Home Addition Contractor in Alhambra - Design, Permits and Build Under One Contract

Fast, Reliable Home Addition Contractor Across Alhambra

If you’re planning a home addition in Alhambra, you’re likely looking at two things: square footage and a realistic number for what it costs. A room addition in Alhambra typically runs $180 – $320 per square foot depending on foundation work, roofline changes, and whether we’re tying into an existing 1920s bungalow or a postwar tract home. A full second-story addition lands higher, commonly $250 – $400 per square foot, because Alhambra’s older framing often needs structural reinforcement before we can build up. Call (254) 602-5618 and we’ll walk your lot, check the access, and give you a written price before any work starts.

Call (254) 602-5618

We work throughout Alhambra, from the tree-lined blocks near Almansor Park to the bungalow courts off Valley Boulevard. Tight lots, rear alleys, shared driveways, detached garages from the 1930s and 1940s: these are the conditions we plan for on nearly every Alhambra project. Planning and staging on a constrained site changes the quote, and it’s exactly the kind of detail a generic square-foot estimate misses.

Why Lodgewick ADU Builders Is Alhambra’s Preferred Home Addition Contractor Company

Lodgewick ADU Builders is the ADU company of the Kingswell family, and every project we take in Alhambra operates under The Kingswell Guarantee: a written price before work begins, a defined arrival window, a clean job site, and a written guarantee on every job. If the work fails within 365 days, we come back and make it right. That commitment is in writing, on every project, before the first nail is driven. Russ Delmar leads our Alhambra projects, and he’s the person who shows up to walk the lot, review the plan-check comments, and talk through what the city will actually require.

Alhambra runs its own municipal planning counter and ADU ordinance, entirely separate from LA City and unincorporated LA County. We’ve sat through enough Alhambra plan checks to know that a submittal prepared on county assumptions often stalls at the city’s counter until the site plan, fee calc, and seismic retrofit scope are redone. That local familiarity changes how we quote, what we flag before you spend money on plans, and how accurately we can predict the permit timeline. Dispatch and scheduling are coordinated from our Los Angeles office; the crews serving Alhambra are local to the San Gabriel Valley.

When you call (254) 602-5618, a live person answers. Not a voicemail loop, not a chatbot. Every technician who steps onto your Alhambra property is background-checked and uniformed, so you always know who’s on site.

Bathroom Addition Contractor in Alhambra

A Bathroom Addition Contractor in Alhambra is who you call when you want a full bath added to a house where the only full bath is down a narrow hall. We do this job on Alhambra’s 1920s – 1950s bungalows and Spanish Colonial Revival cottages constantly: extend the footprint, tie into existing waste lines, reframe a wall, and bring the new space up to current plumbing code. In Alhambra, adding a full bath typically runs $45,000 – $90,000 depending on whether we’re bumping out the foundation or capturing space from an existing bedroom or closet. The city’s plan check will want to see the soil report and the foundation detail, and on older homes with galvanized supply lines, a repipe to the new fixture is usually required.

Older-Home Plumbing Upgrades

Most Alhambra homes built before 1950 still have galvanized supply lines. Once we open the wall for a bathroom addition, those lines get inspected, and if they’re corroded or undersized, the city requires replacement back to the main. We include that scope in the written price so you don’t discover it as an add-on at rough-in.

Working Within a Tight Footprint

A bathroom addition on a mid-size Alhambra lot usually means gaining square footage by bumping out toward the side yard or converting a rear porch. On tight lots, we stage materials on the alley or the street with a permit, keep one crew truck on site, and coordinate with neighbors when the shared wall or property line is close enough to matter.

Bedroom Addition Contractor in Alhambra

A Bedroom Addition Contractor in Alhambra is what you need when a family outgrows a two-bedroom bungalow and moving isn’t on the table. We add a bedroom by extending the rear or side footprint, converting underused interior space, or building up with a second-story bump. On Alhambra’s mid-size lots, a ground-floor bedroom addition usually runs $70,000 – $140,000, while a second-story bedroom over an existing wing runs $120,000 – $200,000 because of the structural work, stairwell, and roofline tie-in. The city will require structural calcs and, on many of these older homes, a cripple-wall retrofit before they sign off on the foundation extension.

Bedroom Over the Garage

Alhambra’s rear alley garages are almost universally detached single-car structures from the 1920s – 1950s. Adding a bedroom over the garage means verifying that the existing footings and shear walls can carry the second story. On most of these garages, the city’s plan check requires a full seismic brace set and a structural upgrade before the framing permit is issued.

Permit and Plan-Check Realities

Alhambra’s building department reviews bedroom additions for egress, light and air, and minimum dimension compliance. On older ranch-style homes, we often see floor plans where the “new bedroom” is really a converted porch that won’t pass egress. We flag that before you spend on plans, because that’s the kind of surprise that costs people a full redesign in Alhambra’s queue.

Trusted Brands We Service in Alhambra

We build with materials matched to each Alhambra lot, budget, and timeline. For prefab and panelized ADU work, we work with Abodu, Cover, and Dvele. For siding and exterior trim, James Hardie fiber cement holds up to the San Gabriel Valley’s dry summers and winter rain better than most wood products, and it’s what we spec on most Alhambra additions. We also service existing Tuff Shed conversions and have hands-on familiarity with Boxabl and Plant Prefab for clients who want a factory-built shell. Parts and material lead times for Alhambra customers are factored into our written price, not added later.

Common Home Addition Contractor Problems We See in Alhambra Homes

• Undersized electrical service: Alhambra’s housing stock from the 1920s – 1950s commonly has 60 – 100 amp panels. A home addition with a new bedroom, bath, and HVAC load almost always requires a 200-amp service upgrade, and Alhambra’s plan check treats it as a separate review item before framing approval.
• Galvanized supply lines and asbestos conditions: Once we open walls on an older Alhambra home, we frequently find galvanized plumbing that won’t pass inspection and potential asbestos in old flooring or duct wrap. Remediation adds scope before framing, and we price it in writing so you’re not surprised mid-project.
• Plan sets built on county assumptions: A permit package prepared for unincorporated LA County often gets bounced at Alhambra’s own planning counter. The city has its own ADU ordinance, fee schedule, and plan-check queue, and we’ve seen projects lose weeks redoing site plans that would have passed elsewhere.
• Underpriced access and staging: On tight Alhambra lots with rear alleys, shared driveways, and party walls, staging and coordination add real hours that never appear on a generic square-foot estimate. We walk the lot and price the access before we quote, so the written number matches the actual job.

Pricing for Home Addition Contractor in Alhambra, CA

We Also Serve Cities Near Alhambra

If your property sits just outside Alhambra’s city limits, we serve Home Addition Contractor in Alhambra projects throughout the San Gabriel Valley, including South Pasadena, San Marino, Monterey Park, and San Gabriel. Each city runs its own planning counter, so we verify the local ordinance before we quote. Call (254) 602-5618 and tell us your cross streets.

FAQs About Home Addition Contractor in Alhambra