail | Lexington, MA |
|---|---|
| County | Middlesex County, Massachusetts |
| ZIP codes | 02173, 02420, and 02421 |
| Our office | 308 Sutton St, North Andover, MA |
| Service area | Middlesex County and Greater Boston |
| Estimate | No-cost in-home estimate and a written scope |
| Often combined with | New wiring and HVAC throughout the house |
Cost factors
What Affects Second Story Costs in Lexington
Six things set the cost of a Lexington second story: how big the new floor is, the condition of the foundation and walls, what reinforcement the engineer specifies, the new roof, any bathrooms upstairs, and the finishes. The price comes after the structural evaluation.
Largest cost factors:
- Size of the new floor
- State of the foundation and walls
- Structural reinforcement the engineer requires
More items in the price:
- Roof design and removal
- Bathrooms and systems upstairs
- Stairs and finishes
Nearby
Building Up in Towns Near Lexington
Not in Lexington? We also add second stories in Medford, Melrose, Belmont, and Burlington, as well as across Middlesex County and Greater Boston. The approach stays the same wherever the house is: an engineer reviews the structure first, the roof is opened in planned sections, and the open areas are covered at the end of each day.
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Free estimate
Get a Free Second Story Estimate in Lexington
A second story in Lexington begins with a no-cost in-home consultation. We look at the roof, walls, and foundation, talk about the space you need upstairs, and review the HVAC, water heater, and panel, then send a written scope once the structural evaluation is complete.
Request a free in-home estimate online or call (978) 917-9072. No obligation applies, and our team will contact you to schedule the visit.
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- Free In-Home Estimate
FAQ
Second Story Additions in Lexington: Common Questions
Here are direct answers to what Lexington homeowners ask about a second story: permits and structural drawings, the engineer’s review, roof removal, and what happens on the first visit. Still unsure? Call our team, and we will explain the options for your house in plain language.
What permits does a second story in Lexington need?
A permit with structural drawings stamped by an engineer, and in many towns a zoning review for building height. The inspector checks the structural work, the framing, the electrical, plumbing, and HVAC, the insulation, and the final work. We bring in the engineer, file the applications with the town, and schedule each inspection.
Will my Lexington home need structural reinforcement?
In many cases, yes. An engineer reviews the foundation, the walls, and the floor framing before design, then specifies what is needed: beams, posts, larger footings, or new framing. Shoring holds the house stable during that work, and it is removed only after the permanent structure carries the load.
Will the existing roof be removed?
Often, at least in part. A new floor over the whole house means taking off the existing roof, but a partial addition, such as a suite above the garage, may open only one section. In both cases, we remove the roof in planned sections and protect anything left open at the end of each day, so rain does not get in.
How do I get started on a second story in Lexington?
Book a free in-home visit on this page or call (978) 917-9072. Someone from our team comes to your Lexington home, looks at the structure and the roof, asks about what the new floor is for, and explains the engineer’s review that comes next. Your written estimate is sent after that review, and you are under no obligation.
