
Quality Home Addition Builder in Windham, ME
Windham is two towns for an addition, the subdivisions of North Windham and the camps along Sebago and Little Sebago Lake, and a home addition builder in Windham, ME needs a plan for each. We price every Windham addition on finished drawings and a fixed contract, and Joe Hausler reviews each phase on site before the next one starts.

- Founded in 2021
- 4-6 active builds at a time
- Written 5-year workmanship warranty
A home addition builder in Windham, ME designs and builds new rooms onto an existing house or lake camp and connects them to its foundation, roof and systems. In North Windham that usually means a primary suite or family room, while camps on Sebago and Little Sebago Lake often need a year-round upgrade alongside the new space.
Windham additions with us average about $345 per square foot of new living space, opening near $306 and reaching $380 to $434 or more with upper-tier finish. Every one is a fixed-price contract on finished drawings.
On a lake lot, shoreland rules govern where and how an addition can expand, so we confirm the applicable limits with Windham before anything is drawn. Joe Hausler reviews each phase on site, and a written 5-year workmanship warranty covers the finished addition.
Why Windham Residents Hire Us for an Addition
- Primary suites for North Windham homes
- Family rooms that help camps become year-round houses
- A written 5-year workmanship warranty
Windham residents hire us for an addition because we know the shoreland rules on Sebago and Little Sebago can shape a lake addition more than the owner's wish list does. Joe Hausler spent 15 years managing commercial construction, up to developments as large as $300 million, and he brings that rules-first planning to every Windham project.
- Shoreland setback and expansion limits confirmed before lake designs
- Septic and well locations mapped before any bedroom is added
- Fixed pricing on complete drawings and a written report each week
- 5-YearWorkmanship warranty, in writing
- 4-6Active builds at a time, never more
- $300MLargest project Joe has managed
What do homeowners say about us?
We appreciated how collaborative Legacy Construction was throughout our project. They listened to our ideas, offered practical solutions, and kept everything on track. The finished work is beautiful and built to last.
Legacy Construction built an addition onto our home, and the quality is outstanding. The new space blends perfectly with the original house. They worked with us on budget and design and were always upfront about costs and options. Very professional from start to finish.
Watching our home transform through this addition was incredible. Legacy Construction communicated clearly, respected our space and vision, and delivered work that feels solid and intentional.
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What Other Contractor Services Do We Offer in Windham?
Where Else Do We Do Home Addition near Windham?
Where is our office?
Directions from Windham, ME to our office in Portland
185 Ridge RdPortland, ME 04103
What Should a Windham Addition Solve First?
A Windham addition should solve whatever limits the house most, which in North Windham is usually bedroom space and at the lake is usually year-round livability.

Primary Suite Additions in North Windham Neighborhoods
North Windham's postwar and newer subdivision homes are good candidates for a first-floor primary suite, giving owners a bedroom and full bath on one level without moving. The regular framing in these houses keeps the connection predictable and the price steady.
We place the suite where its plumbing can reach the existing lines or the septic connection with the least digging. On a house served by a private system, the extra bedroom is checked against the septic design capacity before we draw.

Family Room Additions for Windham's Converted Lake Camps
Converting a Sebago or Little Sebago camp to year-round use usually means insulation, foundation, septic and heat all at once, and that is the right moment to add a family room. One project then brings one foundation crew, one permit and one disruption instead of two.
We would rather design the camp upgrade and the new room together than build a room onto a house that is not ready for winter. The family room gets the lake view, and the old camp gets the insulation and heat it always lacked.

Second-Story Additions Within the Sebago Shoreland Zone
Owners of lake camps inside a shoreland setback should not assume that going up avoids expansion restrictions. State shoreland zoning and Windham's adopted ordinance govern what is permitted, so we confirm the applicable footprint, height and expansion limits with the town before drawing a second story.
That makes a second story on a waterfront camp a calculation before it becomes a design, and we work through it with the town early. Off the water, a second story is often the most efficient addition in Windham, since it shares the foundation and roof the house already has.
What Home Addition Services Do We Offer in Windham?
Home addition services we offer in Windham handle the full job, from septic and shoreland checks to finished trim, under one contract and one point of contact.
- Second-story additions
- Primary suite additions
- Foundation upgrades and the structural tie-in to a camp or house
The foundation and tie-in carry special weight on converted camps, which may sit on foundations never meant for year-round use. We plan that foundation work before anything else.
What Is Our Home Addition Process in Windham, ME?
Check the rules and the systems.
We confirm shoreland limits, septic capacity and the well location for your Windham property, then spend four to six weeks on drawings and a fixed price.
Permit, build and inspect.
Windham Code Enforcement issues the building permit, and Joe personally reviews each phase before the next crew is allowed to start.
Walk through and hand over.
We tour the finished addition with you, close the punch list and deliver a written 5-year workmanship warranty.

How to Judge a Home Addition Builder in Windham, ME
Judge a home addition builder in Windham, ME by whether they bring up the shoreland expansion limit before you mention it. On a Sebago or Little Sebago lot, that one rule can decide the size of the addition.
Then ask how they price a camp conversion together with a new room. A builder who prices only the addition, and leaves the foundation, the septic system and the heat for later, is handing you the expensive surprises.
Last, ask who will check the work between trades. Our answer is Joe, in person, several times a week, and we cap our active builds at four to six to keep that promise.
Request evidence of current liability and workers' compensation coverage as well, so you know what protection the builder carries before work begins.

Who Builds in Windham, Where on the Lot, and When
The people building additions in Windham are mostly North Windham families who need another bedroom or suite and lake owners turning a seasonal camp into a full-time home. Windham has shifted from a lake town to a bedroom community, and its additions follow that change.
An addition on a Windham lot can go wherever the setbacks, the septic field and the well allow, and on Sebago, Little Sebago or Highland Lake the shoreland setback usually decides first. Lake lots should be checked against the FEMA flood map as well.
Start a Windham addition on paper in the fall if the goal is to build between summer lake seasons. Shoreland review, the project scope and the agreed schedule determine whether that window works; frost and snow also affect when foundation and roof work can proceed.
How much does it cost to add a room or suite in Windham?
The cost to add a room or suite in Windham averages about $345 per square foot of new conditioned space. Each band is an average taken across many completed additions, which makes it a way to gauge your plans, not a quote.
| Addition band | What it typically means | Windham range* |
|---|---|---|
| Entry band | Single room, standard finishes | From about $306 / sq ft |
| Mid band | Primary suite or bath, matched exterior | About $345 / sq ft |
| Upper-tier finish | Premium finishes, lake-facing glass, custom trim | $380 to $434+ / sq ft |
Turnkey per square foot of new heated living area. Camp foundation work, septic upgrades and shoreland-driven design changes can move a Windham addition outside these figures.
What does a septic upgrade cost in Windham?
A septic upgrade in Windham typically costs $17,500 to $44,000 when an addition's new bedrooms exceed the existing system's design capacity. Shoreland rules near the lakes can also affect where a new system may go.
Why does a camp conversion change the budget?
A camp conversion changes the budget because the original camp may need insulation, a real foundation and a heating system before it can support a year-round addition. We price that work beside the new room so you see the whole cost at once.
What do plans for a Windham addition cost?
The plans for a Windham addition depend on room size and on any shoreland coordination needed for the lot. Record the design and any required stamped review in the proposal so the total covers the work once.

How Do You Start a Windham Project?
You start a Windham project with a call and a site visit, where we look at the house, the setbacks and the systems before anyone sketches a room. The visit helps identify options, an initial price band and the municipal or technical checks needed to confirm a buildable design.



